Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5409742 | Journal of Molecular Liquids | 2016 | 6 Pages |
Abstract
The batch macroscopic experiments showed that the biosorption kinetics of Sr(II) on Bacillus subtilis can be fitted by pseudo-second-order kinetic model very well, and adsorption isotherms can be satisfactorily fitted by Langmuir model with high correlation coefficient (R2Â >Â 0.995). The independent of ionic strength of Sr(II) biosorption on B. subtilis at pHÂ 2.0-11.0 indicated the inner-sphere surface complexation. The maximum adsorption capacity of Sr(II) on B. subtilis calculated from Langmuir model at pHÂ 5.0 and 293Â K was 49.75Â mg/g. The fitted results of the surface complexation modeling revealed that the biosorption of Sr(II) on B. subtilis can be simulated by diffuse layer modeling with two inner-sphere surface complexes such as SOSr+ and SOSr(OH)2â species. Theses observation indicated that B. subtilis can be regarded as a promising bio-adsorbent candidate for the preconcentration and immobilization of radionuclides from aqueous solutions in the environmental remediation.
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Authors
Yingwei Guo, Weigang Du, Song Wang, Liqiang Tan,