The Fabrication of Bio-ceramsite for the Removal of Heavy Metals and Its Toxicity to Bacteria

文献类型: 外文期刊

第一作者: Shi Yan

作者: Shi Yan;Qi Xuebin;Gao Qing;Shi Yan;Sun Ken;Sun Ken

作者机构:

关键词: immobilization;biosorption;bio-ceramsite;dissociation;cell membrane

期刊名称:JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION ( 影响因子:0.957; 五年影响因子:0.959 )

ISSN: 1000-2413

年卷期: 2015 年 30 卷 3 期

页码:

收录情况: SCI

摘要: Bio-ceramsite technology is one of the most effective technologies in the pretreatment of drinking water. In this work, bio-ceramsite was fabricated by Citrobacter freundii (C. freundii) immobilization on the ceramsite. The findings of the current study suggest that the bio-ceramites showed biosorption abilities for Cd(II) and Pb(II) and the removal efficiency for Pb(II) is lower than Cd(II). The adsorption mechanism can be attributed to electrostatic attraction and covalent bond. The morphology of the cells changed after the adsorption of Cd(II) and Pb(II) due to the dissociation of the assembly of peptidoglycan and lipopolysaccharide. The fluorescence polarization has shown a significant decrease in membrane fluidity and an increase of permeability of cell membrane. The spectral profile of C. freundii suggests the alteration of carbonyl, amide and phosphonic groups on the cell membrane.

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