Recovery of silver from silver(I)-containing solutions in bioelectrochemical reactors

被引：93

作者：

Tao, Hu-Chun ^{[1
]}

Gao, Zhu-You ^{[1
]}

Ding, Hui ^{[1
]}

Xu, Nan ^{[1
]}

Wu, Wei-Min ^{[2
]}

机构：

[1] Peking Univ, Shenzhen Grad Sch, Sch Environm & Energy, Key Lab Urban Habitat Environm Sci & Technol, Shenzhen 518055, Peoples R China

[2] Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA

来源：

BIORESOURCE TECHNOLOGY | 2012年 / 111卷

关键词：

Bioelectrochemical system; Silver recovery; Photographic waste; ELECTRICITY PRODUCTION; REDUCTION; IRON; OXIDATION;

D O I：

10.1016/j.biortech.2012.02.029

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A novel approach was tested for metallic silver recovery and power generation by using cathodic reduction in bioelectrochemical systems (BESs). In dual-chamber BESs (130 mL volume) with acetate as electron donor on anode, both Ag+ ions and Ag(I) thiosulfate complex in catholyte were reduced on cathode. The reduction rate of Ag+ was more rapid than the Ag(I) complex as expected by energetic analysis. X-ray diffraction (XRD) analysis indicated that electrodeposits on cathodes from both catholyte were metallic silver with >91% purity. The feasibility of metallic silver recovery with the BESs was confirmed using simulated photographic wastewater and up to 95% of Ag(I) removal was achieved. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：92 / 97

页数：6

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