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首页> 外文期刊>Journal of Hazardous Materials >Oxidative degradation of organic pollutants in aqueous solution using zero valent copper under aerobic atmosphere condition
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Oxidative degradation of organic pollutants in aqueous solution using zero valent copper under aerobic atmosphere condition

机译：需氧条件下零价铜对水溶液中有机污染物的氧化降解

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摘要

Oxidative degradation of organic pollutants and its mechanism were investigated in aqueous solution using zero valent copper (ZVC) under aerobic atmosphere condition. Diethyl phthalate (DEP) was completely oxidized after 120 min reaction by ZVC at initial pH 2.5 open to the air. DEP degradation followed the pseudo-first-order kinetics after the lag period, and the degradation rate of DEP increased gradually with the increase of ZVC dosage, and the decrease of initial pH from 5.8 to 2.0. ZVC required a shorter induction time and exhibited persistent oxidation capacity compared to that of zero valent iron and zero valent aluminium. The mechanism investigation showed that remarkable amount of Cu~+/Cu~(2+) and H_2O_2 were formed in ZVC acidic system, which was due to the corrosive dissolution of ZVC and the concurrent reduction of oxygen. The addition of tert-butanol completely inhibited the degradation of DEP and the addition of Fe~(2+) greatly enhanced the degradation rate, which demonstrated that hydroxyl radical was mainly responsible for the degradation of DEP in ZVC acidic system under aerobic atmosphere condition, and the formation of hydroxyl radical was attributed to the Fenton-like reaction of in situ formed Cu~+ with H_2O_2.
机译：在好氧气氛下，采用零价铜（ZVC）在水溶液中研究了有机污染物的氧化降解及其机理。 ZVC反应120分钟后，在初始pH 2.5下向空气中完全氧化邻苯二甲酸二乙酯（DEP）。滞后期后，DEP的降解遵循拟一级动力学，随着ZVC剂量的增加，DEP的降解速率逐渐增加，初始pH从5.8降低到2.0。与零价铁和零价铝相比，ZVC需要更短的诱导时间并表现出持久的氧化能力。机理研究表明，ZVC酸性体系中形成了大量的Cu〜+ / Cu〜（2+）和H_2O_2，这是由于ZVC的腐蚀溶解和氧气的同时还原所致。叔丁醇的加入完全抑制了DEP的降解，而Fe〜（2+）的加入大大提高了降解速率，这表明在好氧环境下ZVC酸性体系中羟基自由基是DEP降解的主要原因，羟基自由基的形成归因于原位形成的Cu〜+与H_2O_2的芬顿反应。

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  • 来源
    《Journal of Hazardous Materials》 |2014年第30期|193-199|共7页
  • 作者

    Gang Wen; Sheng-Jun Wang; Jun Ma; Ting-Lin Huang; Zheng-Qian Liu; Lei Zhao; Jin-Lan Xu;

  • 作者单位

    School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710050, People's Republic of China;

    State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China ,Beijing General Municipal Engineering Design and Research Institute, Beijing 100082, People's Republic of China;

    State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China;

    School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710050, People's Republic of China;

    School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China;

    Key Laboratory of Structures Dynamic Behavior and Control, Harbin Institute of Technology, Ministry of Education, Harbin 150090, People's Republic of China ,School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, People's Republic of China;

    School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710050, People's Republic of 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

    Zero valent copper; Oxidative degradation; Organic pollutants; Hydroxyl radical; Mechanism;

    机译：零价铜;氧化降解;有机污染物;羟自由基;机制;

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