Application of subacid cationites for water conditioning in baromembrane demineralization
DOI:
https://doi.org/10.15587/1729-4061.2013.14810Keywords:
ion exchange, cationite, demineralizatio, , nanofiltration, permiat, concentrate, regenerationAbstract
The article presents the results of studies on the stabilization treatment of water before the baromembrane demineralization. It was shown that subacid cationites in the acid form provide a complete reduction of alkalinity of water with its partial softening, and strongly acid cationites in the sodium form provide deep water softening without reducing its alkalinity. Ionites in a salt form provide effective neutralization of acidified aqueous solutions, including permiates and filtrates transferring the subacid cationites to the acid form. It was found that subacid cationites in calcium (magnesium) form are almost not regenerated by sodium chloride solutions in neutral and subacid medium. It was shown that the strongly acid cationite effectively adsorbs hardness ions with sodium ions concentration up to 143 mg-ekv/dm3, but at the same time it is effectively regenerated by 5-10% sodium chloride solutionsReferences
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Copyright (c) 2014 Ірина Миколаївна Макаренко, Олена Володимирівна Глушко, Володимир Володимирович Рисухін, Оксана Миколаївна Терещенко
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