EXTRACTION OF NICKEL AND COPPER IONS FROM WASTE TECHNOLOGICAL SOLUTIONS

New methods of chemical and electrochemical extraction of nickel and copper ions from the wasted solutions of chemical nickeling and copper etching have been proposed. These methods combine deep level of Ni and Cu elimination and easy recycling of the metals. The technology does not require expensive reactants, nor new sophisticated equipment. A new membrane electrolyser has been developed to ensure ecologically safe elimination of the metals. It prevents emission of highly toxic chlorine gas, which can form in traditional electrochemical extraction technologies during treatment of the chloride-containing solutions of nickel or copper salts. Our technology effectively prevents contamination of the natural waters with toxic Ni and Cu ions. Original membrane electrolyser and the technology have been protected by the Ukrainian patent.