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Reversible adsorption inside pores of ultrafiltration membranes

Churaev, N. V., Holdich, R. G., Prokopovich, Polina, Starov, V. M. and Vasin, S. I. 2005. Reversible adsorption inside pores of ultrafiltration membranes. Journal of Colloid and Interface Science 288 (1) , pp. 205-212. 10.1016/j.jcis.2005.02.072

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A range of experiments were performed on the dead-end ultrafiltration (UF) of poly(ethylene glycol) (PEG) of different molecular weights. Deviations from a linear dependence of the filtration rate with the applied membrane pressure difference were found. It is shown that these deviations are not caused by an osmotic pressure influence but determined by the reversible adsorption of PEG molecules inside the pores of the ultrafiltration membranes used. A theoretical model of the process is suggested, which describes the reversible adsorption inside the membrane pores and the corresponding reduction of the filtration velocity. Comparison of the theory predictions with experimental data on the ultrafiltration of PEG shows a good agreement between the theoretical predictions and experimental data. A theory is presented for calculation of the PEG rejection coefficient in the case of ultrafiltration.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: Q Science > QD Chemistry
R Medicine > RS Pharmacy and materia medica
Uncontrolled Keywords: Reversible adsorption; Ultrafiltration; Permeability
Publisher: Elsevier
ISSN: 0021-9797
Last Modified: 03 Sep 2019 08:26

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