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2012, Volume 6, Issue 1

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Frontiers of Environmental Science & Engineering >> 2012, Volume 6, Issue 1 doi: 10.1007/s11783-011-0206-9

Biosorption of Cd

1. College of Environmental Science, Anhui Normal University, Wuhu 241000, China; 2. Chinese Research Academy of Environmental Sciences, Beijing 100012, China; 3. College of Resource and Environment, Southwest University, Chongqing 400716, China

Available online: 2012-02-01
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Abstract

The biosorption of Cd and Cu onto the immobilized ( ) was investigated in this study. Adsorption kinetics, isotherms and the effect of pH were studied. The results indicated that the biosorption of Cd and Cu on the immobilized was fast at initial stage and then became slow. The maximum biosorption of heavy metal ions on immobilized were observed at pH 4 for Cd and Cu . by the pseudo-second-order model described the sorption kinetic data well according to the high correlation coefficient ( ) obtained. The biosorption isotherm was fitted well by the Langmuir model, indicating possible mono-layer biosorption of Cd and Cu on the immobilized . Moreover, the immobilized after the sorption of Cd and Cu could be regenerated and reused.

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