Treatment of Electroplating Wastes by Ion Exchange.
Technical rept. 20 Oct 71-1 Oct 72,
NEW MEXICO UNIV ALBUQUERQUE ERIC H WANG CIVIL ENGINEERING RESEARCH FACILITY
Pagination or Media Count:
The chemistry, efficiency, and regeneration characteristics of strong anion resins Dowex MSA-1, Amberlite IRA-938, Duolite A-102D and mixed bed systems Dowex MSA-1 and MSC-1, Amberlite IRA-938 and IR-120 plus, Duolite A-102D and C-20 were tested in an attempt to find a satisfactory ion exchange system for the removal of cyanide and heavy metals Ni, Cu, Cd, Zn from dilute electroplating wastes. Determination of the species which cause fouling on these resins was also attempted. Results show that the strong anion resins remove both the cyanide and the metal as an anionic complex species. While the removal produces acceptable effluent for disposal into public sewage systems, the capacity of the resin decreases with successive regenerations. In some resin systems this decrease in capacity was as high as 56 percent. In addition, the regeneration liquids contain anionic complex metal cyanides which are unsuitable for recycling and require further treatment. Author
- Water Pollution and Control