Biosorption and bioreduction of trivalent aurum by photosynthetic bacteria Rhodobacter capsulatus

被引：61

作者：

Feng, Youzhi

Yu, Yongchang

Wang, Yiming

Lin, Xiangui ^{[1
]}

机构：

[1] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

[2] Chinese Acad Sci, Inst Soil Sci, Biochem Lab, Nanjing 210008, Peoples R China

来源：

CURRENT MICROBIOLOGY | 2007年 / 55卷 / 05期

关键词：

biosorption; bioreduction; gold; aurum; photosynthetic bacteria; Rhodobacter capsulatus;

D O I：

10.1007/s00284-007-9007-6

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

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.

引用

页码：402 / 408

页数：7

共 18 条

[1] Transmetallation of nickel(II) ion in a nickel(II) azamacrocyclic complex with gold(III) ion [J].