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KMID : 1024520020110040361
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Journal of the Environmental Sciences
2002 Volume.11 No. 4 p.361 ~ p.366
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The removal of lead ion by crab shell from aqueous solution
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Kim Dong-Seog
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Abstract
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Several effects on Pb removal by crab shell from aqueous solution were investigated. As the increase of initial Pb concentration and decrease of initial crab shell concentration, the time required to reach an equilibrium state and the residual Pb concentration increased. In our experimental ranges, the optimum initial Pb concentration and crab shell concentration were below 103 mg/ and over 0.5 mg/, respectively. Also, in order to investigate the mechanism of Pb removal by crab shell in aqueous solution, the crab shell was compared with chitosan and chitin on aspects of Pb removal capacity and Pb removal rate. The Pb removal by crab shell was greater than that by chitin and chitosan. The role of chitin was not so great in Pb removal by crab shell. The Pb removal by chitosan was not exactly correlated to the molecular weight of chitosan. weight of chitosan.
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KEYWORD
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biosorption, crab shell, chitin, chitosan, lead
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