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《Chemical Industry Times》 2004-11
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Study on the Adsorption Mechanism to Chromium(Ⅵ) of Protonize Chitin

Xu Qi Yan Jinlong Cai Zhaosheng Yang Chunsheng(College of chemical and biological engineering of yancheng institute of technology,Jiangsu Yancheng 224003)  
The mechanism of the adsorption to chromium(Ⅵ) by the application of protonize chitm as a sorbent material to solid phase extraction was studied.Kinetic studies showed that chromiurn(Ⅵ) could be adsorbed rapidly and significantly by protonize chitin.At initial chromium(Ⅵ) concent ration of 20 mg/L and pH 4.5,sorption was almost 90% at 1h,and the first-order rate constant for chromium(Ⅵ)removal was calculated to be 4.19 h -1 .The experimental data was constant with the Lamgmuir and Freundlich relationships.The force of the interaction could be chiefly attributed to the electrostatic attraction between —NH_2+—CO—CH_3 and Cr_2O_7 2- ions.
【CateGory Index】: O647.3
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