Environmental Science
P. Kumar; D. Deka; A. Yadav; Ashwani .; M. Kumar; J.P. Das; A. Singh; A. Gurjar
Abstract
BACKGROUND AND OBJECTIVES: Evapotranspiration is an important component of water balance associated with the hydrological cycle and biological processes. Accurately estimating the rate of evapotranspiration is crucial for understanding fluctuations in water availability and effectively managing water ...
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BACKGROUND AND OBJECTIVES: Evapotranspiration is an important component of water balance associated with the hydrological cycle and biological processes. Accurately estimating the rate of evapotranspiration is crucial for understanding fluctuations in water availability and effectively managing water resources in a sustainable manner. The study aims to examine the correlation between actual evapotranspiration and potential evapotranspiration by assessing the linkages with vegetation and snow cover in an ecologically fragile located in the northwestern Himalaya.MATERIALS AND METHODS: The present study uses remote sensing Landsat satellite data series to map vegetation cover and snow cover in the area. Remote sensing data accessed from Moderate Resolution Imaging Radiometer evapotranspiration project data was used for calculating evapotranspiration and potential evaporation. The data from the Climatic Research Unit (2000–2022) was additionally utilized for the computation of potential evapotranspiration. The study investigates variances in evapotranspiration and explores correlations between normalized difference vegetation index and normalized difference snow index. It further examines the correlation between potential evapotranspiration and actual evapotranspiration.FINDINGS: The study conducted from 1991 to 2021 demonstrates a notable rise in vegetation cover by 20.18 percent, showcasing spatial variations across the region. Conversely, there has been a significant decline in the extent of snow cover throughout this period. A positive correlation was identified between vegetation cover and evapotranspiration, whereas a negative correlation was observed between snow cover and evapotranspiration. Actual evapotranspiration is on the rise while potential evapotranspiration is declining throughout the region.CONCLUSION: Hydrological cycle of a region is governed by many factors such as climate (precipitation, temperature), geohydrology, land use and land cover, socio-economic condition of habitants and institutions. Vegetation cover, snow cover, actual evapotranspiration and potential evapotranspiration and their relationship indicates changes in local and regional climate. An incremental rise in plant growth across the study site, coupled with spatial variability and a reduction in snow cover in the elevated mountainous zone, is influencing both actual evapotranspiration and potential evapotranspiration. Increase in actual evapotranspiration in the High Himalayan area of Himachal Pradesh attribute to substantial increase in vegetation cover in the dry cold desert region. The findings of the study will contribute to the comprehension of essential elements of water cycles and water budgets, facilitating improved resource allocation for climate-resilient sustainable initiatives.
Environmental Management
D. Rinchumphu; N. Suriyanon; N. Phichetkunbodee; S. Munlikawong; C. Wanitchayapaisit; S. Sitthikankun
Abstract
BACKGROUND AND OBJECTIVES: Rapid urbanization negatively affects the hydrologic cycle and makes cities vulnerable to disastrous flash floods. It can additionally cause erosion and water pollution in natural ecosystems. Global climate changes have exacerbated such issues, further upsetting hydrologic ...
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BACKGROUND AND OBJECTIVES: Rapid urbanization negatively affects the hydrologic cycle and makes cities vulnerable to disastrous flash floods. It can additionally cause erosion and water pollution in natural ecosystems. Global climate changes have exacerbated such issues, further upsetting hydrologic patterns. Therefore, many regions have considered the rain garden as green infrastructure, which can help mitigate urban runoff. However, design guidelines and the means of assessing rain garden cost effectiveness in the Global South are limited. Furthermore, as many countries in the Global South experience a tropical climate, design guidelines developed in the temperate Global North may not be directly transferable. The need for more information on design and cost effectiveness can make designers and decision makers hesitate to implement such a new strategy. The main objective of the present study is to create a design approach and simultaneously specify the cost of the infiltration rate of the rain garden in urban areas.METHODS: This study focuses on the ability of rain garden design to determine accurately the cost of materials used for construction. Sand and gravel are used in different sand ratios in the filter media layer, namely 1:1, 1:2, 1:3, and 1:4. The storage layer uses gravel only and has only one design. The aim is to determine the change in infiltration rate with an increase in the amount of sand. Knowing the amount of sand can determine the cost per infiltration rate.FINDINGS: The results showed that the most efficient design was a rain garden with a soil:sand ratio of 1:4, which increased the infiltration rate per cost by 2.00 millimeters per hour per United States Dollar per square meter. The lowest efficiency option was a soil:sand ratio of 1:1, which increased the infiltration rate per cost by 1.33 millimeters per hour per United States Dollar per square meter.CONCLUSION: This study will serve as a guide for designers to design a rain garden area according to the needs of the area, having determined the construction cost per infiltration rate. However, spatial requirements, construction costs, and social factors may influence future decisions on rain garden design and must be studied further.
Environmental Management
V. Babenko; I. Perevozova; O. Mandych; T. Kvyatko; O. Maliy; I. Mykolenko
Abstract
The level of information today is decisive in the socio-economic development of the country. The purpose of the article is to identify the most influential factors in the process of developing informatization in the context of international globalization. The assessment of factors influencing world information ...
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The level of information today is decisive in the socio-economic development of the country. The purpose of the article is to identify the most influential factors in the process of developing informatization in the context of international globalization. The assessment of factors influencing world information is based on the following stages: forming incoming information about the state of world information, a methodical approach to assessing the impact of world information, modeling the interrelation of components, the influence of world information as hidden factors in the development of information. Factor and correlation analyses are carried out within each cluster with a single level of information by groups of countries. Based on the calculation of factor loads, the most influential indicators have been determined, which serve as the basis for the formation of the informatization process mechanism in the countries of each cluster group. Accordingly, for example, from Innovations and Improvement Factors the major ones were only for the second cluster: Government efficiency and Efficiency of goods market and for the third cluster was the Global Competitiveness Index. The study allowed to determine the main priorities for the development of information in the context of clusters, formed in accordance with the level of information development in the country of each group. Interpretation of the results allowed determining the most influential factors in the development of informatization of the countries of each group, which is the basis for forming recommendations on organizational measures to increase the level of informatization in the context of international globalization.
Environmental Science
F. Shevlyakov; A.B. Laptev; O.R. Latypov; D.R. Latypova
Abstract
BACKGROUND AND OBJECTIVES: Greenhouse gas emissions are the primary cause of global warming. Under the Paris Agreement, all countries have developed programs to reduce anthropogenic impact on the environment. In the petrochemical industry, for example, isoprene, is a major contributor to the production ...
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BACKGROUND AND OBJECTIVES: Greenhouse gas emissions are the primary cause of global warming. Under the Paris Agreement, all countries have developed programs to reduce anthropogenic impact on the environment. In the petrochemical industry, for example, isoprene, is a major contributor to the production of carbon dioxide, generating large amounts of acidic and hydrocarbon gases that are burned and released into the atmosphere. This study aimed to investigate the absorption of greenhouse gases from isoprene production by the marine microalgae Isochrysis galbana and Tetraselmis suecica, as well as the freshwater microalgae Chlorella vulgaris.METHODS: Microalgae cells were cultured in a bioreactor. The grown microalgae strains and mineralized water were fed to the bioreactor. Gases discharged from isoprene production were passed through the bioreactor. Inlet and outlet gas compositions were monitored by chromatography.FINDINGS: Absorption of gases discharged from isoprene production by microalgae was studied for the first time. Chlorella vulgaris microalgae reduced methane and carbon dioxide contents by an average of 20 times. A mixture of microalgae Tetraselmis suecica and Isochrysis galbana reduced methane and carbon dioxide contents by a factor of 10 but completely absorbed hydrocarbon gases from methane to pentane.CONCLUSIONS: The results indicate that microalgae cultivation can be used as a reliable and stable technology for the biofixation of the gases discharged in isoprene production. This technology can eliminate the combustion stage of hydrocarbon gases in isoprene production and significantly reduce carbon dioxide emissions into the atmosphere.
