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胡平, 郑星, 刘玉坤, 郭建波, 李素娟, 郑经堂. 接触辉光放电等离子体处理有机砷废水[J]. 环境工程学报, 2016, 10(10): 5648-5652. doi: 10.12030/j.cjee.201504130
引用本文: 胡平, 郑星, 刘玉坤, 郭建波, 李素娟, 郑经堂. 接触辉光放电等离子体处理有机砷废水[J]. 环境工程学报, 2016, 10(10): 5648-5652. doi: 10.12030/j.cjee.201504130
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HU Ping, ZHENG Xing, LIU Yukun, GUO Jianbo, LI Sujuan, ZHENG Jingtang. Treatment of organoarsenic wastewater using contact glow discharge plasma[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5648-5652. doi: 10.12030/j.cjee.201504130
Citation: HU Ping, ZHENG Xing, LIU Yukun, GUO Jianbo, LI Sujuan, ZHENG Jingtang. Treatment of organoarsenic wastewater using contact glow discharge plasma[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5648-5652. doi: 10.12030/j.cjee.201504130
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接触辉光放电等离子体处理有机砷废水

  • 1.

    中国石油大学(华东)重质油国家重点实验室, 青岛 266580

  • 2.

    北京中能环科技术发展有限公司, 北京 100080

  • 基金项目:

    中国石油大学（华东）研究生自主创新基金资助项目（14CX06117A）

  • 中图分类号: X523

Treatment of organoarsenic wastewater using contact glow discharge plasma

  • 1.

    State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China

  • 2.

    Beijing Sinen En-Tech Co. Ltd., Beijing 100080, China

  • Fund Project:

  • 摘要: 洛克沙砷（ROX）饲料添加剂在农业的普遍使用，导致大量的ROX进入自然水体，引起环境污染。为了修复含ROX废水，首次提出采用接触辉光放电等离子体（CGDP）氧化ROX，并考察了多种因素对ROX降解效果的影响。结果表明，ROX能被CGDP完全氧化降解，且As（V）是其最终降解产物；输入能量的增加利于ROX的氧化，而pH值对ROX的降解影响较小；在辉光放电最佳条件（输入能量58 W，pH 4.0）下，加入100 μmol·L-1 ROX，42 min内降解率为97%，As（V）的生成量可达95 μmol·L-1。此外，加入一定量的Fe（II），因其可以通过利用CGDP原位产生的H2O2通过芬顿反应产生大量额外的·OH，而能显著地催化ROX转化为无机砷。通过自由基捕获实验，证明了·OH在ROX降解中起主要作用并探索了其氧化降解机理。
    Abstract: Organoarsenic compounds, such as roxarsone (ROX), are extensively used as feed additives in the agricultural industry, and have become a serious environmental concern. This study investigated unprecedentedly the applicability of the contact glow discharge process (CGDP) for ROX oxidation and degradation in aqueous solution, and evaluated the effects of various reaction conditions on ROX conversion. The results indicated that ROX could be completely degraded, with As(V) as the final product. The higher energy input was beneficial for a higher As(V) production efficiency, whereas the solution pH did not seem to influence the ROX oxidation efficiency. Consequently, approximately 97% of ROX degraded, and more than 95 μmol·L-1 As(V) were generated within 42 min under the optimum glow discharge condition (58 W of input energy, pH 4.0). Furthermore, addition of Fe(II) into the CGDP system significantly enhanced the ROX oxidation, due to the consumption of in-situ electrogenerated H2O2 in CGDP and the generation of additional ·OH. Furthermore, the experiments of quenching active radicals indicated that ·OH plays an important role in the mineralization of ROX to arsenate, and also confirmed the ROX degradation mechanism in the CGDP system.
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    [4] 严群, 桂勇刚, 周娜娜, 等. 混凝沉淀法处理含砷选矿废水. 环境工程学报, 2014, 8(9): 3683-3688 YAN Qun, GUI Yonggang, ZHOU Na'na, et al. Treatment of arsenic-containing mineral processing wastewater by coagulation and sedimentation process. Chinese Journal of Environmental Engineering, 2014, 8(9): 3683-3688(in Chinese)
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出版历程
  • 收稿日期:  2015-05-11
  • 刊出日期:  2016-10-20

接触辉光放电等离子体处理有机砷废水

  • 1. 中国石油大学(华东)重质油国家重点实验室, 青岛 266580
  • 2. 北京中能环科技术发展有限公司, 北京 100080
  • 收稿日期:  2015-05-11
基金项目:

中国石油大学（华东）研究生自主创新基金资助项目（14CX06117A）

摘要: 洛克沙砷（ROX）饲料添加剂在农业的普遍使用，导致大量的ROX进入自然水体，引起环境污染。为了修复含ROX废水，首次提出采用接触辉光放电等离子体（CGDP）氧化ROX，并考察了多种因素对ROX降解效果的影响。结果表明，ROX能被CGDP完全氧化降解，且As（V）是其最终降解产物；输入能量的增加利于ROX的氧化，而pH值对ROX的降解影响较小；在辉光放电最佳条件（输入能量58 W，pH 4.0）下，加入100 μmol·L-1 ROX，42 min内降解率为97%，As（V）的生成量可达95 μmol·L-1。此外，加入一定量的Fe（II），因其可以通过利用CGDP原位产生的H2O2通过芬顿反应产生大量额外的·OH，而能显著地催化ROX转化为无机砷。通过自由基捕获实验，证明了·OH在ROX降解中起主要作用并探索了其氧化降解机理。

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