Journal
ENVIRONMENTAL TECHNOLOGY
Volume 22, Issue 8, Pages 979-990Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593332208618234
Keywords
waste treatment; zinc; cobalt; alloy electroplating; solvent extraction
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Electroplating with highly toxic metals is being gradually replaced by alloy or mixed-metal electroplating. We developed a solvent extraction method for the treatment of waste rinsewater generated in Zn-Co alloy electroplating, based on the studies of the extraction properties. An alkyl ester of an alkylphosphonic acid (PC-SSA) or a dialky phosphinic acid (Cyanex 272) was used as the extractant. The two metals were co-extracted into the organic solvent and then separately recovered in a simple process. The feasibility of the process was demonstrated with automated mixer-settler solvent extraction units.
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