期刊
BIORESOURCE TECHNOLOGY
卷 111, 期 -, 页码 92-97出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.02.029
关键词
Bioelectrochemical system; Silver recovery; Photographic waste
资金
- Shenzhen Bureau of Science Technology & Information, Shenzhen, China
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.
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