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Mn2+协同Fe3+-EDTA在中性pH条件下催化类Fenton降解水中卡马西平

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李怡帆, 孙剑辉, 孙胜鹏. Mn2+协同Fe3+-EDTA在中性pH条件下催化类Fenton降解水中卡马西平[J]. 环境化学, 2017, 36(11): 2319-2324. doi: 10.7524/j.issn.0254-6108.2017040502
引用本文: 李怡帆, 孙剑辉, 孙胜鹏. Mn2+协同Fe3+-EDTA在中性pH条件下催化类Fenton降解水中卡马西平[J]. 环境化学, 2017, 36(11): 2319-2324. doi: 10.7524/j.issn.0254-6108.2017040502
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LI Yifan, SUN Jianhui, SUN Shengpeng. Degradation of carbamazepine in aqueous solutions by Mn2+-mediated Fenton-like reaction of Fe3+-EDTA complex at neutral pH[J]. Environmental Chemistry, 2017, 36(11): 2319-2324. doi: 10.7524/j.issn.0254-6108.2017040502
Citation: LI Yifan, SUN Jianhui, SUN Shengpeng. Degradation of carbamazepine in aqueous solutions by Mn2+-mediated Fenton-like reaction of Fe3+-EDTA complex at neutral pH[J]. Environmental Chemistry, 2017, 36(11): 2319-2324. doi: 10.7524/j.issn.0254-6108.2017040502
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Mn2+协同Fe3+-EDTA在中性pH条件下催化类Fenton降解水中卡马西平

  • 1.

    河南师范大学环境学院, 黄淮水环境与污染防治教育部重点实验室, 河南省环境污染控制重点实验室, 新乡, 453007;

  • 2.

    苏州大学材料与化学化工学部, 化工与环境工程学院, 苏州市绿色化工重点实验室, 苏州, 215123

  • 基金项目:

    河南省创新型科技人才队伍建设工程-河南省科技创新杰出人才计划（134200510014）和江苏省自然科学基金青年基金（BK20140341）资助.

Degradation of carbamazepine in aqueous solutions by Mn2+-mediated Fenton-like reaction of Fe3+-EDTA complex at neutral pH

  • 1.

    Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, 453007, China;

  • 2.

    Suzhou Key Laboratory of Green Chemical Engineering, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China

  • Fund Project: Supported by the Innovation Scientists and Technicians Troop Construction Projects of Henan Province, Plan for Scientific Innovation Talent of Henan Province (134200510014) and the Natural Science Foundation of Jiangsu Province (BK20140341).

  • 摘要: 研究了Mn2+协同Fe3+-EDTA络合体催化类Fenton反应，在中性pH条件下对水中新兴污染物卡马西平的降解情况.考察了Mn2+∶Fe3+、EDTA∶Fe3+和H2O2∶Fe3+的物质的量比率、Fe3+浓度和初始pH等关键因素对卡马西平降解效果的影响.结果表明，共存Mn2+能够显著增强Fe3+-EDTA络合体催化类Fenton反应体系的氧化能力.在0.1 mmol·L-1Fe3+、EDTA∶Fe3+为2∶1、Mn2+∶Fe3+为1∶1、H2O2∶Fe3+为150∶1和pH 7.0的条件下，经过20 min反应时间，卡马西平的降解率能够达到100%，表观降解速率常数达到0.6374 min-1.其增效机理是通过Mn2+-EDTA与H2O2反应促进O2·-的产生，进而加速还原Fe3+-EDTA至Fe2+-EDTA，间接提高HO·的产生速率.研究结果能够为水中卡马西平的有效去除提供参考.
    Abstract: The present study investigated the degradation of an emerging pollutant carbamazepine in aqueous solutions by Mn2+-mediated Fenton-like reaction of Fe3+-EDTA complex at neutral pH conditions. The effects of Mn2+:Fe3+, EDTA:Fe3+ and H2O2:Fe3+molar ratios, Fe3+ concentration and initial pH on the degradation efficiency of carbamazepine were evaluated. The results showed that the presence of Mn2+ enhanced the Fenton-like reaction of Fe3+-EDTA complex significantly. Under the conditions of[Fe3+]=0.1 mmol·L-1, EDTA:Fe3+=2:1, Mn2+:Fe3+=1:1, H2O2:Fe3+=150:1 and pH 7.0, the degradation efficiency of carbamazepine reached 100% after 20 min of reaction time and the corresponding reaction rate constant was 0.6374 min-1. The mechanism for the enhanced Fenton-like reaction involved the generation of superoxide radical (O2·-) from the reaction of Mn2+-EDTA complex with H2O2, which increased the regeneration rate of Fe2+-EDTA and indirectly improved the generation rate of HO·. The results provide guidance for the effective treatment of carbamazepine in water.
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  • 收稿日期:  2017-04-05
  • 刊出日期:  2017-11-15

Mn2+协同Fe3+-EDTA在中性pH条件下催化类Fenton降解水中卡马西平

  • 1.  河南师范大学环境学院, 黄淮水环境与污染防治教育部重点实验室, 河南省环境污染控制重点实验室, 新乡, 453007;
  • 2.  苏州大学材料与化学化工学部, 化工与环境工程学院, 苏州市绿色化工重点实验室, 苏州, 215123
  • 收稿日期:  2017-04-05
基金项目:

河南省创新型科技人才队伍建设工程-河南省科技创新杰出人才计划（134200510014）和江苏省自然科学基金青年基金（BK20140341）资助.

摘要: 研究了Mn2+协同Fe3+-EDTA络合体催化类Fenton反应，在中性pH条件下对水中新兴污染物卡马西平的降解情况.考察了Mn2+∶Fe3+、EDTA∶Fe3+和H2O2∶Fe3+的物质的量比率、Fe3+浓度和初始pH等关键因素对卡马西平降解效果的影响.结果表明，共存Mn2+能够显著增强Fe3+-EDTA络合体催化类Fenton反应体系的氧化能力.在0.1 mmol·L-1Fe3+、EDTA∶Fe3+为2∶1、Mn2+∶Fe3+为1∶1、H2O2∶Fe3+为150∶1和pH 7.0的条件下，经过20 min反应时间，卡马西平的降解率能够达到100%，表观降解速率常数达到0.6374 min-1.其增效机理是通过Mn2+-EDTA与H2O2反应促进O2·-的产生，进而加速还原Fe3+-EDTA至Fe2+-EDTA，间接提高HO·的产生速率.研究结果能够为水中卡马西平的有效去除提供参考.

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