Intracellular recovery of gold by microbial reduction of AuCl4- ions using the anaerobic bacterium Shewanella algae
Intracellular recovery of gold by microbial reduction of AuCl4- ions using the anaerobic bacterium Shewanella algae
复制标题
DOI：
10.1016/j.hydromet.2005.09.006
复制
发表时间：
2006-01-01
期刊：
影响因子：
4.7
通讯作者：
Nagamine, S
中科院分区：
文献类型：
--
作者：
Konishi, Y;Tsukiyama, T;Nagamine, S
在25 ℃和pH 7条件下，以H-2为电子供体，利用嗜温厌氧希瓦氏藻（Shewanella algae）实现了金的微生物还原和细胞内沉淀。研究了S.藻类是一个快速的过程：0.1-1 mol/m（3）AuCl 4（-）离子在30 min内被完全还原为不溶性金。生物沉淀物是存在于周质间隙中的10-20 nm的结晶金纳米颗粒。S.藻类在3.2 × 10（15）个细胞/m3和25 ℃下的生长与柠檬酸水溶液（化学还原剂）在20 mol/m3和50 ℃下的生长相当。金的细胞内回收作为传统方法的环境友好的替代方案是潜在的有吸引力的。(c)2005 Elsevier B. V.保留所有权利。
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.