The practical application of supported liquid membranes to the problem of recycling of plating electrolytes has been demonstrated. Cu++ and Pb++ can be efficiently extracted with this technique. The application of electroassisted extraction to anions appears to be an appropriate technique for anion extraction, although more work is necessary to quantify it.
The recycling of plating baths using new concepts in electroassisted liquid-liquid transfer will be investigated. The problems of specific extraction of both anions and cations from spent electrolyte from plating baths will be addressed. A new approach to control the extractant binding constant based on redox swithching of the ligand will be developed. Anion extraction using ion pairing properties of the ligand will be used for the separation of anions of commercial interest present in spent electrolyte. Three separation strategies will be explored, direct liquid-liquid extraction, SLM and electroassisted separations. In the latter case, an electrodialysis module designed specifically to work with supported liquid membranes will be developed and a demonstration module will be tested in an industrial environment.
Funding SchemeCSC - Cost-sharing contracts
CH1 6ES Chester