Plasma treatment of polyethersulfone membrane for benzene removal from water by air gap membrane distillation

Abstract : In order to obtain a durable cost-effective membrane for membrane distillation (MD) process, flat sheet polyethersulfone (PES) membranes were modified by an atmospheric pressure nonequilibrium plasma generated using a dielectric barrier discharge in a mixture of argon and hexamethyldisiloxane as the organosilicon precursor. The surface properties of the plasma-modified membranes were characterized by water contact angle (CA), liquid entry pressure, X-ray photoelectron spectroscopy, scanning electron microscopy, and atomic force microscopy. The water CA of the membrane was increased from 64° to 104° by depositing a Si(CH3)-rich thin layer. While the pristine PES membrane was not applicable in the MD process, the modified PES membrane could be applied for the first time in an air gap membrane distillation setup for the removal of benzene as a volatile organic compound from water. The experimental design using central composite design and response surface methodology was applied to study the effects of feed temperature, concentration, and flow rate as well as their binary interactions on the overall permeate flux and separation factor. The separation factor and permeation flux of the modified PES membrane at optimum conditions were comparable with those of commercial polytetrafluoroethylene membrane.
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Article dans une revue
Environmental Technology, Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2018, 39 (2), pp.157-171. 〈10.1080/09593330.2017.1296896〉
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http://hal.upmc.fr/hal-01610139
Contributeur : Véronique Martin <>
Soumis le : mercredi 4 octobre 2017 - 14:47:53
Dernière modification le : jeudi 11 janvier 2018 - 06:25:45

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Sara Pedram, Hamid Reza Mortaheb, Farzaneh Arefi-Khonsari. Plasma treatment of polyethersulfone membrane for benzene removal from water by air gap membrane distillation. Environmental Technology, Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2018, 39 (2), pp.157-171. 〈10.1080/09593330.2017.1296896〉. 〈hal-01610139〉

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