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A closed-loop electrogenerative recycling process for recovery of silver from a diluted cyanide solution†
Bee Ping Teh,Nadia Mansor,Hairul Hisham Hamzah,Norita Mohamed
RSC Advances Pub Date : 10/07/2019 00:00:00 , DOI:10.1039/C9RA05557F
Abstract

A closed-loop process for the complete recovery of silver from a diluted silver cyanide solution has been constructed based on an electrogenerative process. It was shown that the reduction of silver was a mass transport controlled process. Under optimal experimental conditions, 100% of silver was recovered from 500 mg L−1 and 100 mg L−1 silver cyanide solutions by using a reticulated vitreous electrode (RVC) as the cathode. The cyanide solution was recycled and reused so that a closed-loop process was obtained. In addition, the RVC in this study can be used repeatedly up to 10 cycles with a calculated relative standard deviation of 1.90%.

Graphical abstract: A closed-loop electrogenerative recycling process for recovery of silver from a diluted cyanide solution
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