Environmental Management
L.A. Omarbakiyev; S.M. Kantarbayeva; A.K. Nizamdinova; S.T. Zhumasheva; G.Zh. Seitkhamzina; A. Saulembekova
Abstract
BACKGROUND AND OBJECTIVES: Geopolitical risks have made significant changes in the integration ties between the countries of Central Asia, which has affected the sustainable development of the agro-industrial complex and food security. The adoption of urgent measures to improve food security, on the ...
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BACKGROUND AND OBJECTIVES: Geopolitical risks have made significant changes in the integration ties between the countries of Central Asia, which has affected the sustainable development of the agro-industrial complex and food security. The adoption of urgent measures to improve food security, on the one hand, is a necessary condition for the development of the Republic of Kazakhstan, but on the other hand, it can lead to a decrease in the level of environmental security in the country if the possible consequences in the reintegration process are not considered. Therefore, this article aimed to examine the sustainable agriculture practices implemented in Kazakhstan’s agro-industrial complex to improve food security and reduce the environmental impact of agriculture.METHODS: To collect information, a mixed research strategy combining qualitative and quantitative methods was used. The collection of information was carried out in the summer of 2022 and consisted of three stages. In the first stage, statistical information was collected; in the second stage, a correlation analysis was carried out; and in the third stage, a survey of 40 experts was conducted.FINDING: The data obtained indicate that the efficiency of Kazakhstan’s agricultural production strongly and directly depends on the level of the country’s integration into the united Eurasian Economic Union market. Due to the geographical features of Kazakhstan’s location, it is necessary to develop areas that are primarily focused on the internal capabilities of the country. Internal changes will help the industry increase international competitiveness and efficiency while promoting sustainable development and ensuring food security and environmental safety.CONCLUSION: The article determined that it is necessary to prioritize developing multilateral partnerships to address transportation and logistics challenges in the export and import of agricultural products, and reduce dependence on the import of seeds, breeding products, fodder, and agricultural machinery. However, to effectively promote these areas, it is necessary to improve food security through the introduction of sustainable agriculture practices, such as crop diversification, conservation agriculture, integrated pest management, and drip irrigation.
Environmental Management
D. Juhandi; D.H. Darwanto; M. Masyhuri; J.H. Mulyo; N.A. Sasongko; H.L. Susilawati; A. Meilin; T. Martini
Abstract
BACKGROUND AND OBJECTIVES: Food estate initiative is an Indonesian government program designed to achieve food security though the cultivation of strategic commodities on large-scale agricultural land. Despite being controversial due to the scale of land use and budgetary requirements, the viability ...
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BACKGROUND AND OBJECTIVES: Food estate initiative is an Indonesian government program designed to achieve food security though the cultivation of strategic commodities on large-scale agricultural land. Despite being controversial due to the scale of land use and budgetary requirements, the viability of the program has been questioned by critics pointing to the failure of a similar initiative in the past. In other words, there is widespread pessimism regarding sustainability of food estate program. Therefore, this study presents a new approach to farming sustainability investigation, assessing seven aspects including economy, society, environment, institutions, technology, market, and culture. The objective was to compare the value and status of sustainability as well as design land use planning strategies.METHODS: Respondents of the questionnaire were 50 food estate farmers, selected from Pollung sub-district, as well as 50 non-food estate farmers from Dolok Sanggul and Lintong Nihuta Sub-districts. Multiaspect Sustainability Analysis software was used to conduct data analysis with Multidimensional Scaling approach. Primary data was collected through interviews using questionnaires and seven aspects analyzed include economic, social, environmental, institutional, technological, marketing, and cultural, with several factors. In addition, a total of 45 indicators were used to compare sustainability of farms, including 7 economics, 6 social, 9 environmental, 5 institutional, 7 technological, 5 marketing, and 6 cultural.FINDINGS: The results showed that in Food Eestate farming, sustainability value for economic aspects was 47.57, social 50, environmental 72.22, institutional 50, technological 50, market 53.4, and cultural 33.33. On the other hand, sustainability value of non-Food Eestate farming estate was 33.29 for economic, 47.17 for social, 77.78 for environmental, 56.6 for institutional, 42.86 for technological, 36.6 for market, and 41.67 for cultural aspects. The overall sustainability value of Food Eestate farming was 50.93, which was slightly higher than non-food estate score of 48. Improving all aspects in the third scenario is the most favorable approach for improving farming sustainability. Based on the results, 12 sustainability indicators were found to be relevant for designing land use planning strategies. These indicators had different implications for stakeholders in improving sustainability.CONCLUSION: Sustainability value of food estate farming exceeded that of non-Food Eestate but both were in the moderate category. Higher sustainability scores were recorded in economic, social, technological, and marketing aspects for Food Eestate farming, while higher scores were found in environmental, organizational, and cultural aspects for non-food estate . This study recommended implementing land use strategies such as multiple cropping for Food Eestate farming, and crop rotation for non-food estate. To implement the strategy for Food Eesrare farming, the government needed to increase fertilizer subsidies, provide agricultural insurance, relevant technology, extension services on land leases, agricultural sustainability, and water management. For non-food estate farming, the recommendations included providing capital loans, extension services on land tenure, agricultural sustainability, land conversion, inorganic fertilizer dosage, and weed management.
Environmental Engineering
L. Agustina; M. Romli; P. Suryadarma; S. Suprihatin
Abstract
BACKGROUND AND OBJECTIVES: To improve photocatalytic degradation perfomance, photocatalyst particles with a larger surface area preferred. The effectiveness of titanium dioxide as a photocatalyst depends on the synthesis method used. The method affect the particle size, crystallinity and phase composition ...
