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Experiments and Modeling of Boric Acid Permeation through Double-Skinned Forward Osmosis Membranes

机译：双层正渗透膜渗透硼酸的实验与建模

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摘要

Boron removal is one of the great challenges in modem wastewater treatment, owing to the unique small size and fast diffusion rate of neutral boric acid molecules. As forward osmosis (FO) membranes with a single selective layer are insufficient to reject boron, double-skinned FO membranes with boron rejection up to 83.9% were specially designed for boron permeation studies. The superior boron rejection properties of double-skinned FO membranes were demonstrated by theoretical calculations, and verified by experiments. The double-skinned FO membrane was fabricated using a sulfonated polyphenylenesulfone (sPPSU) polymer as the hydrophilic substrate and polyamide as the selective layer material via interfacial polymerization on top and bottom surfaces. A strong agreement between experimental data and modeling results validates the membrane design and confirms the success of model prediction. The effects of key parameters on boron rejection, such as boron permeability of both selective layers and structure parameter, were also investigated in-depth with the mathematical modeling. This study may provide insights not only for boron removal from wastewater, but also open up the design of next generation FO membranes to eliminate low-rejection molecules in wider applications.
机译：由于中性硼酸分子独特的小尺寸和快速扩散速率，除硼是现代废水处理中的巨大挑战之一。由于具有单选择层的正渗透（FO）膜不足以排斥硼，因此专门设计用于硼渗透研究的具有高达83.9％的硼排斥率的双层FO膜。通过理论计算证明了双层FO膜具有优异的除硼性能，并通过实验进行了验证。使用磺化聚苯砜（sPPSU）聚合物作为亲水性基材，聚酰胺作为选择性层材料，通过界面聚合在顶表面和底表面上制造了双层FO膜。实验数据与建模结果之间的强烈一致性验证了膜的设计并确认了模型预测的成功。还通过数学模型深入研究了关键参数对硼排斥的影响，例如选择性层的硼渗透率和结构参数。这项研究不仅可以提供从废水中除硼的见识，而且可以为下一代FO膜的设计开辟思路，以消除更广泛应用中的低排斥分子。

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  • 来源
    《Environmental Science & Technology》 |2016年第14期|7696-7705|共10页
  • 作者

    Lin Luo; Zhengzhong Zhou; Tai-Shung Chung; Martin Weber; Claudia Staudt; Christian Maletzko;

  • 作者单位

    NUS Graduate School for Integrative Science and Engineering, National University of Singapore, Singapore 117456,Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585;

    School of Chemistry & Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu Province, P. R. China 212013;

    NUS Graduate School for Integrative Science and Engineering, National University of Singapore, Singapore 117456,Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585;

    Advanced Materials & Systems Research, BASF SE, GM-B001, 67056 Ludwigshafen, Germany;

    Advanced Materials & Systems Research, BASF SE, GM-B001, 67056 Ludwigshafen, Germany;

    Performance Materials, BASF SE, G-PM/PU-F206, 67056 Ludwigshafen, Germany;

  • 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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