Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
584713 | Journal of Hazardous Materials | 2007 | 6 Pages |
Abstract
Biosorption is an effective method to remove heavy metals from wastewater. In this work, adsorption features of Cladophora fascicularis were investigated as a function of time, initial pH, initial Pb(II) concentrations, temperature and co-existing ions. Kinetics and equilibria were obtained from batch experiments. The biosorption kinetics followed the pseudo-second order model. Adsorption equilibria were well described by the Langmuir and Freundlich isotherm models. The maximum adsorption capacity was 198.5Â mg/g at 298Â K and pH 5.0. The adsorption processes were endothermic and the biosorption heat was 29.6Â kJ/mol. Desorption experiments indicated that 0.01Â mol/L Na2EDTA was an efficient desorbent for the recovery of Pb(II) from biomass. IR spectrum analysis suggested amido or hydroxy, CO and C-O could combine intensively with Pb(II).
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Authors
Liping Deng, Yingying Su, Hua Su, Xinting Wang, Xiaobin Zhu,