МЕМБРАНИ, МОДИФІКОВАНІ НАНОКОМПОЗИТАМИ ГІДРАТОВАНОГО ДІОКСИДУ ЦИРКОНІЮ ТА ОКИСЛЕНОГО ГРАФЕНУ
Organo-inorganic membranes were obtained by impregnating ultrafiltration membranes with a composite modifier - zirconium (IV) hydroxide, containing oxidized graphene (0.5 wt.%). The modifier was precipitated in the active layer of the membrane, thus forming a "secondary active layer". The...
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2020
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oai:ojs2.1444248.nisspano.web.hosting-test.net:article-1462020-06-22T13:02:54Z MEMBRANES MODIFIED BY NANOCOMPOSITES OF HYDRATED ZIRCONIUM DIOXIDE AND OXIDIZED GRAPHENE МЕМБРАНЫ, МОДИФИЦИРОВАННЫЕ НАНОКОМПОЗИТАМИ ГИДРАТОВАНОГО ДИОКСИДА ЦИРКОНИЯ И ОКИСЛЕННОГО ГРАФЕНА МЕМБРАНИ, МОДИФІКОВАНІ НАНОКОМПОЗИТАМИ ГІДРАТОВАНОГО ДІОКСИДУ ЦИРКОНІЮ ТА ОКИСЛЕНОГО ГРАФЕНУ Rozhdestvenskaya, Liudmyla Kudelko, Kateryna Ogenko, Volodymyr Bildyukevich, Alexandr Plisko, Tatiana Borisenko, Yulia Chmilenko, V organo-inorganic composite membranes, graphene oxide, zirconium (IV) hydroxide, nanoparticles, fouling. Organo-inorganic membranes were obtained by impregnating ultrafiltration membranes with a composite modifier - zirconium (IV) hydroxide, containing oxidized graphene (0.5 wt.%). The modifier was precipitated in the active layer of the membrane, thus forming a "secondary active layer". The layer thickness calculated according to the Kozeny-Carman equation is 0.66-1.38 μm. A thinner layer is formed in the membrane with smaller pore size. The diffusion coefficients of Li+ and Na+ ions were found. The effect of the modifier on the retention ability relative to hardness ions (10-14%) and to protein compounds (95-98%) during filtration is determined. Mathematical modeling of the dependence of the permeate flux via time showed that the presence of ion exchanger particles in the polymer active layer prevents the accumulation of organic substances in the pores. Therefore, only the outer surface of the membrane is contaminated, and the precipitate can be easily removed mechanically. It was shown that insertion of a carbon component into pores of the membranes, in addition to the inorganic ion-exchangers, is advisable only in the case of a finely porous active layer. In particular, the performance of the initial polymer membrane (20 dm3/m3.h)) and the selectivity to the calibration substance with a molecular weight of 40 kDa (99%) serve as expediency criteria. In comparison with a membrane modified only with inorganic ion exchanger, selectivity is increased, the rate of filtration of protein solutions is higher, and resistance to contamination by organic substances is achieved. The results are discussed from the view of the hydrophobic-hydrophilic properties of oxidized graphene. V.I.Vernadsky Institute of General and Inorganic Chemistry 2020-04-07 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/146 10.33609/2708-129X.86.4.2020.91-107 Ukrainian Chemistry Journal; Vol. 86 No. 4 (2020): Ukrainian Chemistry Journal; 91-107 Украинский химический журнал; Том 86 № 4 (2020): Украинский химический журнал; 91-107 Український хімічний журнал; Том 86 № 4 (2020): Український хімічний журнал; 91-107 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/146/91 |
| institution |
Ukrainian Chemistry Journal |
| baseUrl_str |
|
| datestamp_date |
2020-06-22T13:02:54Z |
| collection |
OJS |
| language |
English |
| topic_facet |
organo-inorganic composite membranes graphene oxide zirconium (IV) hydroxide nanoparticles fouling. |
