МОДИФІКУВАННЯ ТРУБЧАСТИХ КЕРАМІЧНИХ МЕМБРАН ПІРОВУГЛЕЦЕМ ТА ДІОКСИДОМ КРЕМНІЮ
The tubular ceramic membranes of clay minerals were modified with silica and pyrocarbon, which was obtained by carbonizing of polymer precursors at 750 ° С in an argon flow. The precursors to carbonation were polymers formed from the polyisocyanate and sodium carboxymethylcellulose (membrane II) and...
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2019
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oai:ojs2.1444248.nisspano.web.hosting-test.net:article-1002019-12-19T18:20:23Z MODIFICATION OF TUBULAR CERAMIC MEMBRANES WITH PYROCARBON AND SILICA МОДИФИЦИРОВАНИЕ ТРУБЧАТЫХ КЕРАМИЧЕСКИХ МЕМБРАН ПИРОУГЛЕРОДОМ И ДИОКСИДОМ КРЕМНИЯ МОДИФІКУВАННЯ ТРУБЧАСТИХ КЕРАМІЧНИХ МЕМБРАН ПІРОВУГЛЕЦЕМ ТА ДІОКСИДОМ КРЕМНІЮ Goncharuk, Vladislav Ogenko, Volodymyr Dubrovina , Liubov Vyshnevskyi, Oleksii Dubrovin, Igor ceramic membranes, liquid silica glass, polyisocyanate, sodium carboxymethyl cellulose, sucrose, pyrocarbon, silica, water purification The tubular ceramic membranes of clay minerals were modified with silica and pyrocarbon, which was obtained by carbonizing of polymer precursors at 750 ° С in an argon flow. The precursors to carbonation were polymers formed from the polyisocyanate and sodium carboxymethylcellulose (membrane II) and polyisocyanate and sucrose (membrane III). Silicon dioxide was formed at high temperature from liquid glass. As a result of the modification, the membranes became black with a metallic luster. The composition and structure of the membranes were studied by XRF and SEM. The modifier of the membranes is located in the pore space in the form of separate particles and sintered agglomerates. The particle size of the modified membrane filler varies from 30 nm to ~ 1 μm depending on the modifier composition. The apparent density and open porosity for the unmodified membrane are 1.80 g/cm3 and 21.9 %, for membrane II - 1.83 g/cm3 and 19.7 %, for membrane III - 1.82 g/cm3 and 18.9 %. Testing of modified membranes was carried out by water purification from Ca2+ and Fe3+ using the baromembrane method at a working pressure of 0.6 MPa. The concentration of Ca2+ in aqueous solutions of CaCl2 was 100 mg/dm3, the concentration of Fe3+ in aqueous solutions of FeCl3 was 100 and 36 mg/dm3. The period of time until the establishment of dynamic equilibrium in systems during water purification is 4 hours. The unmodified membranes does not inhibit Ca2+ and Fe3+ at all. After reaching equilibrium the retention factor (R) of Ca2+ during water purification with modified membranes pressure vary from 20 to 28 % and the specific productivity – from 22 to 40 dm3/(m2×h). The retention coefficient of Fe3+, depending on the membranes modifier and concentration of the FeCl3 solutions being purified, is 78 - 99.9 %. The specific productivity in this case is 15 - 52.3 dm3/(m2×h). V.I.Vernadsky Institute of General and Inorganic Chemistry 2019-12-16 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/100 10.33609/0041-6045.85.11.2019.52-62 Ukrainian Chemistry Journal; Vol 85 No 11 (2019): Ukrainian Chemistry Journal; 52-62 Украинский химический журнал; Том 85 № 11 (2019): Украинский химический журнал; 52-62 Український хімічний журнал; Том 85 № 11 (2019): Український хімічний журнал; 52-62 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/100/65 |
| institution |
Ukrainian Chemistry Journal |
| baseUrl_str |
|
| datestamp_date |
2019-12-19T18:20:23Z |
