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首页> 外文期刊>Journal of Hazardous Materials >Degradation of high concentration 2,4-dichlorophenol by simultaneous photocatalytic-enzymatic process using TiO_2/UV and laccase
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Degradation of high concentration 2,4-dichlorophenol by simultaneous photocatalytic-enzymatic process using TiO_2/UV and laccase

机译：TiO_2 / UV和漆酶同时光催化酶法降解高浓度2,4-二氯苯酚

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摘要

Removal of 2,4-dichlorophenol (2,4-DCP) by TiO_2/UV photocatalytic, laccase, and simultaneous photocatalytic-enzymatic treatments were investigated. Coupling of native laccase with TiO_2/UV showed a negative synergetic effect due to the rapid inactivation of laccase. Immobilizing laccase covalently to controlled porous glass (CPG) effectively enhanced the stability of laccase against TiO_2/UV induced inactivation. By coupling CPG-laccase with the TiO_2/UV the degradation efficiency of 2,4-DCP was significantly increased as compared with the results obtained when immobilized laccase or TiO_2/UV were separately used. Moreover, the enhancement was more remarkable for the degradation of 2,4-DCP with high concentration, such that for the degradation of 5 mM 2,4-DCP, 90% removal percentage was achieved within 2 h with the coupled degradation process. While for the TiO_2/UV and CPG-laccase process, the removal percentage of 2,4-DCP at 2 h were only 26.5% and 78.1 %, respectively. The degradation kinetics were analyzed using a intermediate model by taking into account of the intermediates formed during the degradation of 2,4-DCP. The high efficiency of the coupled degradation process therefore provided a novel strategy for degradation of concentrated 2,4-DCP. Furthermore, a thermometric biosensor using the immobilized laccase as biorecognition element was constructed for monitoring the degradation of 2,4-DCP, the result indicated that the biosensor was precise and sensitive.
机译：研究了TiO_2 / UV光催化，漆酶和同时光催化酶处理对2,4-二氯苯酚（2,4-DCP）的去除。由于漆酶的快速失活，天然漆酶与TiO_2 / UV的偶联显示出负的协同作用。将漆酶共价固定在可控多孔玻璃（CPG）上可有效增强漆酶抵抗TiO_2 / UV诱导的失活的稳定性。通过将CPG-漆酶与TiO_2 / UV偶联，与分别使用固定化漆酶或TiO_2 / UV时获得的结果相比，2,4-DCP的降解效率显着提高。此外，对于高浓度的2,4-DCP降解，其增强作用更为显着，因此，对于5 mM 2,4-DCP的降解，通过耦合降解过程，在2小时内可达到90％的去除率。而对于TiO_2 / UV和CPG-漆酶工艺，在2 h时2,4-DCP的去除率分别仅为26.5％和78.1％。考虑到在2,4-DCP降解过程中形成的中间体，使用中间体模型分析了降解动力学。因此，偶联降解过程的高效率为浓缩2,4-DCP的降解提供了一种新颖的策略。此外，构建了以固定化漆酶为生物识别元件的温度生物传感器，用于监测2,4-DCP的降解，结果表明该传感器准确，灵敏。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第29期|p.150-155|共6页
  • 作者

    Jingbo Jia; Songping Zhang; Ping Wang; Huajun Wang;

  • 作者单位

    National Key Laboratory of Biochemical Engineering, Institute of Process Engineering. Chinese Academy of Sciences, Beijing 100190, PR China,Department of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China;

    National Key Laboratory of Biochemical Engineering, Institute of Process Engineering. Chinese Academy of Sciences, Beijing 100190, PR China;

    National Key Laboratory of Biochemical Engineering, Institute of Process Engineering. Chinese Academy of Sciences, Beijing 100190, PR China;

    Department of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China;

  • 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

    2,4-dichlorophenol; degradation; photocatalysis; TiO_2; laccase;

    机译：2,4-二氯苯酚;降解;光催化;TiO_2;漆酶;

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