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首页> 外文期刊>Environmental Science & Technology >A Novel Multi-Charged Draw Solute That Removes Organic Arsenicals from Water in a Hybrid Membrane Process
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A Novel Multi-Charged Draw Solute That Removes Organic Arsenicals from Water in a Hybrid Membrane Process

机译：一种新型的多电荷汲取溶质，可通过混合膜工艺从水中去除有机砷。

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摘要

The potential of forward osmosis for water treatment can only be maximized with suitable draw solutes. Here a three-dimensional, multicharge draw solute of decasodium phytate (Na_(10)-phytate) is designed and synthesized for removing organic arsenicals from water using a hybrid forward osmosis (FO) – membrane distillation (MD) process. Efficient water recovery is achieved using Na_(10)-phytate as a draw solute with a water flux of 20.0 LMH and negligible reverse solute diffusion when 1000 ppm organic arsenicals as the feed and operated under ambient conditions with FO mode. At 50 °C, the novel draw solute increases water flux by more than 30% with water fluxes higher than 26.0 LMH on the FO side, drastically enhancing water recovery efficiency. By combining the FO and MD processes into a single hybrid process, a 100% recovery of Na_(10)-phytate draw solute was achieved. Crucially, organic arsenicals or Na_(10)-phytate draw solutes are both rejected 100% and not detected in the permeate of the hybrid process. The complete rejection of both organic arsenicals and draw solutes using hybrid membrane processes is unprecedented; creating a new application for membrane separations.
机译：只有使用合适的抽取溶质，才能使正向渗透水处理的潜力最大化。在这里，设计并合成了三维多电荷植酸癸酸钠（Na_（10）-植酸）溶质，使用混合正渗透（FO）–膜蒸馏（MD）工艺从水中去除有机砷。当使用1000 ppm有机砷作为进料并在环境条件下以FO模式运行时，使用Na_（10）-植酸盐作为抽提溶质，水通量为20.0 LMH，溶质反向扩散可忽略不计，可以实现有效的水回收。在50°C时，新型吸取溶质将水通量提高了30％以上，而FO侧的水通量高于26.0 LMH，极大地提高了水的回收效率。通过将FO和MD过程组合到单个混合过程中，可以实现Na_（10）-植酸盐提取溶质的100％回收率。至关重要的是，有机砷或Na_（10）-植酸盐汲取溶质都被100％拒绝，并且在混合过程的渗透液中未检测到。使用混合膜工艺完全排除有机砷和抽提溶质是前所未有的。创造了膜分离的新应用。

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  • 来源
    《Environmental Science & Technology》 |2018年第6期|3812-3819|共8页
  • 作者

    Qingchun Ge; Cher Hon Lau; Minghua Liu;

  • 作者单位

    College of Environment and Resources, Fuzhou University, Fujian 350116, China;

    School of Engineering, The University of Edinburgh, Robert Stevenson Road, The King’s Buildings, Edinburgh, EH9 3FB, Scotland, U.K.;

    College of Environment and Resources, Fuzhou University, Fujian 350116, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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