Abstract
Abstract Chitosan is a natural product derived from chitin, which is mostly found in exo-skeletons of shrimp, crab and lobster shells. This paper presents a short review of the literature regarding the use of chitosan and its modifications for removing selected pollutants from water and wastewater. In particular, the examples of removal of metal ions, dyes, anions and phenols were described. Furthermore, the possibility of the use of chitosan as a coagulant and flocculant in water and wastewater technologies are also shown. Based on the literature review described in this article it can be concluded that chitosan and especially its modifications is a very promising sorbent for removing a broad spectrum of pollutants from aqueous solutions. It also presents directions for further research in order to obtain a better knowledge of the practical applications of chitosan.
Highlights
Chitosan is a natural product derived from chitin, which is mostly found in exo-skeletons of shrimp and crab and lobster shells
The results have demonstrated that efficiency of adsorption may be attributed mainly to the chemical structure of each dye
Chitosan beads which were cross-linked with epichlorohydrin has demonstrated the greatest affinity to the dye Reactive Red 189, the maximum sorption capacity was in the range 1802–1840 g dye/kg of sorbent at pH = 3 and a teme THE USE OF CHITOSAN FOR REMOVING SELECTED POLLUTANTS FROM WATER AND WASTEWATER – SHORT REVIEW
Summary
Chitosan is a natural product derived from chitin, which is mostly found in exo-skeletons of shrimp and crab and lobster shells. It is one of the most accessible renewable product in the natural environment, received in biosynthesis process [1]. Chitosan mainly derives from the process of chemical or enzymatic deacetylation of chitin. The physical modifications include the preparation of chitosan in various forms such as powder, nanoparticles, gel beads, membranes, sponges, “honeycomb” type structure and various types of fiber for all applications [3]. Chitosan is mainly used as an effective bio-sorbent in environmental engineering. This paper presents a brief overview of applications of chitosan in the field of water and wastewater treatment
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