AI Article Synopsis
- A novel method for recovering metallic silver and generating power was tested using bioelectrochemical systems (BESs) with cathodic reduction.
- In experiments, both Ag(+) ions and Ag(I) thiosulfate complexes were successfully reduced on the cathode, with Ag(+) showing a faster reduction rate.
- X-ray diffraction analysis confirmed that the metallic silver deposits had over 91% purity, and using simulated photographic wastewater demonstrated up to 95% efficiency in removing Ag(I).
Article Abstract
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.
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| http://dx.doi.org/10.1016/j.biortech.2012.02.029 | DOI Listing |
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