The decision of ecological problems during utilization of components of galvanic productions sewages

Abstract

The article deals with physical and chemical regularities of chemical and electrochemical ionization of copper and its alloys. The aim of research is studying of physical and chemical properties of copper and zinc-containing systems, intensification of copper and its alloys ionization and the development of efficient resource-saving ways of exhausted electroplating electrolytes regeneration. The parameters of chemical and electrochemical copper dissolution in chloride electrolytes are determined; the changing of limiting step nature during copper electrochemical dissolution is established; the modification of passive layer on the copper surface is shown; the efficiency of copper and zinc separation in sulphate systems using contact displacement of copper by zinc. The experimental data is used as the basis for low-waste resource-saving technological processes development: regeneration of exhausted etching CuCl 2 and FeCl 3 solutions; the electrochemical method of fungicide copper hydroxochloride synthesis; brass etching solution regeneration during contact displacement of copper by zinc and crystallization deposition of metal compounds. The results of research can serve as the basis for development of new compositions of copper and its alloys effective high rate chemical etching; intensification of metal etching processes and the development of spent technological electrolytes regeneration methods