| collection |
OJS |
| language |
English |
| topic_facet |
ceramic membranes liquid silica glass polyisocyanate sodium carboxymethyl cellulose sucrose pyrocarbon silica water purification |
| format |
Article |
| author |
Goncharuk, Vladislav Ogenko, Volodymyr Dubrovina , Liubov Vyshnevskyi, Oleksii Dubrovin, Igor |
| spellingShingle |
Goncharuk, Vladislav Ogenko, Volodymyr Dubrovina , Liubov Vyshnevskyi, Oleksii Dubrovin, Igor МОДИФІКУВАННЯ ТРУБЧАСТИХ КЕРАМІЧНИХ МЕМБРАН ПІРОВУГЛЕЦЕМ ТА ДІОКСИДОМ КРЕМНІЮ |
| author_facet |
Goncharuk, Vladislav Ogenko, Volodymyr Dubrovina , Liubov Vyshnevskyi, Oleksii Dubrovin, Igor |
| author_sort |
Goncharuk, Vladislav |
| title |
МОДИФІКУВАННЯ ТРУБЧАСТИХ КЕРАМІЧНИХ МЕМБРАН ПІРОВУГЛЕЦЕМ ТА ДІОКСИДОМ КРЕМНІЮ |
| title_short |
МОДИФІКУВАННЯ ТРУБЧАСТИХ КЕРАМІЧНИХ МЕМБРАН ПІРОВУГЛЕЦЕМ ТА ДІОКСИДОМ КРЕМНІЮ |
| title_full |
МОДИФІКУВАННЯ ТРУБЧАСТИХ КЕРАМІЧНИХ МЕМБРАН ПІРОВУГЛЕЦЕМ ТА ДІОКСИДОМ КРЕМНІЮ |
| title_fullStr |
МОДИФІКУВАННЯ ТРУБЧАСТИХ КЕРАМІЧНИХ МЕМБРАН ПІРОВУГЛЕЦЕМ ТА ДІОКСИДОМ КРЕМНІЮ |
| title_full_unstemmed |
МОДИФІКУВАННЯ ТРУБЧАСТИХ КЕРАМІЧНИХ МЕМБРАН ПІРОВУГЛЕЦЕМ ТА ДІОКСИДОМ КРЕМНІЮ |
| title_sort |
модифікування трубчастих керамічних мембран піровуглецем та діоксидом кремнію |
| title_alt |
MODIFICATION OF TUBULAR CERAMIC MEMBRANES WITH PYROCARBON AND SILICA МОДИФИЦИРОВАНИЕ ТРУБЧАТЫХ КЕРАМИЧЕСКИХ МЕМБРАН ПИРОУГЛЕРОДОМ И ДИОКСИДОМ КРЕМНИЯ |
| description |
The tubular ceramic membranes of clay minerals were modified with silica and pyrocarbon, which was obtained by carbonizing of polymer precursors at 750 ° С in an argon flow. The precursors to carbonation were polymers formed from the polyisocyanate and sodium carboxymethylcellulose (membrane II) and polyisocyanate and sucrose (membrane III). Silicon dioxide was formed at high temperature from liquid glass. As a result of the modification, the membranes became black with a metallic luster. The composition and structure of the membranes were studied by XRF and SEM. The modifier of the membranes is located in the pore space in the form of separate particles and sintered agglomerates. The particle size of the modified membrane filler varies from 30 nm to ~ 1 μm depending on the modifier composition. The apparent density and open porosity for the unmodified membrane are 1.80 g/cm3 and 21.9 %, for membrane II - 1.83 g/cm3 and 19.7 %, for membrane III - 1.82 g/cm3 and 18.9 %. Testing of modified membranes was carried out by water purification from Ca2+ and Fe3+ using the baromembrane method at a working pressure of 0.6 MPa. The concentration of Ca2+ in aqueous solutions of CaCl2 was 100 mg/dm3, the concentration of Fe3+ in aqueous solutions of FeCl3 was 100 and 36 mg/dm3. The period of time until the establishment of dynamic equilibrium in systems during water purification is 4 hours. The unmodified membranes does not inhibit Ca2+ and Fe3+ at all. After reaching equilibrium the retention factor (R) of Ca2+ during water purification with modified membranes pressure vary from 20 to 28 % and the specific productivity – from 22 to 40 dm3/(m2×h). The retention coefficient of Fe3+, depending on the membranes modifier and concentration of the FeCl3 solutions being purified, is 78 - 99.9 %. The specific productivity in this case is 15 - 52.3 dm3/(m2×h). |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2019 |
| url |
https://ucj.org.ua/index.php/journal/article/view/100 |
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