The influence of the preparation factors such as casting solution composition, different methods of coal modification, evaporation time of solvent and their optimization on performance of cellulose acetate heterogeneous reverse osmosis membranes have been studied. Three types of membranes were made from a blend of cellulose acetate (CA) and coal by weight ratios 1:1.5, 1:1.75 and 1:2. The powdered coal was modified with nitric acid and aryl diazonium salts in acetonitrile medium at constant modification time. The membranes were prepared by phase inversion process from a casting solution of cellulose acetate-coal and magnesium perchlorate in acetone water mixture at varying evaporation time of solvent at constant temperature using the same gelation medium. The composition of raw and modified coals was examined by IR spectroscopy. Membranes obtained with a casting solution composition of cellulose acetate-coal in weight ratios of 1:1.5 and 1:1.75, modified coals and longer evaporation time of solvent showed the best performance.
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Research Article|
December 01 2011
Study of the optimization factors for preparation of heterogeneous reverse osmosis membranes Available to Purchase
S. T. Gashi;
1Department of Chemistry, Faculty of Natural Sciences, University of Prishtina, Nëna Tereze no 5, 10 000 Prishtinë, Republic of Kosovo
E-mail: [email protected]
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T. Selimi;
T. Selimi
1Department of Chemistry, Faculty of Natural Sciences, University of Prishtina, Nëna Tereze no 5, 10 000 Prishtinë, Republic of Kosovo
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B. S. Thaçi;
B. S. Thaçi
1Department of Chemistry, Faculty of Natural Sciences, University of Prishtina, Nëna Tereze no 5, 10 000 Prishtinë, Republic of Kosovo
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A. Dylhasi
A. Dylhasi
1Department of Chemistry, Faculty of Natural Sciences, University of Prishtina, Nëna Tereze no 5, 10 000 Prishtinë, Republic of Kosovo
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Water Supply (2011) 11 (6): 647–653.
Article history
Received:
December 22 2010
Accepted:
June 03 2011
Citation
S. T. Gashi, T. Selimi, B. S. Thaçi, A. Dylhasi; Study of the optimization factors for preparation of heterogeneous reverse osmosis membranes. Water Supply 1 December 2011; 11 (6): 647–653. doi: https://doi.org/10.2166/ws.2011.056
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