Abstract
A new procedure is presented for the photocatalytic treatment of the highly stable gold-cyanide complexes remaining in spent plating bath solutions. The process allows the recovery of gold by photocatalytic reduction, increasing simultaneously the availability of cyanide for removal treatment. Gold recovery requires a non-oxidant atmosphere and the presence of hydroxyl radical scavengers. The use of mixed TiO2/SiO2 photocatalysts leads to an improvement in the gold recovery rate.
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Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License ( https://creativecommons.org/licenses/by-nc/2.0 ), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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van Grieken, R., Aguado, J., López-Muñoz, MJ. et al. Photocatalytic gold recovery from spent cyanide plating bath solutions. Gold Bull 38, 180–187 (2005). https://doi.org/10.1007/BF03215258
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DOI: https://doi.org/10.1007/BF03215258