Перегляд за Автор "Ponomarova, Ludmyla"

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Hybrid organic-inorganic nanocomposites for ion-exchange processes
(2018) Dzyazko, Yulia; Ponomarova, Ludmyla
Two types of composite ion-exchangers, which are based on strongly acidic gel-like cation-exchange resin and weakly acidic cation exchange resin have been obtained by modification with nanoparticles of zirconium hydrophosphate. Removal of the dye from deionized water and Ni(II) ions from water containing also hardness ions was studied under dynamic conditions. The composites show higher break-through capacity than that of the pristine resin.
Ion exchange membranes for regeneration of hydrochloric acid from etching solutions
(2018) Bolshanina, Svitlana; Serdiuk, Vasyl; Ponomarova, Ludmyla; Yanovska, Anna; Ableev, Alexey
The process of regeneration of utilized hydrochloric acid etching solutions using electrochemical equipment with ion exchange membranes was examined. The products of cathode reactions were studied. It was proved that the waste solution was not only purified from contaminate ions, but the acid content increased during the electrolyzer operation.Розглядається процес регенерації відпрацьованих травильних розчинів на основі хлоридної кислоти з використанням електрохімічних пристроїв з іонообмінними мембранами. Вивчено продукти реакцій на катоді. Доведено, що при роботі електролізера відпрацьований травильний розчин не тільки очищується від забруднюючих його іонів, але і збільшується вміст кислоти.
Laboratory and industrial testing of membrane electrochemical devices for purification and regeneration of chromium-containing galvanic solutions
(2018) Serdiuk, Vasyl; Zaytseva, Kseniya; Sklabinsky, Vsevolod; Ivchenko, Viktoriya; Ponomarova, Ludmyla
The regeneration process of galvanic solutions by transferring the contaminating Сd2 + and Zn2 + cations through a cation exchange membrane RALEX®CM-PES 11-66 in a two-chamber electrolyser has been researched. The cathode processes that are associated with the migration of ions through the membrane and the cathodic deposition have been investigated. Laboratory and industrial testing of devices was carried out. Cathode products were studied using scanning electron microscopy with X-ray phase microanalysis functions to determine the elemental composition of cathodic deposits. This process allows to regenerate galvanic solutions and maintain stable composition of passivation baths.
Sorption properties of hydroxyapatite-based composites in alginate shell
(2018) Yanovska, Ganna; Bolshanina, Svitlana; Ivchenko, Viktoriya; Sydorenko, Yaroslav; Ponomarova, Ludmyla
Hydroxyapatite-based composite materials are widely used for treatment of bone defects due to their biocompatibility and osteoconductivity. In this work they were successfully combined with alginate – biopolymer with gel forming ability. Sorption properties of the composite materials towards Cu2+ and Zn2+ions were compared. It was shown that sorption of Zn2+ ions is more effective due to ion exchange properties and formation of new insoluble phase after contact with microsphere surface.