José L. Arredondo, Fernando F. Rivera
This paper concerns silver recovery from simulated rinse wastewater from the electrolytic cyanide silver process (1300 and 23,000 ppm of Ag(I) and CN/C0 , respectively, at pH 13 and 150 mS cm/C0 1 conductivity) using a laboratory scale RCE. Rotating disk electrode (RDE) studies revealed that at /C0 1.35 /C20 E /C20 /C0 1.15 V vs. SCE, the Ag(I)/Ag process is limited by mass transport. Global mass transport data were obtained by monitoring the (first order) concentration decay of Ag(I). The electrolyses were performed by maintaining a potential of /C0 1.2 V vs. SCE and varying the Reynolds numbers between 7600 /C20 Re /C20 45,400. Based on the Sh = aRebSc0.356 correlation, the value of the constant a, associated with transport properties, shape and cell dimensions, was 0.11; the constant b exhibited a value of 0.99 attributed to rough silver deposits on RCE interface. The best electrolysis in terms of Ag(I) removal reached 8 ppm in 90 minutes, at Re = 45400 with a 98% current efficiency, and energy consumption of 1.5 KW h m/C0 3. The metallic silver and treated solution can be recycled back through the same electrolytic cyanide silver process.
@article{668539a4-efa7-4c48-a927-87bda8e98919,
title={Silver recovery from an effluent generated by plating industry using a rotating cylinder electrode (RCE)},
author={José L. Arredondo and Fernando F. Rivera},
year={2014},
language={es}
}TY - JOUR TI - Silver recovery from an effluent generated by plating industry using a rotating cylinder electrode (RCE) AU - José L. Arredondo AU - Fernando F. Rivera PY - 2014 LA - es ER -
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