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首页> 外文期刊>Environmental Science & Technology >Advanced Anti-Fouling Membranes for Osmotic Power Generation from Wastewater via Pressure Retarded Osmosis (PRO)
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Advanced Anti-Fouling Membranes for Osmotic Power Generation from Wastewater via Pressure Retarded Osmosis (PRO)

机译：先进的防污膜，用于通过压力延迟渗透（PRO）从废水中渗透渗透发电

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摘要

A facile and versatile approach was demonstrated for the fabrication of low-fouling pressure retarded osmosis (PRO) membranes for osmotic power generation from highly polluted wastewater. A water-soluble zwitterionic random copolymer with superior hydrophilicity and unique chemistry was molecularly designed and synthesized via a single-step free-radical polymerization between 2-methacryloyloxyethyl phosphorylcholine (MPC) and 2-aminoethyl methacrylate hydrochloride (AEMA). The P[MPC-co -AEMA] copolymer was then chemically grafted onto the surface of PES/Torlon hollow fibers via amino groups coupling of poly(AEMA) with the polyimide structures of Torlon, leaving the zwitterions of poly(MPC) in the feed solution. Because of the outstanding hydrophilicity, unique cationic and anionic groups, and electrical neutrality of the zwitterionic brush, the newly developed membrane showed great resistances to both inorganic scaling and organic fouling in PRO operations. When using a real wastewater brine comprising multifoulants as the feed, the P[MPC-co -AEMA] modified membrane exhibits a much lower flux decline of 37% at ΔP = 0 bar after 24-h tests and a smaller power density decrease of 28% at ΔP = 15 bar within 12-h tests, compared to 61% and 42% respectively for the unmodified one. In addition to the low fouling tendency, the modified membrane shows outstanding performance stability and fouling reversibility, where the flux is almost fully recovered by physical backwash of water at 15 bar for 0.5 h. This study provides valuable insights and strategies for the design and fabrication of effective antifouling materials and membranes for PRO osmotic power generation.
机译：事实证明，一种简便且通用的方法可用于制造低污染的压力延迟渗透（PRO）膜，以利用高污染废水进行渗透发电。通过2-甲基丙烯酰氧基乙基磷酰胆碱（MPC）和甲基丙烯酸2-氨基乙酯盐酸盐（AEMA）之间的一步式自由基聚合，分子结构设计并合成了具有优异亲水性和独特化学性质的水溶性两性离子无规共聚物。然后通过聚（AEMA）与Torlon的聚酰亚胺结构的氨基偶联将P [MPC-co-AEMA]共聚物化学接枝到PES / Torlon中空纤维的表面上，从而留下聚（MPC）的两性离子在饲料溶液中。由于两性离子刷具有出色的亲水性，独特的阳离子和阴离子基团以及电中性，因此新开发的膜在PRO操作中对无机结垢和有机污垢均显示出极大的抵抗力。当使用包含多种污染物的实际废水盐水作为进料时，经过24小时的测试后，P [MPC-co-AEMA]改性的膜在ΔP= 0 bar时的通量下降幅度要低得多，为37％。在12小时的测试中，ΔP= 15 bar时，功率密度降低了28％，而未修改的功率密度分别降低了61％和42％。除了低结垢趋势外，改性膜还具有出色的性能稳定性和结垢可逆性，通过在15巴下对水进行0.5 h的物理反冲洗几乎可以完全恢复通量。这项研究为设计和制造用于PRO渗透发电的有效防污材料和膜提供了宝贵的见识和策略。

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  • 来源
    《Environmental Science & Technology》 |2018年第11期|6686-6694|共9页
  • 作者

    Gang Han; Jiang Tao Liu; Kang Jia Lu; Tai-Shung Chung;

  • 作者单位

    Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585;

    Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585;

    Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585;

    Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585;

  • 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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