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BACKGROUND AND OBJECTIVES: To improve photocatalytic degradation perfomance, photocatalyst particles with a larger surface area preferred. The effectiveness of titanium dioxide as a photocatalyst depends on the synthesis method used. The method affect the particle size, crystallinity and phase composition of the produced catalyst. This study aims to develop a green synthesis process of nano- titanium dioxide photocatalysts for the advanced treatment of palm oil mill effluent.METHODS: The green synthesis of titanium dioxide nanoparticles used de Man-Rogosa-Sharpe broth media containing Lactobacillus bulgaricus culture and titanium oxyhydroxide metal oxide. The factors investigated were the molarity of titanium oxyhydroxide (0.025 molar; 0.035 molar and 0.045 molar) and temperature (40; 50 and 60 degrees Celsius). The synthesized photocatalyst was characterized using a particle size analyzer to determine the particle size. The produced photocatalyst with a nanoparticle size range of 1-100 nanometer was further characterized using scanning electron microscopy-energy dispersive X-ray and X-ray diffraction. The photocatalyst was tested for advanced treatment of palm oil mill secondary effluent. The factors investigated in this test included the irradiation time and titanium dioxide photocatalyst dosage. The treatment performance was evaluated in terms of effluent quality and pollutant elimination efficiency.FINDINGS: Nano titanium dioxide photocatalysts have been synthesized through titanium oxyhydroxide metal oxide biologically using Lactobacillus bulgaricus. The synthesis process at a temperature of 60 degrees Celsius and a 0.025 molar metal oxide solution produced a titanium dioxide photocatalyst with a size of 33.28 nanometer. The content of titanium and oxygen constituents in the photocatalyst was confirmed to be 39.06 percent and 47.95 percent respectively, with 67.6 percent titanium dioxide crystallinity in a theta degree of 25.4. This indicates that the green synthesis has produced an anatase diffraction nano titanium dioxide photocatalyst. Testing the titanium dioxide photocatalyst to treat palm oil mill secondary effluent yielded in elimination efficiency of 16.16-27.27 percent for chemical oxygen demand and 11.05-21.95 percent for biological oxygen demand. Phenol, which is toxic and difficult to degrade biologically, could eliminated significantly (up to 81.12 percent) using a photocatalyst dose of 1 gram per liter at a time irradiation of 2.5 hour.CONCLUSION: The biological synthesis of nano titanium dioxide photocatalysts is affected by temperatures and metal oxide concentrations. The photocatalytic process for advanced treatment of palm oil mill secondary effluent shows that this synthesis process effectively eliminates phenols. Some compounds such as lignin, amino acids, and pectin are not significantly mineralized using this process.
Environmental Management
P. Tomski; E. Wysłocka
Abstract
The way of perceiving the environment is the factor informing on the condition of the environment and its impact on the operation of enterprises whereas the impact on the operation is the factor determining how enterprises operate in realities where there is no place for atomized actions of isolated ...
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The way of perceiving the environment is the factor informing on the condition of the environment and its impact on the operation of enterprises whereas the impact on the operation is the factor determining how enterprises operate in realities where there is no place for atomized actions of isolated enterprises and the impact of the environment and relationships with its constituents and all forms of inter-organizational and interpersonal relationships are of increasingly critical importance. The objective of the study is to analyze the perception of the environment in which modern small enterprises operate. The study question relating to this problem was formulated as follows: 1) what is the perception of the environment by the entrepreneurs representing small enterprises? 2) Is the environment of small enterprises perceived as unfriendly (dynamically changing, hostile, heterogeneous) by them? The research tool was the questionnaire. The statistical analyses were conducted using the R Package. While summing up the results of the conducted research, it should be concluded that, in most studies in the field of management of modern enterprises, a frequent observation is defining the environment as turbulent or ultrafast. The perception of the entrepreneurs under research indicates, however, a slightly different, more lenient approach to the environment. Although they were not directly asked about the level of turbulence of the environment, the obtained results, maintaining the characteristics of the environment in the middle of the scales (dynamism, hostility, heterogeneity) indicate that this environment is not perceived in a drastic and pessimistic manner.
Environmental Management
A. Prabowo; R.N. Hayati; S. Minarsih; B. Haryanto; D.D. Ludfiani; A. Supriyo; S. Subiharta; E. Nurwahyuni; Y. Hindarwati; M.N. Setiapermas; S. Sudarto; S. Samijan; B. Utomo; E. Winarn; N.D. Suretno; W. Wibawa; S. Agustini; A. Prasetyo; F.R.P. Hantoro; W. Hariyanto; V.E. Aristya
Abstract
BACKGROUND AND OBJECTIVES: Sorghum is a grain-producing commodity with the seeds being a food source, while the leaves, stems, and bran serve as animal feed. The productivity depends on the specific variety, environment, infrastructure, and technology used. Sorghum cultivation in Indonesia is carried ...
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BACKGROUND AND OBJECTIVES: Sorghum is a grain-producing commodity with the seeds being a food source, while the leaves, stems, and bran serve as animal feed. The productivity depends on the specific variety, environment, infrastructure, and technology used. Sorghum cultivation in Indonesia is carried out primarily using agroforestry or monoculture. Despite not being as popular compared to rice and corn due to the prevalence of these staples in Indonesian diets, sorghum has the potential to replace corn because its cultivation is easier and the results are more profitable. Therefore, this study aimed to determine sustainability index and potential of sorghum for food and feed by identifying dimensions and attributes that influence sustainability.METHODS: This study was conducted at Raji, Demak, Central Java, Indonesia in 2023. Data were collected through focus group discussions and structural questionnaires consisting of 28 attributes associated with environmental, social, economic, and technological dimensions. Multidimensional scaling method and Rapfish software were used for data analysis. Monte Carlo analysis was used to ascertain sustainability level and attributes leverage, as well as check errors and variations in assessment.FINDINGS: The results showed that sustainability index of sorghum for food and feed was 79.67, categorized as very sustainable. Analysis across four dimensions showed that the social dimension had the highest (83.80) sustainability index, followed by the technological (82.28), economical (77.46), and environmental (75.15) dimensions. A total of 12 attributes were found to greatly affect sustainability. These included land availability, the efficiency of water used, the prevention of natural resource exploitation, motivation level, minimal interference with primary agricultural activities, community acceptance, productivity, sales profit level, ease of sale and cultivation, tools availability, and technological sensitivity.CONCLUSION: Sustainability index of sorghum for food and feed was categorized as very sustainable with a value of 79.67. This index consisted of the environmental (75.15), social (83.80), economical (77.46), and technological dimensions (82.28). The average productivity at the study site was 6-7 tons per hectare, with a production potency of 300-350 tons per year. Additionally, the potency of sorghum stover production was 471.8 ton per year of dry matter and could be used as feed for 163 animal units per year
Environmental Management
D.P. Darmawan; G.M.K. Arisena; A.A.A.W.S. Djelantik; A.A.K. Krisnandika; N.L.M.I.M. Dewi; N.T. Lukpitasari Korri; N.M.C. Sukendar
Abstract
BACKGROUND AND OBJECTIVES: The high need for tourism-supporting infrastructure has impacted the increasing conversion of land functions in Denpasar City, Indonesia. The lack of agricultural areas in Denpasar City has motivated farmers to continue farming. Farmer motivation to do farming will collide ...
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BACKGROUND AND OBJECTIVES: The high need for tourism-supporting infrastructure has impacted the increasing conversion of land functions in Denpasar City, Indonesia. The lack of agricultural areas in Denpasar City has motivated farmers to continue farming. Farmer motivation to do farming will collide with obstacles in carrying out agricultural activities in Denpasar City. The purpose of this study was to examine the motivations and obstacles faced by farmers in carrying out agricultural activities. This research is relevant to the journal scope of Sustainable Agriculture Management, Urban, and Built Environmental Management.METHODS: This study was carried out in Denpasar City in Indonesia, where each sub-district in Denpasar City will be selected by one Subak. The selection of Subak was based on the Subak with the most farmers in each sub-district in Denpasar City. The selected subak were Pakel 1 Subak, Kerdung Subak, Temaga Subak, and Margaya Subak. The population in this study was 672 people. The respondents in this study were 87 people. The data collection method was carried out using structured and in-depth interviews using questions and points while face-to-face between the interviewer and the respondent, via a prepared questionnaire. This study uses two variables with 41 indicators. The analytical methods used to point to objectives one, two, and three are descriptive quantitative and descriptive qualitative methods. Goal four is “Build a model for dealing with obstacles to farming in urban areas.” The fourth objective was analyzed descriptive qualitative based on the results of the analysis of objectives one, two, and three.FINDINGS: The study results show that the motivation to continue farming is caused by demands to work, not having another job to get help from other parties, a healthy work environment, the ability to take lessons from previous farming experience affect product quality, and work in nature. The obstacles for farmers to continue farming are the bargaining position of farmers in selling products, market information obtained by farmers is still minimal, and market absorption of the products produced is not maximized.CONCLUSION: Based on the results of the research, several things deserve to be concluded. The number of dependents of a farming family is more than six because there are still children of farmers already working but still being supported by their parents for their primary needs, and most of the farmers do farming in an area of 0.21 – 0.60 hectares. The motivation to keep farming is caused by the demands to work, not having another job to get help from other parties, a healthy work environment, and the ability to take lessons from the previous farming experience affecting product quality and work in nature. The obstacles for farmers to continue farming are the bargaining position of farmers in selling products, market information obtained by farmers is still minimal, and market absorption of the products produced is not maximized.
