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The Fabrication of Bio-ceramsite for the Removal of Heavy Metals and Its Toxicity to Bacteria 被引量：1

The Fabrication of Bio-ceramsite for the Removal of Heavy Metals and Its Toxicity to Bacteria
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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 Citrobacterfreundii （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. Bio-ceramsite technology is one of the most effective technologies in the pretreatment of drinking water. In this work, bio-ceramsite was fabricated by Citrobacterfreundii （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.
作者 石岩 SUN Ken 齐学斌 GAO Qing
机构地区 Farmland Irrigation Research Institute School of Environmental and Municipal Engineering School of Water Resource & Environment
出处 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第3期649-654,共6页 武汉理工大学学报（材料科学英文版）
基金 Funded by the National High Technology Research and Development Program of China(863 Program)(No.2012AA100604)
关键词 IMMOBILIZATION BIOSORPTION bio-ceramsite DISSOCIATION cell membrane immobilization biosorption bio-ceramsite dissociation cell membrane
分类号 X703.1 [环境科学与工程—环境工程]
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参考文献22

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Journal of Wuhan University of Technology(Materials Science)
2015年 第3期

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