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首页> 外文期刊>Frontiers of environmental science & eng >Influence of pore size and membrane surface properties on arsenic removal by nanofiltration membranes
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Influence of pore size and membrane surface properties on arsenic removal by nanofiltration membranes

机译：孔径和膜表面特性对纳滤膜去除砷的影响

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摘要

Nanofiltration (NF) has a great potential in removing arsenate from contaminated water. The performance including arsenate rejection, water permeability and resistance to fouling could however differ substantially among NF membranes. This study was conducted to investigate the influence of membrane pore size and surface properties on these aspects of membrane performance. Four fullyaromatic NF membranes with different physicochemical properties were adopted for this study. The results showed that surface charge, hydrophobicity, roughness and pore size could affect water permeability and/or arsenate rejection considerably. A more negative surface charge was desirable to enhance arsenate rejection rates. NF90 and a non-commercialized membrane (M#1) demonstrated the best performance in terms of arsenate rejection and water permeability. The M#1 membrane showed less membrane fouling than NF90 when used for filtration of real arsenic-containing groundwater. This was mainly due to its distinct chemical composition and surface properties. A severe membrane fouling could lead to a substantial reduction of arsenic rejection. The M#1 membrane showed the best performance, which indicated that membrane modification could indeed enhance the overall membrane performance for water treatment.
机译：纳滤（NF）在去除污水中的砷化物方面具有巨大潜力。然而，包括砷酸盐排斥，水渗透性和抗结垢性在内的性能在NF膜之间可能存在很大差异。进行这项研究以研究膜孔径和表面性质对膜性能这些方面的影响。本研究采用四种具有不同理化性质的全芳族NF膜。结果表明，表面电荷，疏水性，粗糙度和孔径可显着影响水的渗透性和/或砷的排出。需要更多的负表面电荷来提高砷酸盐的排斥率。 NF90和非商业化膜（M＃1）在砷酸盐排斥和水渗透性方面表现出最佳性能。当用于过滤含砷的地下水时，M＃1膜比NF90膜污染小。这主要是由于其独特的化学组成和表面性质。严重的膜污染可能会导致砷排斥率大大降低。 M＃1膜表现出最佳性能，这表明膜改性确实可以增强水处理的整体膜性能。

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  • 来源
    《Frontiers of environmental science & eng》 |2019年第2期|19.1-19.8|共8页
  • 作者

    Tanne Nathalie; Xu Rui; Zhou Mingyue; Zhang Pan; Wang Xiaomao; Wen Xianghua;

  • 作者单位

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Arsenate; Nanofiltration; Drinking water; Membrane property; Membrane fouling;

    机译：砷酸盐纳滤饮用水膜性质膜污染;

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