Environmental Management
Allaily .; A.D. Santoso; M.N. Rofiq; N.A. Sasongko; H. Daulay; E.I. Wiloso; E. Widjaja; B.N. Utomo; A.I. Yanuar; S. Suryani; Y.P. Erlambang; U.N. Thiyas; D. Iskandar; A. Anhar; M. Rahmawati; T. Simamora; Y. Yusriani; G. Maghfirah; M. Ammar
Abstract
BACKGROUND AND OBJECTIVES: Sago plant is a valuable source of raw material for the processing industry and every part is very useful for food and shelter. Moreover, by-products of the Sago processing industry are useful as animal feed and liquid waste which has not been widely used. There are limited ...
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BACKGROUND AND OBJECTIVES: Sago plant is a valuable source of raw material for the processing industry and every part is very useful for food and shelter. Moreover, by-products of the Sago processing industry are useful as animal feed and liquid waste which has not been widely used. There are limited studies on the use of Sago by-products and sustainability of Sago palm smallholder industry. Therefore, this study aimed to assess sustainability of Sago palm smallholder industry in Simeulue Regency and identify the values of each attribute in the four impacting dimensions.METHODS: This study was carried out through the direct interview method, using a questionnaire containing 35 attributes related to 4 dimensions, namely 8 attributes of economy, 12 environmental, 10 social, and 5 technological. The data were obtained from 5 entrepreneurs of Sago palm smallholder industry in Simeulue Regency, out of a total of 7 active Sago processing factories. Subsequently, the data were analyzed using Multidimensional Scaling method with rapid appraisal software. Sustainability status and leverage attributes were analyzed by Monte Carlo analysis and alternating least-squares algorithm.FINDINGS: The results showed that the general sustainability indicators in Sago palm smallholder industry had an average value of 46.03 percent. This assessment was based on the value for the economic dimension of 45.56 percent, environmental dimension of 27.89 percent, social dimension of 55.65 percent, and technological dimension of 55.03 percent. Furthermore, it was found that techniques in several processing stages or use of liquid waste, cultivation skills, and technology process contributed to sustainable development. This study provided information that production factors needed to be improved for sustainability of Sago palm smallholder industry in terms of economy and environment. However, the use of solid and liquid wastes had not been optimally used.CONCLUSION: In the economic dimension, an improvement in production factors such as the cultivation of Sago plant is important because it only relies on plant that live naturally. Furthermore, it is important to increase the use of Sago pulp as animal feed to improve the substitution of commercial rations usage, and facilitate sustainability value of the economic dimension. Meanwhile, in the environmental dimension, there should be study and socialization on the processing or use of liquid waste. This can help in addressing air and water pollution. In the social and technological dimensions, Sago farmers need to be equipped with cultivation skills to increase the value of this dimension. In conclusion, Sago palm smallholder industry in Simeulue Regency needs to be facilitated from upstream to downstream and sustain plant cultivation, and process Sago commodities using technology while suppressing negative effects on the environment.
Environmental Engineering
M. Samimi
Abstract
BACKGROUND AND OBJECTIVES: Industrial wastewater usually contains metal ions which are hazardous to human and aquatic organisms. Nowadays, the application of inexpensive biomaterials in adsorptive removal of metal ions, such as plant biomass, has been widely considered. In this study, the efficiency ...
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BACKGROUND AND OBJECTIVES: Industrial wastewater usually contains metal ions which are hazardous to human and aquatic organisms. Nowadays, the application of inexpensive biomaterials in adsorptive removal of metal ions, such as plant biomass, has been widely considered. In this study, the efficiency of Eucalyptus globulus fruit biomass for biological adsorption of cadmium ions from aquatic environments has been evaluated.METHODS: After drying, the collected biosorbent was ground and powdered. The dried biomass, after screening with particle size of less than 45 micrometers, was used in all experiments. The effects of operating factors, such as biosorbent to cadmium ratio, pH value of the solution and residence time of biomass and metal, on the amount of analyte adsorption were evaluated by response surface methodology. The optimum conditions for maximum metal uptake by Eucalyptus globulus fruit biomass were also evaluated using the Box-Behnken Design model. Kinetic studies were statistically described to investigate the metal adsorption process.FINDINGS: Validation experiments showed the accuracy of the model proposed for determining the optimum conditions for the cadmium biosorption process. Based on the experimental data, the values of coefficient of determination, adjusted coefficient and predicted coefficient used in the model were determined as 0.9948, 0.9855 and 0.9245, respectively. Using the model, the maximum cadmium ion adsorption by biomass was obtained at 93.65 percent, biosorbent-to-metal ratio of 9:1, pH value of 6, and contact time of 80 minutes.CONCLUSION: In the present study, the Eucalyptus globulus fruit biomass, under optimal operating conditions, proved to be an efficient sorbent for cadmium uptake from aqueous environments. The results from the experimental data of the adsorption studies were consistent with pseudo-second-order kinetics (maximum capacity of 128.2 milligram per gram), indicating that the chemical adsorption of cadmium on the used biomass occurring in monolayers.
Environmental Management
K. Trostianska; I. Semencha; M. Yerina
Abstract
The local community is a complex socio-economic system, and its ability to function for an indefinitely long period of time (viability) is not investigated sufficiently today. The purpose of the research was, using the cognitive mapping, propose to the local community management developing their own ...
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The local community is a complex socio-economic system, and its ability to function for an indefinitely long period of time (viability) is not investigated sufficiently today. The purpose of the research was, using the cognitive mapping, propose to the local community management developing their own management strategies to ensure its viability. Considering the weakly structured subject area of resource management for the viability of the local community and the complex dynamic nature of socio-economic processes, fuzzy cognitive reflection was suggested as a tool that provides opportunities for modeling the inherent complexity and uncertainty associated with socio-economic systems. This research shows a system of relations between concepts in the form of a causative network – a cognitive map of the resource management of a local community and proposes scales for measuring the concepts. During the simulation experiments, managed, indirectly managed and unmanaged resources for the viability of a local community were defined. In modeling, own income per inhabitant has been chosen as the target concept and as an indicator of the potential of an independent choice of direction for the development of the local community with the view toward the construction of resource management scenarios for the local community's viability. As a result of the simulation, there were proposed some strategies for the growth of ‘own income per inhabitant’ and some recommendations were given for building management scenarios within these strategies.
