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. 2001 Aug;22(8):979-90.
doi: 10.1080/09593332208618234.

Treatment of alloy-electroplating wastewater by an automated solvent extraction technique

Y K Sze  1 , L Z Xue, M Y Lee
Affiliations

Treatment of alloy-electroplating wastewater by an automated solvent extraction technique

Y K Sze et al. Environ Technol. 2001 Aug.

Abstract

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-88A) 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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