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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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ph及盐对dk纳滤膜性能的影响
DOI: 10.3969/j.issn.1671-7627.2013.06.009, PP. 43-47
Keywords: 纳滤,膜性能,ph,盐,等效荷电密度
Abstract:
采用dk纳滤膜进行电解质kcl-mgcl2水溶液纳滤实验,考察ph、盐浓度及类型对纳滤膜性能的影响。通过道南细孔-介电(dspm-de)模型计算等效荷电密度(xd),研究dk纳滤膜表面电荷与性能之间的关系。通过dspm模型拟合不同ph条件下葡萄糖截留数据表征膜的结构性质。结果表明:膜的等效膜孔(rp)和等效膜厚(symbolda@x/ak)数值在碱性条件下大于酸性及中性的;kcl的截留率随盐浓度增加而减小,ph为4.0时截留率最小;mgcl2的截留率随盐浓度增加而增大,随ph增大而减小。模型分析发现xd取决于ph、盐浓度及类型;对kcl和mgcl22种溶液,膜性能取决于所对应条件下xd的大小。
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