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首页> 外文期刊>Environmental Science & Technology >A New-Generation Asymmetric Multi-Bore Hollow Fiber Membrane for Sustainable Water Production via Vacuum Membrane Distillation
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A New-Generation Asymmetric Multi-Bore Hollow Fiber Membrane for Sustainable Water Production via Vacuum Membrane Distillation

机译：新一代不对称多孔中空纤维膜，可通过真空膜蒸馏持续生产水

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摘要

Due to the growing demand for potable water, the capacities for wastewater reclamation and saline water desalination have been increasing. More concerns are raised on the poor efficiency of removing certain contaminants by the current water purification technologies. Recent studies demonstrated superior separation performance of the vacuum membrane distillation (VMD) technology for the rejection of trace contaminants such as boron, dye, endocrine-disruptive chemical, and chloro-compound. However, the absence of suitable membranes with excellent wetting resistance and high permeation flux has severely hindered the VMD application as an effective water production process. This work presents a new generation multibore hollow fiber (MBF) membrane with excellent mechanical durability developed for VMD. Its micromorphology was uniquely designed with a tight surface and a fully porous matrix to maximize both high wetting resistance and permeation flux. Credit to the multibore configuration, a 65% improvement was obtained on the antiwetting property. Using a synthetic seawater feed, the new membrane with optimized fabrication condition exhibits a high flux and the salt rejection is consistently greater than 99.99%. In addition, a comparison of 7-bore and 6-bore MBF membranes was performed to investigate the optimum geometry design. The newly designed MBF membrane not only demonstrates its suitability for VMD but also makes VMD come true as an efficient process for water production.
机译：由于对饮用水的需求不断增长，废水回收和盐水淡化的能力一直在增加。当前的水净化技术对去除某些污染物的效率低下引起了更多的关注。最近的研究表明，真空膜蒸馏（VMD）技术具有出色的分离性能，可去除痕量污染物，如硼，染料，破坏内分泌的化学物质和氯化合物。然而，缺少具有优异的抗湿性和高渗透通量的合适的膜严重地阻碍了VMD作为有效的水生产过程的应用。这项工作展示了为VMD开发的具有优异机械耐久性的新一代多孔中空纤维（MBF）膜。它的微观形态经过独特设计，具有紧密的表面和完全多孔的基质，可最大限度地提高高抗湿性和渗透通量。归功于多孔结构，抗湿性提高了65％。使用合成海水饲料，具有优化制造条件的新型膜表现出高通量，并且脱盐率始终大于99.99％。此外，对7孔和6孔MBF膜进行了比较，以研究最佳的几何设计。新设计的MBF膜不仅展示了其对VMD的适用性，而且使VMD作为高效的水生产工艺得以实现。

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  • 来源
    《Environmental Science & Technology》 |2013年第12期|6272-6278|共7页
  • 作者

    Peng Wang; Tai-Shung Chung;

  • 作者单位

    Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singapore;

    Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singapore;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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