| Literature DB >> 18455299 |
Ting Fan1, Yunguo Liu, Baoying Feng, Guangming Zeng, Chunping Yang, Ming Zhou, Haizhou Zhou, Zhenfeng Tan, Xin Wang.
Abstract
The isotherms, kinetics and thermodynamics of Cd(II), Zn(II) and Pb(II) biosorption by Penicillium simplicissimum were investigated in a batch system. The effects of pH, initial metal ions concentration, biomass dose, contact time, temperature and co-ions on the biosorption were studied. Adsorption data were well described by both the Redlich-Peterson and Langmuir model. Chemical ion-exchange was found to be an important process based on free energy value from Dubini-Radushkevich isotherm for all metal ions. The results of the kinetic studies of all metal ions at different temperature showed that the rate of adsorption followed the pseudo second-order kinetics well. The thermodynamics constants DeltaG degrees , DeltaH degrees and DeltaS degrees of the adsorption process showed that biosorption of Cd(II), Zn(II) and Pb(II) ions on Penicillium simplicissimum were endothermic and spontaneous.Entities:
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Year: 2008 PMID： 18455299 DOI： 10.1016/j.jhazmat.2008.03.038
Source DB: PubMed Journal: J Hazard Mater ISSN： 0304-3894 Impact factor: 10.588