Abstract :- As a promising adsorbent, chitosan has been found to be extremely useful in its native form as well as in modified forms for the removal of variety of dyes from aqueous medium. Scientific workers have modified chitosan structurally by utilizing its -OH and -NH2functional moieties in numerous ways to obtain potential material with chemical and physical stabilities. Various modifications of chitosan involve crosslinking, grafting, impregnation and composite formation. Among various established routes of modifications, the most common way is its crosslinking to provide enhanced mechanical strength along with minimizing its solubility in acidic environment. In this paper, we review briefly only the crosslinked chitosan materials reported in last fifteen years by various researchers for adsorption of dyes as pollutants in order to provide clean and safe environment. Various materials formed through crosslinking, the dyes targeted for adsorption, various isotherms studies, kinetics studies and adsorption capacities of these materials have been discussed in details on case wise basis.
Author :- P. M. Nandanwar, S. H. Vithalkar, P. Bakshe, A. Shekhawat and R. M. Jugade
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