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    题名: Ionic Separation Efficiency of a Novel Electric-Field-Assisted Membrane Module Comprising an Array of Microchannel Units
    作者: Hsu, Jyh-ping;Lin, S. H.;曾琇瑱;Tseng, Shio-jenn;Su, A;Lee, D. J.;Chen, C. J.
    贡献者: 淡江大學數學學系
    关键词: Microchannel unit;Charged membrane layer;Ionic separation efficiency;Debye–Hückel approximation;Valence type of electrolyte
    日期: 2007-03-15
    上传时间: 2010-01-28 07:11:53 (UTC+8)
    出版者: Elsevier
    摘要: The ionic separation efficiency of a novel membrane module comprising an array of microchannel units is analyzed. Under the Debye–Hückel approximation, we derive a semianalytical expression for the ionic separation efficiency. Analyses reveal that the effects of the size of the microchannel, the fixed charge density in the membrane layer, and the permittivity of the membrane layer on ionic separation efficiency depend strongly on the valence type of electrolyte in treated water. Under the condition of a symmetric electrolyte, the ionic separation efficiency is found to be about unity and unresponsive to variation of system parameters. If the valence of the cation is higher than that of the anion, the ionic separation efficiency is larger than unity, and decreases to unity as the size of the microchannel increases. In contrast, if the valence of the cation is lower than that of the anion, the ionic separation efficiency is smaller than unity and increases to unity as the size of the microchannel increases. Under the latter two conditions, the effects of both fixed charge density in the membrane layer and permittivity of the membrane layer on the ionic separation efficiency are found to be reversed.
    關聯: Journal of Colloid and Interface Science 307(2), pp.516-523
    DOI: 10.1016/j.jcis.2006.11.043
    显示于类别:[數學學系暨研究所] 期刊論文

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