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Title: Ancillary effects of surfactants on filtration of low molecular weight contaminants through cellulose nitrate membrane filters
Authors: Olcay, Aybike Nil
Polat, Mehmet
Polat, Hürriyet
Keywords: Filtration
Surface active agents
Issue Date: 5-Mar-2016
Publisher: Elsevier Ltd.
Source: Olcay, A. N., Polat, M. and Polat, H. (2016). Ancillary effects of surfactants on filtration of low molecular weight contaminants through cellulose nitrate membrane filters. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 492, 199-206. doi:10.1016/j.colsurfa.2015.12.032
Abstract: Removal of contaminants with low molecular weight (<800 Dalton) requires the use of advanced separation techniques such as ultrafiltration (UF) or micellar enhanced ultrafiltration (MEUF). However, surface active agents invariably co-exist in waste waters along with these contaminants or they may be added intentionally as part of the separation process as in the case of MEUF. Though it is quite likely that both the filter medium and the contaminants would interact with the surfactant molecules or their micelles, there is not sufficient emphasis in the literature on the concomitant aspects of such interactions.The ancillary effects created by anionic (sodium dodecyl sulfate, SDS), cationic (hexadecyltrimethyl ammonium bromide, CTAB) and non-ionic (ethoxylated octylphenol, TX-100) surfactants on the mechanism and efficiency of the filtration process were investigated in this study. Methylene blue (MB) and cellulose nitrate membrane (CNM) filters were employed as model retentate and the separation medium. A combination of surface tension, contact angle and charge measurements demonstrated that the addition of surfactants had a remarkable effect on the filtration outcome. The effect depended on both the type and concentration of the surfactant and was manifested mainly through the creation of MB-surfactant entities which acted differently than the MB alone; but more importantly, through the interactions of the surfactant molecules/micelles and the MB-surfactant pairs with the separation membrane.
ISSN: 0927-7757
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Chemistry / Kimya
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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