Environmental Engineering
E.S. Siregar; S.U. Sentosa; A. Satrianto
Abstract
BACKGROUND AND OBJECTIVES: This study aims to examine the endogenous variable, low-carbon development, and valuate its influencing factors, given its pivotal role in environmental protection amid climate change concerns and economic growth. Low carbon development is a new platform to maintain economic ...
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BACKGROUND AND OBJECTIVES: This study aims to examine the endogenous variable, low-carbon development, and valuate its influencing factors, given its pivotal role in environmental protection amid climate change concerns and economic growth. Low carbon development is a new platform to maintain economic growth through reducing carbon emissions and reducing the use of natural resources, because it was predicted that reducing emissions will increase economic growth while preventing forest loss, improving air quality and living standards, and reducing mortality rates.METHODS: Utilizing a quantitative method, this study integrates a novel viewpoint by combining low-carbon development with related emission factors. The study utilizes secondary data, specifically time series data spanning 31 years from 1991 to 2021, which were analyzed using regression study methods. The factors being examined include capital formation, deforestation, land transportation, agricultural land, and industrialization.FINDINGS: Findings reveal that low-carbon development in North Sumatra is influenced significantly by capital formation, deforestation, agricultural land, and industrialization, with land transportation showing no substantial impact. Capital formation has a favorable impact on low-carbon development. But, deforestation, land transportation, agricultural land and industrialization have a negative impact on low-carbon development. Together, these determinants account for 77.55 percent of the variance. Capital formation contributes 19.8 percent, deforestation 15.6 percent, agricultural land 19.0 percent, and industrialization 18.9 percent to low-carbon development.CONCLUSION: The hypothesis established in this study is accepted. To foster low-carbon development in North Sumatra, specific attention is required from local governments. Capital formation is vital. Measures include controlling interest rates, supporting businesses, fostering an investment-friendly climate, ensuring security, and integrating environmental sustainability considerations into project implementation to curb carbon emissions. Prevention of deforestation involves tightening land clearance licenses and enhancing institutional quality through environmental protection and property rights legislation. The government must strive for promoting eco-friendly agricultural practices with mitigated through outreach programs involving experts who educate farmers on minimizing emissions, reducing carbon emissions from pesticide with using biochar sourced from empty palm fruit bunches and also rice straw which is very easy to obtain at a low cost and is environmentally friendly, and emphasizing environmental preservation policies in the industrial sector like industrial transformation efforts with an effective approach to reducing carbon emissions such as restructuring various aspects of industrial activities, including investment, final demand, intensity and production methods. The implementation of tax emissions and strategic interventions increases the likelihood of realizing low-carbon development in North Sumatra, aligning with sustainable development goals.
Environmental Management
. Nurliza
Abstract
BACKGROUND AND OBJECTIVES: Indonesia is the second largest natural rubber producer, which it gets primarily from smallholders. However, smallholders are less and less competitive because of unsustainable agricultural practices, while there is huge potential for sustainable natural rubber. This study ...
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BACKGROUND AND OBJECTIVES: Indonesia is the second largest natural rubber producer, which it gets primarily from smallholders. However, smallholders are less and less competitive because of unsustainable agricultural practices, while there is huge potential for sustainable natural rubber. This study aimed to measure the effect of income and smallholder characteristics on cultivation, harvesting, and post-harvest management.METHODS: Mixed methods with non-probability sampling were used for 100 natural rubber smallholders in Kapuas Hulu Regency, West Kalimantan, Indonesia, one of the regional centers of Indonesian natural rubber. Partial least square path modeling was used with SmartPLS software to estimate the complex cause-effect relationships of smallholder and farm factors for adopting sustainable agricultural practices.FINDINGS: The effect of the relationship between income and smallholder characteristics on cultivation and income on post-harvest management was not significant. Age and education affected some harvesting parameters, such as tapping knives, bamboo and clean latex collection, and latex stimulus risk, and some post-harvest parameters, such as a risk of acid coagulation and storage. The worker's income source, based on off-farm, on-farm, or non-farm activities, affected harvesting parameters, including tapping knives, bamboo and clean latex collection, and latex stimulus risk. CONCLUSION: This study offers empirical evidence for sustainable agriculture management. The acceptance of sustainable cultivation and management of rubber practices uses smallholder and farm factors as constraints since they do not form a homogenous group, and the theory of planned behavior failed to provide an effective way to explain the behaviors. Good agricultural practices must be used at all steps, including cultivation, harvesting, and post-harvest management, to prevent problems.
Environmental Engineering
S. Sinworn; N. Viriyawattana
Abstract
BACKGROUND AND OBJECTIVES: The fishery workers are affected by the noise produced by motorboats, which is caused by long-term (more than 7 hours per day), exposure to high frequencies and hazardous noise levels. The detrimental impact of the loud noise emitted by small boat engines affects the hearing ...
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BACKGROUND AND OBJECTIVES: The fishery workers are affected by the noise produced by motorboats, which is caused by long-term (more than 7 hours per day), exposure to high frequencies and hazardous noise levels. The detrimental impact of the loud noise emitted by small boat engines affects the hearing abilities of fishermen in Thailand has been well-documented. In light of this, the primary aim of the present study was to assess the potential hazards associated with noise exposure and develop an effective silencer that can effectively mitigate the noise generated by fishing boats. The study was conducted in Songkhla Lake, located in Thailand, providing a suitable setting for the current study.METHODS: During an 8-hour work period, 300 sample fishers were monitored using sound-level and noise-dose meters. Their response to noise was evaluated through an audiometry test and a questionnaire. Furthermore, a silencer was engineered to decrease the noise emissions from boat engines. Utilizing the solid work technique, the exhaust silencer was designed based on a model of the internal exhaust pressure. The sound level at the end of the exhaust silencer pipe was determined by employing a sound meter and recording it at a speed of 4,000 revolutions per minute. The designed silencer was installed on the exhaust pipe of the boat engine to align with the current operation of the engine. The objective was to measure the variation in noise levels before and after the installation of the silencer. The sound level meter of type I, equipped with a weighted circuit incorporating an A network (weight A), closely resembles the auditory response of the human ear to sound. Prior to assessing the noise produced by the engine, it was ensured that the engine had been running for a minimum of 5 minutes. The sound level of the small boat's engine was then measured using a type I sound-level meter positioned at a 45-degree angle behind the engine, and at a distance of 0.5 meter.FINDINGS: The results indicated that evaluating the risks associated with being exposed to high levels of noise from boat engines had an impact on the auditory capacity of fishermen. The right ear was more severely damaged than the left at frequencies of 6,000 (23 people) and 8,000 (20 people) Hertz at sound levels of 85 decibels A and above. This data is valuable for the development of a silencer aimed at mitigating sound pressure levels that impact the loudness of sound across different frequency levels, considering a boat engine's maximum acceleration of 4,000 revolutions per minute through the application of solid design principles. Subsequently, the silencer will be tested on Thai fishermen who are regularly exposed to noise, demonstrating a reduction in engine noise of over 23 decibels A within the frequency range of 100 to 10,000 Hertz.CONCLUSION: The auditory abilities of fishermen are adversely impacted by the intensity and high pitch of the noise emitted by small boat engines. The solid design technique is employed to create a silencer for a boat engine with a maximum acceleration of 4000 revolutions per minute, operating at frequency levels of 2000, 3,000, 4,000, 6,000, and 8,000 Hertz. Exposure to loud noise can pose a significant risk to the hearing health of fishermen. However, their safety can be ensured by implementing effective measures to reduce the loudness by more than 23-42 decibel A. By employing such work practices, the noise levels experienced by fishermen can be kept below the hazardous threshold of > 85 decibels A.
