Перегляд за Автор "Melnyk, Lyudmyla"

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Peculiarities of removal of natural water microcomponents within the process of membrane desalination (the cases of arsenic, boron, and manganese)
(2018) Melnyk, Lyudmyla
The removal of microcomponents during electrodialysis down to the norms of drinking water has been established to require deeper desalination than that provided by traditional techniques (0.2-0.3 g/dm3). The concentration range, within which the growth of the coefficient of microcomponent retention by nanofiltration and reverse osmosis membranes is observed, is individual for each component and depends on the nature of the membrane. Встановлено, що видалення мікрокомпонентів в процесі електродіалізу до норм питного водопостачання вимагає більш глибокого знесолення води (0,2-0,3 г/дм3), аніж за традиційного опріснення. Інтервал концентрацій, в якому спостерігається зростання коефіцієнта затримки мікрокомпонента нанофільтраційними та зворотноосмотичними мембранами, для кожного компонента є індивідуальним і залежить від природи мембрани.
Removal of As(V) compounds from water using OPMN-P nanofiltration membrane
(2016) Melnyk, Lyudmyla
High efficiency of removal of As(V) compounds from water with nanofiltration technique was shown. OPMN-P nanofiltration membrane was involved to investigations, which were performed within a wide range of pH,concentration of background electrolyte, operating pressure and permeate recovery (25-90%). The rejection has been found to reach 93-98%. As shown, the membrane is promising for water purification from arsenic, the maximal contaminant level is 10 μg/dm3. As(III) has to be oxidized preliminarily down to As (V) using photocatalysis.