Chitosan for coagulation/flocculation processes – An eco-friendly approach

Chitosan is a partially deacetylated polymer obtained from the alkaline deacetylation of chitin, a biopolymer extracted from shellfish sources. Chitosan exhibits a variety of physico-chemical and biological properties resulting in numerous applications in fields such as cosmetics, biomedical enginee...

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Bibliographic Details
Published in:European polymer journal 2009-05, Vol.45 (5), p.1337-1348
Main Authors: Renault, F., Sancey, B., Badot, P.-M., Crini, G.
Format: Article
Language:English
Subjects:
Applied sciences
Bioflocculant
Biopolymer
Chemical Sciences
Chitosan
Coagulation
Ecology, environment
Exact sciences and technology
Flocculation
General purification processes
Life Sciences
Natural polymers
Physicochemistry of polymers
Pollution
Polymers
Starch and polysaccharides
Wastewater treatment
Wastewaters
Water treatment and pollution
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Summary:Chitosan is a partially deacetylated polymer obtained from the alkaline deacetylation of chitin, a biopolymer extracted from shellfish sources. Chitosan exhibits a variety of physico-chemical and biological properties resulting in numerous applications in fields such as cosmetics, biomedical engineering, pharmaceuticals, ophthalmology, biotechnology, agriculture, textiles, oenology, food processing and nutrition. This amino-biopolymer has also received a great deal of attention in the last decades in water treatment processes for the removal of particulate and dissolved contaminants. In particular, the development of chitosan-based materials as useful coagulants and flocculants is an expanding field in the area of water and wastewater treatment. Their coagulation and flocculation properties can be used to remove particulate inorganic or organic suspensions, and also dissolved organic substances. This paper gives an overview of the main results obtained in the treatment of various suspensions and solutions. The effects of the characteristics of the chitosan used and the conditions in solution on the coagulation/flocculation performance are also discussed.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2008.12.027