Environmental Science
D. Hermanto; N. Ismillayli; H. Muliasari; R. Wirawan; S.R. Kamali
Abstract
BACKGROUND AND OBJECTIVES: To address the potential harm caused by the intensive use of pesticides in pest control in agriculture, there is a need for accurate and efficient methods to detect and monitor pesticide residues. Therefore, this study aimed to develop a biosensor that can detect organophosphate ...
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BACKGROUND AND OBJECTIVES: To address the potential harm caused by the intensive use of pesticides in pest control in agriculture, there is a need for accurate and efficient methods to detect and monitor pesticide residues. Therefore, this study aimed to develop a biosensor that can detect organophosphate pesticides highly toxic to humans and the environment. METHODS: Biosensor organophosphate pesticides using a single film containing acetylcholinesterase/choline oxidase have been designed using silver-based plasmonic nanoparticles as a colorimetric indicator. In the presence of acetylcholinesterase, acetylcholine is hydrolyzed to choline and acetic acid, then choline oxidase catalyzes the oxidation of choline to hydrogen peroxide and betaine. Hydrogen peroxide reacts with the silver nanoparticles, and the discoloration of the brown solution occurs due to the oxidation of silver+.FINDINGS: As a biosensor indicator, silver nanoparticles were extremely accurate, sensitive, and stable over a long period of storage. Transmission Electron Microscope images confirmed the reduction in size of nanoparticles from 16.82 ± 4.36 to 9.63 ± 2.29 nanometers. The analyte profenofos, one of the organophosphate pesticides, inhibits the activity of acetylcholinesterase, thereby reducing the concentration decrease of silver nanoparticles by releasing less hydrogen peroxide. Optimum conditions for biosensors were achieved with a potential of Hydrogen of 7, buffer, and acetylcholinesterase concentrations of 7 and 70 millimolar, respectively, with an incubation time of 5 minutes. Biosensor response showed a linear range at profenofos concentrations of 0.05-2.00 milligrams per liter, with limits of detection and quantization of 0.04 and 0.13 milligrams/liter, respectively. Biosensor also has excellent sensitivity, reproducibility, and stability, with a Relative Standard Deviation of 2.5 percent and a stable response of up to 4 months. Subsequently, using a biosensor in the chilli as a sample resulted in a profonefos level of 0.04 milligrams per liter, making it safe for consumption. CONCLUSION: Biosensor measurement outcome aligned with the gas chromatography-mass spectrometry result, which is the accepted standard method for detecting profenofos. Additionally, the proposed biosensor offers several advantages such as ease of use, fast, low-cost, and on-site analysis. Hence, this method is suitable for monitoring and controlling pesticide residues, particularly organophosphate, in agricultural products and the environment.
Environmental Management
N. Davidenko; H. Skrypnyk; Z. Titenko; O.V. Zhovnirenko
Abstract
The purpose of the article is the establishment of the tightness of the connection between the various sources of financing and the introduction of innovations at enterprises. In the process of research such scientific methods have been used: modeling – to determine the influence of the source ...
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The purpose of the article is the establishment of the tightness of the connection between the various sources of financing and the introduction of innovations at enterprises. In the process of research such scientific methods have been used: modeling – to determine the influence of the source of funding for innovation activities, on the number of new technological processes introduced and the introduction of new types of products; economic-statistical – to evaluate the dynamics of the amount of realized innovative products and the index of the efficiency of innovation costs; correlation-regression analysis – to determine the relationship density and the relationship between factors of influence and performance indicators; abstract-logical – for the implementation of theoretical and methodological generalizations. The results of the research – analyzed the connection of the indexes of dynamics of sources of financing of innovation activity and the amount of implemented new technological processes and development of new types of products for 2011-2017. The influence of the most significant sources of financing on the amount of innovations is described. Further development of methodological and practical aspects of the dependence of the amount of implemented innovative products and the index of the efficiency of innovation costs, using multiple regression models, has been found for the establishment of the influence of system-based economic indexes. The practical significance of the obtained results is to determine the optimal level of financial support for innovation activity of enterprises, which will allow predicting the growth of innovative processes in the country in the short and medium term.
Environmental Science
F.M. Sahami; S.N. Hamzah; A.H. Tome; S.A. Habibie; M.R.U. Puluhulawa
Abstract
BACKGROUND AND OBJECTIVES: Nike fish are a postlarvae group of gobies found in the Gobiidae and Eleotridae families. These fish are a seasonal delicacy in Gorontalo, with significant economic value and popularity among the community. Data from 2020 to 2021 showed a downward trend in Nike fish production ...
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BACKGROUND AND OBJECTIVES: Nike fish are a postlarvae group of gobies found in the Gobiidae and Eleotridae families. These fish are a seasonal delicacy in Gorontalo, with significant economic value and popularity among the community. Data from 2020 to 2021 showed a downward trend in Nike fish production in Gorontalo City despite ongoing efforts to promote it as a consumable fish. Therefore, this study assessed the sustainability status of Nike fish in the waters of Tomini Bay Gorontalo.METHODS: This study was conducted across five Nike fishing locations in Tomini Bay, Gorontalo Province, namely the Bone-Bolango, Bilungala, Tombulilato, Taludaa, and Bilato estuaries, from April to September 2023. Data were collected through interviews with 109 Nike fishers and four experts from government agencies in Gorontalo Province. Meanwhile, other supporting data were obtained from various references that support the study objectives. The sustainability status analysis was conducted using rapid appraisal for fisheries, a software with an assessment method comprising five dimensions, ecological, economic, social, ethical, and technological, which are analyzed multi-dimensionally.FINDINGS: The results showed that of the five dimensions analyzed, only one, the technological dimension, exhibited sustainability. Meanwhile, the other four dimensions, including ecology, economic, social, and ethical, showed a less sustainable status. Some attributes that significantly affected the sustainability of Nike fish resource use in the waters of Tomini Bay, Gorontalo, include fishing location, Nike diversity, by-products, profit distribution, contribution to regional revenue, dependence on subsidies, level of conflict, the role of fishermen in terms of sustainability, fish landing sites, handling on board, externalities (waste disposal), and the level of violations. The results of the multi-dimensional scaling analysis showed that the average index values of the ecological, economic, social, and ethical dimensions are 33.53, 40.33, 30.86, and 25.19, respectively, demonstrating a less sustainable status. Meanwhile, only one of the five dimensions studied has an index value of more than 50—the technological dimension. The multi-dimensional scaling index value of the technology dimension is 84.09, demonstrating its sustainable status. The stress value (0.14 to 0.15) and the coefficient of determination (0.91 to 0.94) in the multi-dimensional scaling calculation showed that the analysis carried out was appropriate.CONCLUSION: The sustainability status of Nike fish in the waters of Tomini Bay, Gorontalo, is less sustainable and highly dependent on the environmental factors that support their life as amphidromous fish. The involvement of all stakeholder elements in implementing sustainable practices is also essential in terms of supporting sustainability. Therefore, this study provided important contributions that can be used by local governments and stakeholders to form appropriate management policies to ensure sustainability in the future. This study can provide information or insights for countries that have fishery potential similar to the waters of Tomini Bay, Gorontalo, to carry out better fisheries management.