| format |
Article |
| author |
Rozhdestvenskaya, Liudmyla Kudelko, Kateryna Ogenko, Volodymyr Bildyukevich, Alexandr Plisko, Tatiana Borisenko, Yulia Chmilenko, V |
| spellingShingle |
Rozhdestvenskaya, Liudmyla Kudelko, Kateryna Ogenko, Volodymyr Bildyukevich, Alexandr Plisko, Tatiana Borisenko, Yulia Chmilenko, V МЕМБРАНИ, МОДИФІКОВАНІ НАНОКОМПОЗИТАМИ ГІДРАТОВАНОГО ДІОКСИДУ ЦИРКОНІЮ ТА ОКИСЛЕНОГО ГРАФЕНУ |
| author_facet |
Rozhdestvenskaya, Liudmyla Kudelko, Kateryna Ogenko, Volodymyr Bildyukevich, Alexandr Plisko, Tatiana Borisenko, Yulia Chmilenko, V |
| author_sort |
Rozhdestvenskaya, Liudmyla |
| title |
МЕМБРАНИ, МОДИФІКОВАНІ НАНОКОМПОЗИТАМИ ГІДРАТОВАНОГО ДІОКСИДУ ЦИРКОНІЮ ТА ОКИСЛЕНОГО ГРАФЕНУ |
| title_short |
МЕМБРАНИ, МОДИФІКОВАНІ НАНОКОМПОЗИТАМИ ГІДРАТОВАНОГО ДІОКСИДУ ЦИРКОНІЮ ТА ОКИСЛЕНОГО ГРАФЕНУ |
| title_full |
МЕМБРАНИ, МОДИФІКОВАНІ НАНОКОМПОЗИТАМИ ГІДРАТОВАНОГО ДІОКСИДУ ЦИРКОНІЮ ТА ОКИСЛЕНОГО ГРАФЕНУ |
| title_fullStr |
МЕМБРАНИ, МОДИФІКОВАНІ НАНОКОМПОЗИТАМИ ГІДРАТОВАНОГО ДІОКСИДУ ЦИРКОНІЮ ТА ОКИСЛЕНОГО ГРАФЕНУ |
| title_full_unstemmed |
МЕМБРАНИ, МОДИФІКОВАНІ НАНОКОМПОЗИТАМИ ГІДРАТОВАНОГО ДІОКСИДУ ЦИРКОНІЮ ТА ОКИСЛЕНОГО ГРАФЕНУ |
| title_sort |
мембрани, модифіковані нанокомпозитами гідратованого діоксиду цирконію та окисленого графену |
| title_alt |
MEMBRANES MODIFIED BY NANOCOMPOSITES OF HYDRATED ZIRCONIUM DIOXIDE AND OXIDIZED GRAPHENE МЕМБРАНЫ, МОДИФИЦИРОВАННЫЕ НАНОКОМПОЗИТАМИ ГИДРАТОВАНОГО ДИОКСИДА ЦИРКОНИЯ И ОКИСЛЕННОГО ГРАФЕНА |
| description |
Organo-inorganic membranes were obtained by impregnating ultrafiltration membranes with a composite modifier - zirconium (IV) hydroxide, containing oxidized graphene (0.5 wt.%). The modifier was precipitated in the active layer of the membrane, thus forming a "secondary active layer". The layer thickness calculated according to the Kozeny-Carman equation is 0.66-1.38 μm. A thinner layer is formed in the membrane with smaller pore size. The diffusion coefficients of Li+ and Na+ ions were found. The effect of the modifier on the retention ability relative to hardness ions (10-14%) and to protein compounds (95-98%) during filtration is determined. Mathematical modeling of the dependence of the permeate flux via time showed that the presence of ion exchanger particles in the polymer active layer prevents the accumulation of organic substances in the pores. Therefore, only the outer surface of the membrane is contaminated, and the precipitate can be easily removed mechanically. It was shown that insertion of a carbon component into pores of the membranes, in addition to the inorganic ion-exchangers, is advisable only in the case of a finely porous active layer. In particular, the performance of the initial polymer membrane (20 dm3/m3.h)) and the selectivity to the calibration substance with a molecular weight of 40 kDa (99%) serve as expediency criteria. In comparison with a membrane modified only with inorganic ion exchanger, selectivity is increased, the rate of filtration of protein solutions is higher, and resistance to contamination by organic substances is achieved. The results are discussed from the view of the hydrophobic-hydrophilic properties of oxidized graphene. |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2020 |
| url |
https://ucj.org.ua/index.php/journal/article/view/146 |
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2025-09-24T17:43:25Z |
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2025-09-24T17:43:25Z |
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