Biosorption and Bioreduction of Trivalent Aurum by Photosynthetic Bacteria Rhodobacter capsulatus

被引：0
作者：
Youzhi Feng
Yongchang Yu
Yiming Wang
Xiangui Lin
机构：
[1] Institute of Soil Science,Laboratory of Biochemistry
[2] Chinese Academy of Sciences,undefined
[3] Graduate School of the Chinese Academy of Sciences,undefined
来源：
Current Microbiology | 2007年 / 55卷
关键词：
Biosorption; Bioreduction; Gold; Aurum; Photosynthetic bacteria;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Biosorption has been shown to be an eco-friendly approach to remove heavy metal ions. In this study, the photosynthetic bacteria Rhodobacter capsulatus was screened and found to have strong ability to adsorb Au(III). The maximum specific uptake of living cells was over 92.43 mg HAuCl4/g dry weight of cell in the logarithmic phase. Biosorpion ability would be enhanced by an acidic environment. As the main cations, during biosorption the quantity of Mg2+ exchanged was more than Na+. Biosorbed Au(III) could be reduced by carotenoid and enzymes embedded and/or excreted by R. capsulatus, which might be the mechanism of photosynthtic bacteria metal tolerance.
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页码：402 / 408
页数：6
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