Environmental Management
A. Abubakar; H. Yusuf; M. Syukri; R. Nasution; M. Yusuf; R. Idroes
Abstract
BACKGROUND AND OBJECTIVES: Medicinal plants growing in geothermal areas have been reported to possess relatively high concentrations of bioactive secondary metabolites, which have been attributed to the adaptive heat stress response. Nonetheless, the exploitation of their medicinal benefits is limited ...
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BACKGROUND AND OBJECTIVES: Medicinal plants growing in geothermal areas have been reported to possess relatively high concentrations of bioactive secondary metabolites, which have been attributed to the adaptive heat stress response. Nonetheless, the exploitation of their medicinal benefits is limited by potentially life-threatening concentrations of heavy metals. Chromolaena odorata Linn, also called seurapoh, is a well-known medicinal plant that can absorb and accumulate heavy metals from the soil. This present study aimed to investigate the contents of mercury, lead, cadmium, and arsenic in the ethanolic extract of Chromolaena odorata Linn leaves collected from a geothermal area in Aceh Province, Indonesia.METHODS: Three hot springs, namely Ie-Suum, Ie-Jue, and Ie-Brouk, located in the same geothermal area, Seulawah Agam, were selected as the sampling points, and three samples of Chromolaena odorata were collected at each point. Extraction was carried out by means of maceration employing ethanol solvent. The heavy metal contents of each extract were determined using priorly validated atomic absorption spectrometry and graphite furnace atomic absorption spectrometry. The maximum thresholds of each heavy metal from the Indonesian Agency for Drug and Food Control were adopted during data interpretation.FINDINGS: The results revealed the presence of trace levels of arsenic (0.0482 ± 0.004 – 0.0639 ± 0.007 milligram per kilogram) and lead (0.0219 ± 0.004 – 0.0672 ± 0.006 milligram per kilogram), which did not exceed Indonesian maximum safety thresholds (≤5 and ≤10 milligram per kilogram, respectively). Mercury in all samples was not observable (limit of detection = 0.018 milligram per liter). Cadmium was observed in almost all samples with a concentration range of 0.0219 ± 0.005–1.1472 ± 0.006 milligram per kilogram, which exceeded the maximum threshold (0.3 milligram per liter).CONCLUSION: Heavy metal contamination in the ethanolic extract of geothermal Chromolaena odorata leaves has been attributed to volcanic activities. Among the heavy metals of concern, cadmium was the only one with a concentration exceeding the safety limit. The presence of cadmium in the extract at a high concentration could cause its translocation to the human body, eventually leading to multiple organ damage. Therefore, the extract of Chromolaena odorata leaves collected from a geothermal area should be consumed with caution for possible cadmium intoxication.
Environmental Management
N. Andriyani; P. Suprobo; T.J.W. Adi; W.A.N. Aspar; A.D. Jatmiko; A.D. Santoso
Abstract
BACKGROUND AND OBJECTIVES: The conventional disposal of demolition waste in landfills poses significant ecological harm. Integrating principles of the circular economy can help alleviate this impact by encouraging the reuse, recycling, and recovery of materials. This study presents a groundbreaking approach ...
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BACKGROUND AND OBJECTIVES: The conventional disposal of demolition waste in landfills poses significant ecological harm. Integrating principles of the circular economy can help alleviate this impact by encouraging the reuse, recycling, and recovery of materials. This study presents a groundbreaking approach to demolition that aims to tackle the growing waste problem and bridge the existing regulatory loopholes. The framework leverages Building Information Modeling for Just-In-Time delivery and circular economy practices to prioritize environmentally friendly, efficient, and sustainable operations. The framework aims to transform demolition practices, reduce environmental impact, and promote sustainability within the construction sector by incorporating these principles.METHODS: The study outlines a plan for demolishing high-rise buildings by incorporating Building Information Modeling, Just-In-Time delivery, and the circular economy in a specific case analysis. Autodesk Revit streamlines waste estimation and inventory of reusable, repairable, refurbished, and recyclable waste, thereby optimizing waste management planning with improved effectiveness and efficiency. Navisworks visualizes the demolition process in a reverse four-dimensional model. Microsoft Project ensures on-time delivery, while a Sankey diagram visually represents the concept of a circular economy.FINDINGS: Building information modeling, just-in-time delivery, and circular economy principles maximize demolition planning for efficiency, effectiveness, and sustainability. The green demolition framework serves as a valuable project management tool that enhances planning and resource allocation efficiency, all the while reducing environmental impact through the implementation of selective demolition and enhanced waste management practices.The process completed the demolition of a 6-story building in 88 days, producing 160 cubic meters of reusable waste, eight cubic meters of repairable and refurbishable waste, and 3,972 cubic meters of recyclable wasteThe waste collection for the circular economy is efficiently carried out within a timeframe of 1-2 days, thanks to the implementation of the Just-In-Time delivery schedule.CONCLUSION: This study delves into advancements in waste management and strategic demolition scheduling. The government should consider the green demolition framework when refining regulations to include Information Communication Technologies and circular economy concepts. Future studies have the potential to improve the green demolition framework by prioritizing environmentally conscious strategies and ensuring effective coordination among all stakeholders involved to achieve the best possible outcomes in demolition projects.
Environmental Science
I. Dewiyanti; D. Darmawi; Z.A. Muchlisin; T.Z. Helmi
Abstract
BACKGROUND AND OBJECTIVES: Soil is an essential abiotic component serving as a habitat for numerous organisms, including cellulolytic bacteria commonly found in mangrove ecosystems. This bacteria could produce active enzymes needed to improve environmental quality by accelerating the organic matter decomposition. ...
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BACKGROUND AND OBJECTIVES: Soil is an essential abiotic component serving as a habitat for numerous organisms, including cellulolytic bacteria commonly found in mangrove ecosystems. This bacteria could produce active enzymes needed to improve environmental quality by accelerating the organic matter decomposition. The unique mangrove environment may contain new types of cellulolytic bacteria with new characteristics. Despite several mangrove areas being explored as sources of cellulolytic bacteria, there is currently unexplored data on its diversity in Aceh Province, Indonesia. Accordingly, it is necessary to analyze the molecular biological approach, namely the 16 svedberg ribosomal ribonucleic acid gene, to identify the diversity of cellulolytic bacteria and analyze the phylogenetic relationships between them.METHODS: Bacteria isolates were collected from mangrove soil at six research locations with three replications. A purposive sampling method was applied to determine the research location. Isolates from soil samples were streaked and purified in carboxymethyl cellulose as selective media for cellulolytic bacteria. Molecular identification adopted 16 svedberg ribosomal ribonucleic acid gene sequencing, and the sequencing data were matched with GenBank data. Phylogenetic analysis and genetic distance between species were evaluated using molecular evolutionary genetics analysis.FINDINGS: Thirteen isolates were sequenced, and nine species of cellulolytic bacteria dominated by the Bacillus genus were identified. These species exhibited an identity value of 97.77-100 percent when compared to data from GenBank, and B. velezensis was found to have a close relationship with B. amyloliquefaciens at a value of 0.002 percent. Interestingly, the non-rehabilitated mangrove areas had more bacterial species than the rehabilitated ones. Two Bacillus genus had different nucleotide bases, proving they were distinct species.CONCLUSION: Nine cellulolytic bacteria species were identified; the two closely interspecies genetic distance related were B. velezensis and B. amyloliquefaciens, whereas the farthest were Bacillus sp1. and Bacillus sp2. Small genetic distances of interspecies indicate a close relationship between species. In comparing the two sampling sites, the non-rehabilitated mangrove contains higher bacterial cellulolytic species than the rehabilitated and Bacillus-dominated site. The findings provide valuable insights into the diversity of cellulolytic bacteria in mangrove ecosystems. The abundance of bacterial species could serve as sources of cellulase enzymes with different characteristics, essential in an environmental aquatic management.
