Temperature effects on the transport of water, uncharged and charged solutes across polymeric nanofiltration membranes
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Even though polymeric nanofiltration (NF) and reverse osmosis (RO) membranes often operate on surface waters and surficial groundwaters whose temperature varies over time and with season, very little detailed mechanistic information on temperature effects on membrane selectivity is available to date. Hence, a study was undertaken to investigate the effects of operating temperature (5 - 41C) on the morphology and structure of two commercially available thin film composite nanofiltration (NF) membranes. This presentation will present recently published results from this study on the influence of temperature on the membranes' active layers. Results will include quantitative information on the structure and morphology including pore size distributions, pore connectivity, and pore number density as well as effective membrane charge density. Apparent activation energy associated with hindered transport of water and neutral solutes of different molecular dimensions will also be reported. 2007 American Water Works Association Membrane Technology Conference All Rights Reserved.
2007 Membrane Technology Conference and Exposition Proceedings
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Sharma, R., & Chellam, S.
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