Document Type : REVIEW PAPER
1 University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka
2 Nagaoka National Institute of Technology, Nishikatakai, Nagaoka, Niigata, Japan
3 Ichinoseki National Institute of Technology, Takanashi, Hagisho, Ichinoseki, Iwate, Japan
Natural waterways are contaminated due to industrialization, urbanization, population growth etc., degrading their quality. Contaminated waterways cause numerous health and environmental hazards. Therefore, it is imperative to remove contaminants. Coagulation is one of the efficient primary chemical treatment methods that could be used to treat such contaminants. Natural coagulants have gained popularity in the water and wastewater treatment industry due to their advantage over chemical coagulants. Natural coagulants are derived from either plants, animals, or microorganisms. This study has elaborated on the nature and mechanisms, and types of natural coagulants. In this review work, many studies have proposed several types of natural coagulants. However, plant-based natural coagulants extracted from different plant components have been extensively discussed and compared based on their application and efficiency in water and waste treatment. The primary purpose of this review is to refine the knowledge on the potential use and optimization of the effectiveness of eco-friendly and sustainable natural coagulants. Besides, the development efforts and the barriers reported by recent findings for the commercialization of natural coagulants are also discussed. Further, few modified natural coagulants have also been presented for exploring the other possible approaches to promote their usage in water and wastewater treatment in the future studies.
- Natural coagulants have been studied as an eco-friendly alternative for chemical coagulants;
- Moringa olerifera, Chitosan, Tannins, and Nirmali seeds, have been proven as effective coagulants for reduction of turbidity, COD and TSS etc.;
- Natural coagulants have not yet been used in large scale commercial applications;
- Natural coagulants can be used in conjunction with modifying agents.
©2022 The author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit: http://creativecommons.org/licenses/by/4.0/
GJESM Publisher remains neutral with regard to jurisdictional claims in published maps and institutional affliations.
Citation Metrics & Captures
Google Scholar | Scopus | Web of Science | PlumX Metrics | Altmetrics | Mendeley |
Letters to 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.
Send comment about this article