Environmental Management
Z. Ostraszewska; A. Tylec
Abstract
Innovativeness, determining the development potential of enterprises and economies, and hence the economic welfare of societies, became an important area of interest for both theoreticians and especially economic life practitioners. Thus, in this study of the subject there can be found numerous definitions ...
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Innovativeness, determining the development potential of enterprises and economies, and hence the economic welfare of societies, became an important area of interest for both theoreticians and especially economic life practitioners. Thus, in this study of the subject there can be found numerous definitions and types of innovation, including environmental innovation, being a response to the demands of a modern economy, related to the need of combining innovativeness with care for the environment. The observed increase of interest in the idea of sustainable development, and often some kind of reorientation of enterprises towards the eco-innovative strategy, are associated with the perception of the eco-innovation as both a necessity and a chance for promotion and development. Despite this, only less than 1/3 of the countries belonging to the EU can be considered as innovative and eco-innovative at the same time. Poland still does not belong to these countries - on the map of the EU innovation Poland ranks among the so-called moderate innovators (with the SII index of 0.27 in 2017, while the EU index was 0.504). With the Eco-IS score equal to 59 the level of eco-innovativeness of the Polish economy is much below the EU average (Eco-IS = 100) – in 2017 Poland obtained 26th place out of 28 European Union countries. Given the above, this paper outlines the nature of eco-innovativeness with particular focus on the results recorded by Poland in this regard in comparison to the European Union.
Environmental Management
S. Amar; A. Satrianto; A. Ariusni; A. Ikhsan; E.S. Siregar
Abstract
BACKGROUND AND OBJECTIVES: This study aimed to analyze the influence of economic growth, industrialization, government spending, and environmental taxes on environmental quality as well as the influence of environmental quality, unemployment, and inflation on Indonesia’s economic growth. This condition ...
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BACKGROUND AND OBJECTIVES: This study aimed to analyze the influence of economic growth, industrialization, government spending, and environmental taxes on environmental quality as well as the influence of environmental quality, unemployment, and inflation on Indonesia’s economic growth. This condition is important to maintain environmentally friendly economic development to achieve sustainable development.METHODS: The study was conducted using simultaneous equation model analysis considering classical assumption tests such as normality tests, granger causality and heteroscedasticity. This study data began in 2015 to 2021 in 34 provinces in Indonesia. In this study, the determinants of environmental quality used were industrialization, government spending and environmental taxes, whereas those of economic growth were unemployment and inflation.FINDINGS: The results of the study indicate that economic growth, industrialization, government spending and environmental taxes have a significant effect on Indonesia’s environmental quality. Collectively, these determinants account for 22.18 percent of the variance. However, environmental quality and unemployment do not have a significant effect on Indonesia’s economic growth. Meanwhile, inflation has a significant effect on economic growth. Simultaneously, the influence of the determinants of economic growth is 33.52 percent.CONCLUSION: Economic growth, industrialization, government spending and environmental taxes have a significant influence on Indonesia’s environmental quality. On the other hand, environmental quality and unemployment do not have a significant effect on Indonesia’s economic growth. Meanwhile, inflation has a significant effect on economic growth. The policies suggested, include the following 1) the government must be able to maintain environmental quality while still encouraging economic growth, implemented by creating an environmentally sound growth concept or applying the green economic concept to harmonize growth and the environment; 2) the industrialization process must be maintained so that it does not damage the environment, and pollution threshold rules created in the industrialization process must be applied
Environmental Engineering
D.B. Aviantara; F. Suciati; G. Hadiko; N.S. Indrasti; M. Yani
Abstract
BACKGROUND AND OBJECTIVES: Polychlorinated biphenyls are pervasive contaminants that are receiving attention worldwide. Due to their well-known propensity to have harmful impacts on both humans and the environment, polychlorinated biphenyls have been internationally banned for use. In this study, dechlorination ...
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BACKGROUND AND OBJECTIVES: Polychlorinated biphenyls are pervasive contaminants that are receiving attention worldwide. Due to their well-known propensity to have harmful impacts on both humans and the environment, polychlorinated biphenyls have been internationally banned for use. In this study, dechlorination of five polychlorinated biphenyl congeners, 2,2′,5,5′-tetrachlorobiphenyl, 2,2′,4,5,5′-pentachlorobiphenyl, 2,2′,3,4,4′,5′-hexachlorobiphenyl, 2,2′,3,4,4′,5′-hexachlorobiphenyl, 2,2′,4,4′,5,5′-hexachlorobiphenyl, and 2,2′,3,4,4′,5,5′-heptachlorobiphenyl, are evaluated. The chlorines from polychlorinated biphenyl congeners were removed using a heterogeneous catalyst synthesized via microwave-assisted impregnation of zinc metal onto pulverized shrimp shell waste.METHODS: The five polychlorinated biphenyl congeners were dechlorinated through treatments combination of time (1–4 hours), heat (150–250 degree celsius), and catalyst proportion (1–5 percent weight/weight basis). The dechlorination trials followed the Box–Behnken experimental design and then analyzed using response surface methodology. Levels of the remaining polychlorinated biphenyl congeners were monitored by using a gas chromatograph equipped with an electron capture detector.FINDINGS: The results of the trials demonstrated that among the five polychlorinated biphenyl congeners, only 2,2′,3,4,4′,5,5′-heptachlorobiphenyl did not respond to the provided treatments. Three congeners, namely, 2,2′,5,5′-tetrachlorobiphenyl, 2,2′,4,5,5′-pentachlorobiphenyl, and 2,2′,4,4′,5,5′-hexachlorobiphenyl, showed positive response, and one congener 2,2′,3,4,4′,5′-hexachlorobiphenyl showed negative response to the provided treatments. These findings suggested that chlorine attached to the para position of the biphenyls ring was easier to remove. The efficiency calculation of total polychlorinated biphenyl concentrations after treatments was approximately 25 percent. Such a low degree of effectiveness may be caused by the catalyst becoming inactive, either chemically through the deposition of chlorines that have been removed from the biphenyl ring or mechanically by the leaching of zinc from the surface of the pulverized shrimp shell due to insufficient mechanical strength. Optimization via response surface methodology produced optimal results for dechlorination at 150 degree celcius for 2.4 hours with 5 percent additional catalyst.CONCLUSION: The total amount of polychlorinated biphenyls that remained after dechlorination was not significantly impacted by the treatment combination of temperature, duration, and weight of the catalyst. However, the treatments had significant effects on the chlorine removal at the para positions of the biphenyl ring. In this case 2,2′,5,5′-tetrachlorobiphenyl, 2,2′,4,5,5′-pentachlorobiphenyl, and 2,2′,4,4′,5,5′-hexachlorobiphenyl congeners have positive responses and 2,2′,3,4,4′,5′-hexachlorobiphenyl congener has a negative response. For polychlorinated biphenyl congeners having more than six chlorines, no chlorine removal was observed.
