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首页> 外文期刊>RSC Advances >An environmentally-friendly enzyme-based nanofibrous membrane for 3,3 ',5,5 '-tetrabromobisphenol removal
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An environmentally-friendly enzyme-based nanofibrous membrane for 3,3 ',5,5 '-tetrabromobisphenol removal

机译：一种环保型酶的纳米纤维膜，用于3,3'，5,5'-溴二苯酚去除

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摘要

Chitosan (CS)/poly(vinyl alcohol) (PVA) nanofibrous membranes have inherently poor mechanical strength. To improve the mechanical strength of these membranes, nanocrystalline cellulose (NCC) prepared by a simplified method was added to the former system. The results showed that the tensile strength of the membrane with 5% NCC addition was 370% higher than that of the membrane without NCC. Horseradish peroxidase (HRP) was immobilized on the membrane through covalent binding with HRP previously activated with 1,1'-carbonyldiimidazole, and the maximum enzyme loading was approximately 384 mg g(-1). The physical, chemical properties of immobilized HRP and its application in 3,3 ',5,5 '-tetrabromobisphenol (TBBPA) removal were examined. The results showed that HRP immobilized on CS/PVA-NCC membranes showed greater stability and reusability than free HRP and the membrane without NCC. The former also exhibited an effective performance (95.9% removal, 3 h) for TBBPA removal under the optimum conditions (pH 7, 35 degrees C). The results showed that HRP immobilized on NCC-incorporated CS/PVA membranes could be used to remove brominated flame-retardants, especially TBBPA from wastewater. Thus, these membranes have potential industrial applications.
机译：壳聚糖（Cs）/聚（乙烯醇）（PVA）纳米纤维膜具有固有的机械强度。为了提高这些膜的机械强度，将通过简化方法制备的纳米晶纤维素（NCC）加入到前系统中。结果表明，具有5％NCC添加的膜的拉伸强度比没有NCC的膜的拉伸率高370％。通过用先前用1,1'-碳红堇唑激活的HRP与HRP的共价结合固定在膜上的辣根过氧化物酶（HRP），最大酶负载约为384mg（-1）。检查了固定的HRP的物理，化学性质及其在3,3'，5,5'-溴二苯酚（TBBPA）中的应用。结果表明，在CS / PVA-NCC膜上固定的HRP显示出比游离HRP和没有NCC的膜更大的稳定性和可重用性。前者还表现出有效的性能（95.9％去除3小时，3小时，用于在最佳条件下去除TBBPA（pH7,35℃）。结果表明，固定在NCC掺入的Cs / PVA膜上的HRP可用于除去溴化阻燃剂，特别是来自废水的TBBPA。因此，这些膜具有潜在的工业应用。

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  • 来源
    《RSC Advances》 |2015年第79期|共7页
  • 作者

    Xu Ran; Tang Rongzhi; Liu Sijia; Li Fengting; Zhang Bingru;

  • 作者单位

    Tongji Univ Coll Environm Sci &

    Engn State Key Lab Pollut Control &

    Resource Reuse Shanghai 200092 Peoples R China;

    Tongji Univ Coll Environm Sci &

    Engn State Key Lab Pollut Control &

    Resource Reuse Shanghai 200092 Peoples R China;

    Tongji Univ Coll Environm Sci &

    Engn State Key Lab Pollut Control &

    Resource Reuse Shanghai 200092 Peoples R China;

    Tongji Univ Coll Environm Sci &

    Engn State Key Lab Pollut Control &

    Resource Reuse Shanghai 200092 Peoples R China;

    Tongji Univ Coll Environm Sci &

    Engn State Key Lab Pollut Control &

    Resource Reuse Shanghai 200092 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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