Intracellular recovery of gold by microbial reduction of AuCl4- ions using the anaerobic bacterium Shewanella algae

被引：118

作者：

Konishi, Y ^{[1
]}

Tsukiyama, T ^{[1
]}

Ohno, K ^{[1
]}

Saitoh, N ^{[1
]}

Nomura, T ^{[1
]}

Nagamine, S ^{[1
]}

机构：

[1] Osaka Prefecture Univ, Dept Chem Engn, Sakai, Osaka 5998531, Japan

来源：

HYDROMETALLURGY | 2006年 / 81卷 / 01期

关键词：

gold; noble metal; recovery; nanoparticles; Shewanella algae;

D O I：

10.1016/j.hydromet.2005.09.006

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Microbial reduction and intracellular precipitation of gold was achieved at 25 degrees C and pH 7 by using the mesophilic anaerobic bacterium Shewanella algae with H-2 as the electron donor. The reductive precipitation of gold by S. algae was a fast process: 0.1-1 mol/m(3) AuCl4(-) ions were completely reduced to insoluble gold within 30 min. The biogenic precipitates were crystalline gold nanoparticles of 10-20 nm present in the periplasmic space. The reducing power of S. algae at 3.2 x 10(15) cells/m(3) and 25 degrees C was comparable to that of aqueous citric acid solution (chemical reductant) at 20 mol/m(3) and 50 degrees C. The intracellular recovery of gold is potentially attractive as an environmentally friendly alternative to conventional methods. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：24 / 29

页数：6

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