Sergeyeva O. Plasmochemical extraction technology of ions of polyvalent metals from waste products of galvanic and etching manufactures from liquid phase

The thesis is devoted to both theoretical questions and to experimental researches of extraction of polyvalent metals ions from sewage of galvanic and etching manufactures by processing them with low-temperature plasma contact (LPC). Researches of physical and chemical transformations both in water and water solutions containing ions of polyvalent metals are represented in the paper mentioned. It is shown that in the process of plasmochemical influencing liquid the accumulating peroxide compounds takes place and metals ions are extracted as practically insoluble compounds. It has been developed the mathematical model of the kinetics of concentration changes in liquid during its being treated by LPC. This very model may be used for accounting plasmochemical processes, radiolysis, electrolysis and photolysis. The technological scheme of plasmochemical extraction of polyvalent metals ions is compacting, universal and may be easily changed according to requirements of technological process. The usage of the technology of extraction of polyvalent metals ions from sewage allows extracting more than 99% of metal.