MANAGEMENT OF ARGENTOMETRIC WASTE FROM CHLORIDE ANALYSIS
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Abstract
Different service or teaching laboratories produce silver waste from chlorides with argentometric methodologies. Here we obtained experimental conditions for silver recovery using electrochemical techniques. Firstly, a thermodynamic study was made to know the behavior of the several species of silver in aqueous solution. Then, several trials were conducted with a potentiostat into a three-electrode cell with potentiodynamic sweeps, processing synthetic waste make with Mohr methods, to obtain experimental conditions to reduce Ag+. A continuation, synthetic and real waste were treated individually into a two-electrodes cell, found a silver recovery of 99,6% y 93,3% respectively. These results confirm the feasibility of recovering metallic silver from waste, generated from argentometric methods, also this data provides an initial point to develop process for silver treatment a large scale.
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