...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Mitigation of Thin-Film Composite Membrane Biofouling via Immobilizing Nano-Sized Biocidal Reservoirs in the Membrane Active Layer
【24h】

Mitigation of Thin-Film Composite Membrane Biofouling via Immobilizing Nano-Sized Biocidal Reservoirs in the Membrane Active Layer

机译：通过在膜活性层中固定纳米级生物杀灭剂来减轻薄膜复合膜的生物污染

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This work investigates the use of a silver-based metal-organic framework (MOF) for mitigating biofouling in forward-osmosis thin-film composite (TFC) membranes. This is the first study of the use of MOFs for biofouling control in membranes. MOF nanocrystals were immobilized in the active layer of the membranes via dispersion in the organic solution used for interfacial polymerization. Field emission scanning electron microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS) characterization results showed the presence of the MOF nanocrystals in the active layer of the membranes. The immobilization improved the membrane active layer in terras of hydrophilicity and transport properties without adversely affecting the selectivity. It imparted antibacterial activity to the membranes； the number of live bacteria attached to the membrane surfece was over 90% less than that of control membranes. Additionally, the MOF nanocrystals provided biocidal activity that lasted for 6 months. The immobilization improved biofouling resistance in the membranes, whose flux had a decline of 8% after 24 h of operation in biofouling experiments, while that of the control membranes had a greater decline of 〜21%, The better biofouling resistance is due to simultaneous improvement of antiadhesive and antimicrobial properties of the membranes. Fluorescence microscopy and FE-SEM indicated simultaneous improvement in antiadhesive and antimicrobial properties of the TFN membranes, resulting in limited biofilm formation.
机译：这项工作研究了使用银基金属有机骨架（MOF）来缓解正向渗透薄膜复合材料（TFC）膜中的生物污染。这是将MOF用于膜生物污染控制的首次研究。 MOF纳米晶体通过分散在用于界面聚合的有机溶液中固定在膜的活性层中。场发射扫描电子显微镜（FE-SEM）和X射线光电子能谱（XPS）表征结果表明，在膜的活性层中存在MOF纳米晶体。固定化改善了膜活性层的亲水性和传输性能，而没有不利地影响选择性。它赋予了膜抗菌活性；附着在膜表面的活细菌数量比对照膜少90％以上。另外，MOF纳米晶体具有持续6个月的杀菌活性。固定化提高了膜的抗生物污损性，在生物污损实验中，膜通量在运行24小时后下降了8％，而对照膜的通量下降了约21％。膜的抗粘连和抗菌性能荧光显微镜和FE-SEM表明，TFN膜的抗黏附和抗微生物特性同时得到改善，导致生物膜形成受限。

著录项

  • 来源
    《Environmental Science & Technology》 |2017年第10期|5511-5522|共12页
  • 作者

    Alireza Zirehpour; Ahmad Rahimpour; Ahmad Arabi Shamsabadi; Mohammad Sharifian; Masoud Soroush;

  • 作者单位

    Department of Chemical Engineering, Babol Noushirvani University of Technology, Shariati Avenue, Babol 47148-71167, Iran;

    Department of Chemical Engineering, Babol Noushirvani University of Technology, Shariati Avenue, Babol 47148-71167, Iran;

    Department of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States;

    Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States;

    Department of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States;

  • 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
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号