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Efficient Degradation of Nitrobenzene Induced by Glow Discharge Plasma in Aqueous Solution

机译:辉光放电等离子体在水溶液中诱导的硝基苯高效降解

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摘要

The oxidative degradation of nitrobenzene (NB) induced by gaseous glow discharge plasma in contact with aqueous solution was investigated. The experimental results indicated that NB removal obeyed first-order kinetics under certain applied currents. The major degradation byproducts such as nitrophenols, phenol, 1,3-dinitrobenzene and carboxylic acids have been detected. The distribution of nitrophenols follows the order o- > p- > m- and oxalic, formic and acetic acids are major carboxylic intermediates. The eventual products were nitrate ion and carbon dioxide. During the treatment, a large amount of hydrogen peroxide was produced. Addition of ferrous or ferric ions into the solution greatly enhanced the degradation rate due to Fenton’s reaction. The energy efficiencies of NB removal and hydrogen peroxide formation were compared with those of other discharges. Hydroxyl radicals were shown to be the most likely species responsible for NB degradation
机译:研究了气体辉光放电等离子体与水溶液接触引起的硝基苯(NB)的氧化降解。实验结果表明,在一定的外加电流作用下,脱除NB服从一级动力学。已发现主要的降解副产物,例如硝基苯酚,苯酚,1,3-二硝基苯和羧酸。硝基苯酚的分布遵循o-> p-> m-的顺序,草酸,甲酸和乙酸是主要的羧酸中间体。最终产物是硝酸根离子和二氧化碳。在处理过程中,产生了大量的过氧化氢。由于Fenton反应,在溶液中添加亚铁或铁离子大大提高了降解速度。将NB去除和过氧化氢形成的能效与其他放电的能效进行了比较。羟基自由基被证明是最可能导致NB降解的物种

著录项

  • 来源
    《Plasma Chemistry and Plasma Processing》 |2007年第4期|504-515|共12页
  • 作者单位

    Department of Chemistry Zhejiang University Hangzhou 310027 P. R. China;

    Department of Chemistry Zhejiang University Hangzhou 310027 P. R. China;

    Department of Chemistry Zhejiang University Hangzhou 310027 P. R. 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Electrical discharge; Nitrobenzene degradation; Pathway;

    机译:放电;硝基苯降解;途径;
  • 入库时间 2022-08-18 02:20:07

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