Evaluation of the contribution of ion exchange in the process of demanganization with modified cation exchange resin KU-2-8.

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dc.contributor.authorTrus, Inna M.
dc.contributor.authorGomelya, Mukola D.
dc.contributor.authorTverdokhlib, Mariia M.
dc.date.accessioned2022-07-20T13:48:44Z
dc.date.available2022-07-20T13:48:44Z
dc.date.issued2021
dc.description.abstractenAn effective method of water purification from manganese compounds is the use of magnetite, so it is advisable to improve the way it is used. The main disadvantage of using dispersed microcrystalline magnetite is the difficulty of implementing water purification in dynamic conditions, due to the significant resistance to water filtration. In the case of the use of magnetite in static conditions, there is a constant consumption of magnetite after settling and filtration, and the demanganization process requires the use of bulky and poorly mobile installations (mixers, settling tanks and filters). Therefore, water purification from manganese ions was carried out under dynamic conditions by filtering water through a layer of strong acid cation exchange resin KU-2-8 in H+, Na+, Ca2+ forms modified with magnetite. This allows constant contact of the solution with the ion exchange material and reduces the role of the limiting diffusion factor on the water purification process. When evaluating the effectiveness of cation exchange resin KU-2-8 in the extraction of Mn2+ ions from water depending on the form of the resin, it was found that the FEDC for the resin in H+ form is 2198 mg-eq/dm3, for Na+ it is 2175 mg-eq/dm3 and for Ca2+ the value is 1717 mg-eq/dm3. Therefore, during the transition from H+ to Na+ and to Ca2+ form there is a decrease in the sorption capacity for Mn2+ ions in the cation exchange resin KU-2-8. On the cation exchange resin in Ca2+ form the efficiency of demanganization decreases with increasing concentration of manganese ions. When increasing the initial concentration from 5 to 10 and 30 mg/dm3 in distilled water, the residual concentration increases from 0.14 to 0.35 and up to 1.95 mg/dm3 when filtered through 10 cm3 of resin in Ca2+ form. When removing Mn2+ ions from artesian water, the residual concentration was 4.0; 7.0 and 27.0 mg/dm3 respectively. Thus, on magnetite-modified cation exchange resin, manganese ions are removed only partially due to ion exchange and their complete removal from water is possible only due to catalytic oxidation and deposition on magnetite.uk
dc.format.pagerangeP. 540-548uk
dc.identifier.citationTrus, І. Evaluation of the contribution of ion exchange in the process of demanganization with modified cation exchange resin KU-2-8 / Inna M. Trus, Mukola D. Gomelya, Mariia M. Tverdokhlib // Journal of Chemistry and Technologies. – 2022. – 29 (4). – P. 540-548.uk
dc.identifier.doihttps://doi.org/10.15421/jchemtech.v29i4.242561
dc.identifier.urihttps://ela.kpi.ua/handle/123456789/49145
dc.language.isoenuk
dc.publisherДніпровського національного університету імені Олеся Гончараuk
dc.sourceJournal of Chemistry and Technologies, 29(4)uk
dc.subjectdemanganizationuk
dc.subjection exchangeuk
dc.subjectcatalytic oxidationuk
dc.subjectartesian wateruk
dc.subjectmagnetiteuk
dc.titleEvaluation of the contribution of ion exchange in the process of demanganization with modified cation exchange resin KU-2-8.uk
dc.typeArticleuk

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