The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, College of Environmental Science & Engineering, Guilin University of Technology, Guilin 541004, People’s Republic of China
Methylene blue is widely used in various industrial branches. Due to insufficient treatment, its occurrence in wastewater is frequently detected, which may result in serious environment problems to aquatic organisms. Hydroponic experiments were conducted with rice seedlings (Oryza sativa L. cv. XZX 45) exposed to methylene blue to determine the effective concentration using relative growth rate and water use efficiency as response endpoints. Results showed that acute toxicity of methylene blue to rice seedlings was evident. Although a linear decrease in relative growth rate and water use efficiency was observed in rice seedlings with increasing methylene blue concentrations, relative growth rate of rice seedlings was more sensitive to change of methylene blue than water use efficiency. Using non-linear regression, EC-48 h values for 10%, 20% and 50% inhibition of the relative growth rate were estimated to be 1.54, 3.22 and 10.13 mg MB/L for rice seedlings exposed to methylene blue, respectively, while smaller EC were obtained for 96 h exposure. In conclusion, the toxic response of young rice seedlings to methylene blue is obvious and inhibitory effects are highly dependent on response endpoints and the duration of exposure period.
Ahamd, A.; Rafatullah, M.; Sulaiman, O.; Ibrahim, M.H.; Hashim, R., (2009). Scavenging behaviour of meranti sawdust in the removal of methylene blue from aqueous solution. J. Hazard. Mater., (170): 357–365 ( 9 pages).
Banerjee, S.; Dastidar, M.G., (2005). Use of jute processing wastes for treatment of wastewater contaminated with dye and other organics. Bioresour. Technol., (96): 1919–1928 (10 pages).
Bulut,Y.; Aydm, H., (2006). A kinetics and thermodynamics study of methylene blue adsorption on wheat shells. Desalination, (194): 259–267(9 pages).
Ebbs, S.D.; Piccinin, R.C.; Goodger, J.Q.D.; Kolev, S.D.; Woodrow, I.E.; Baker, A.J.M., (2008). Transport of ferrocyanide by two eucalypt species and sorghum. Int. J. Phytorem.; (10): 343–357 (15 pages).
Hamdaoui, O., (2005). Batch study of liquid-phase adsorption of methylene blue using cedar sawdust and crushed brick. J. Hazard. Mater. (B135): 264–273 (10 pages).
Hajjaji, M.; Alami, A.; Bouadili, A.E., (2006). Removal of methylene blue from aqueous solution by fibrous clay minerals. J. Hazard. Mater. (B135): 188–192 (5 pages).
Larcher, W., (1995). Physiological plant ecology, 3d ed. Springer, Berlin
Murugesan, K.; Dhamija, A.; In-Hyun, N.; Young, M.; Yoon-Seok, C., (2007). Decolourization of reactive black 5 by laccase: optimization by response surface methodology. Dyes Pigments. (75): 176–184 (9 pages).
Nasuha, N.; Hameed, B.H.; Moha-Din, A.T., (2010). Rejected tea as a potential low-cost adsorbent for the removal of methylene blue. J. Hazard. Mater. (175): 126–132 (7 pages).
Sauer, T.; Cesconeto Neto, G.; Jose, H.J.; Moreira, R.F.P.M., (2002). Kinetics of photocatalytic degradation of reactive dyes in a TiO2 slurry reactor. J. Photochem. Photobiol. A., (149): 147–154 (8 pages).
Senthilkumaar, S.; Porkodi, K.; Vidyalaksmi, R., (2005a). Photodegradation of a textile dye catalyzed by sol-gel derived nanocrystalline TiO2 via ultrasonic irradiation. J. Photochem. Photobiol. A., (170):225–232 (8 pages).
Senthilkumaar, S.; Varadarajan, P.R.; Porkodi, K.; Subbhuraam, C.V., (2005b). Adsorption of methylene blue onto jute fiber carbon: kinetics and equilibrium studies. J. Colloid Interf. Sci., (284): 78–82 (5 pages).
Tan, I.A.W.; Ahmad, A.; Hameed, B.H., (2008). Adsorption of basic dye using activated carbon prepared from oil palm shell: batch and fixed bed studies. Desalination, (225):13–28 (16 pages).
Trapp, S.; Zambrano, K.C.; Kusk, K.O.; Karlson, U., (2000). A phytotoxicity test using transpiration of willows. Arch. Environ. Contam. Toxicol., (39):154–160 (7 pages).
Vadivelan, V.; Kumar, .K.V., (2005). Equilibrium, kinetics, mechanism, and process design for the sorption of methylene blue onto rice husk. J. Colloid Interf. Sci., (286): 90–100 (11 pages).
Yu, X.Z.; Trapp, S.; Zhou, P.H.; Peng, X.Y.; Cao, X., (2006). Response of weeping willows to linear alkylbenzene sulfonate. Chemosphere, (64): 43–48 (6 pages).
Yu, X.Z.; Zhang, F.Z., (2013). Effects of exogenous thiocyanate on mineral nutrients, antioxidative responses and free amino acids in rice seedlings. Ecotoxicology, (22): 752–760 (9 pages).
Yu, X.Z.; Zhang, X.H.; Yue, D.M., (2014). Alternation of antioxidative enzyme gene expression in rice seedlings exposed to methylene blue. Environ. Sci. Pollut. Res., (21): 14014–14022 (9 pages).
Article View: 2,022
PDF Download: 1,223
Letters to Editor
GJESM welcomes letters to the editor. Letters pertaining to manuscript published in GJESM should be sent to the editorial office of GJESM within three months of either online publication or before printed publication, except for critiques of original research. Following points are to be considering before sending the letters (comments) to the editor.
 Letters that include statements of statistics, facts, research, or theories should include appropriate references, although more than three are discouraged.
 Letters that are personal attacks on an author rather than thoughtful criticism of the author’s ideas will not be considered for publication.
 Letters can be no more than 300 words in length.
 Letter writers should include a statement at the beginning of the letter stating that it is being submitted either for publication or not.
 Anonymous letters will not be considered.
 Letter writers must include their city and state of residence or work.
 Letters will be edited for clarity and length.