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首页> 外文期刊>RSC Advances >Efficient activation of persulfate by Fe3O4@beta-cyclodextrin nanocomposite for removal of bisphenol A
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Efficient activation of persulfate by Fe3O4@beta-cyclodextrin nanocomposite for removal of bisphenol A

机译：用Fe3O4β-环糊精纳米复合物去除双酚A的过硫酸盐的有效活化

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摘要

Experimental studies were conducted to investigate the degradation of bisphenol A (BPA) by using persulfate (PS) as the oxidant and Fe3O4@-cyclodextrin (-CD) nanocomposite as a heterogeneous activator. The catalytic activity was evaluated in consideration of the effect of various parameters, such as pH value, PS concentration and Fe3O4@-CD load. The results showed that 100% removal of BPA was gained at pH 3.0 with 5 mM PS, 1.0 g L-1 Fe3O4@-CD, and 0.1 mM BPA in 120 min. Further, the catalytic activity of Fe3O4@-CD nanocomposite was observed as much higher when compared with Fe3O4 nanoparticles alone. The sulfate and hydroxyl radicals referred to in the Fe3O4@-CD/PS system were determined as the reactive species responsible for the degradation of BPA by radical quenching and electron spin resonance (ESR) tests. In addition, the catalyst also possessed with accepted reusability and stability. On the basis of the results of the effect of chloride ions (Cl-), -CD was found to play a crucial role in reducing interference from Cl- ions, and lead to achieve higher removal efficiency for BPA in Fe3O4@-CD/PS system. A possible mechanistic process of BPA degradation was proposed according to the identified intermediates by gas chromatography-mass spectroscopy (GC-MS).
机译：进行实验研究以研究双酚A（BPA）的脱硫（PS）作为氧化剂和Fe3O4 @ -cyclodextrin（-Cd）纳米复合材料作为非均相激活剂。考虑到各种参数的效果，例如pH值，PS浓度和Fe3O4 @ -Cd载荷，评价催化活性。结果表明，在pH 3.0中获得100％的BPA，用5mm PS，1.0g L-1 Fe3O4 -Cd和120分钟的0.1mM BPA。此外，与单独的Fe3O4纳米颗粒相比，观察到Fe3O4 -Cd纳米复合材料的催化活性。在Fe3O4 @ -Cd / PS系统中提到的硫酸盐和羟基自由基被确定为负责通过自由基淬火和电子自旋共振（ESR）测试的BPA降解的反应性物质。此外，催化剂还具有可接受的可重用性和稳定性。在氯离子（CL-）的影响的结果的基础上，发现-Cd在减少离子干扰方面发挥至关重要作用，并导致Fe3O4 @ -Cd / PS中BPA的更高的去除效率系统。根据通过气相色谱 - 质谱（GC-MS）所鉴定的中间体提出了BPA降解的可能机械过程。

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  • 来源
    《RSC Advances》 |2018年第27期|共9页
  • 作者

    Zhu Yanyan; Yue Min; Natarajan Vinothkumar; Kong Lingshuai; Ma Long; Zhang Yuqiang; Zhao Quanqin; Zhan Jinhua;

  • 作者单位

    Shandong Univ Dept Chem Educ Minist Key Lab Colloid &

    Interface Chem Jinan 250100 Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Jinan 250100 Peoples R China;

    Shandong Univ Dept Chem Educ Minist Key Lab Colloid &

    Interface Chem Jinan 250100 Peoples R China;

    Shandong Univ Dept Chem Educ Minist Key Lab Colloid &

    Interface Chem Jinan 250100 Peoples R China;

    China Met Geol Bur Shandong Bur Testing Ctr Jinan 250100 Peoples R China;

    China Met Geol Bur Shandong Bur Testing Ctr Jinan 250100 Peoples R China;

    Shandong Univ Dept Chem Educ Minist Key Lab Colloid &

    Interface Chem Jinan 250100 Peoples R China;

    Shandong Univ Dept Chem Educ Minist Key Lab Colloid &

    Interface Chem Jinan 250100 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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