모자반(Sargassum thunbergii)을 이용한 Pb 및 Cr 제거
Biosorption of Pb and Cr by Using Sargassum thunbergii
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Abstract
The biosorption of Pb and Cr by Sargassum thunbergii was investigated in a batch conditions. The Pb and Cr uptake capacity of Sargassum thunbergii was 232.5mg Pb/g biomass and 91.6mg Cr/g biomass, respectively. An adsorption equilibria was reached within about 0.5hr for both the Pb and the Cr. The adsorption parameters for both the Pb and the Cr were determined according to the Langmuir and Freundlich model. With increasing pH values, more negative sites are becoming available for the adsorption of Pb and Cr. The selectivity of mixture solution showed an uptake order of Pb>Cu>Cr>Cd. Pb and Cr adsorbed by S. thunbergii could be recovered from 0.1M HCl, 0.1M HNO3 and 0.1M EDTA by a desorption process, and the efficiency of Pb desorption was above 95.8%, whereas the efficiency of the Cr desorption was below 50.7%.
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