The problem of industrial wastewater treatment to remove chromium(VI) ions is fairly topical due to functioning of various electroplating plants. High toxicity of these wastewaters and stringent requirements to removal of chromium(Vl) ions make integrated wastewater treatment techniques highly demanded. Sorption methods for Cr(VI) removal from water are widely used in practice. However, the anionic form of existence of Cr(Vl) ions in solution precludes the use of well-known sorbents for heavy metals [1]. Chro-mate ions are often sorbed from aqueous solutions by natural biopolymers such as chitosan [2], having large exchange capacity for anions, and microbes [3].
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