Introduction. The coal mining companies are pumping and discharging into environment the untreated mine-pit and quarry waters that results in a negative impact on natural water reservoirs, and respectively involves a continued reduction in water resources' stocks and quality. The only one mine's untreated water discharge annually produces the environment contamination with more than 26 tons of iron, 1,300 tons of sulphate, 876 tons of chlorides, 175 tons of suspended substances. This problem is particularly acute for the eastern and southern Ukraine regions, where local resources are insufficient to cover the need for quality water. Therefore, the situation implies involving the green technology solutions for mine water treatment problem. Until recently, the most common water treatment technology was ion-exchange one, but it has an important drawback, namely the use of a large reactants' number for regeneration, followed by discharge of mineralized drain water into surface waters. Consequently, this technology application is rational only under condition of effective regeneration techniques development and reduced volume of regeneration solutions used, the third contributive factor being those solutions' subsequent processing. The currently prevailing water treatment technology is reverse osmosis technique, as its application practically excludes the use of reactants, essentially reducing the amount of salt discharged into surface waters; the reverse osmosis is very effective due to high selectivity membranes. But to prevent water resources pollution necessary is to develop solutions for mineral concentrates treatment. Therefore the problem of mine water demineralization and high mineralization index concentrates' treatment is an urgent one. Literature review. The treatment of baromembrane water demineralization concentrates containing only sulphates, hydrocarbons and hardness ions can be reduced to reactant-aided precipitation of sulfate ions and hardness ions in the form of calcium carbonate, magnesium hydroxide and calcium hydroxyl-alumosulphate. However, in the presence of chlorides such demineralization may not be possible because the chlorides in such case shall not be separated of the water. Electrolyzing the solutions containing chlorides and sulphates we can obtain the sulfuric acid and active chlorine [1]. But at that the sulfuric acid contains chlorides (HCl) and active chlorine admixtures. Besides, the active chlorine catching and treatment is a complex process. The concentrates resulting from sulphates' separation at natural and waste water demineralization, can contain apart of hardness ions the sodium cations, chlorides and bicarbonates. The solution containing only chloride anions, carbonates and bicarbonates gives such electrodialysis products as alkali and hydrochloric acid or sodium hypochlorite [2, 3]. In such a way, the separation of chloride and sulfate represents a complex issue and needs to be addressed through new efficient technologies development. Aim of the Research. Investigation of i...
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