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亚铁离子/四聚磷酸活化分子氧降解氯霉素

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余洁, 原弘. 亚铁离子/四聚磷酸活化分子氧降解氯霉素[J]. 环境化学, 2017, 36(11): 2304-2310. doi: 10.7524/j.issn.0254-6108.2017031005
引用本文: 余洁, 原弘. 亚铁离子/四聚磷酸活化分子氧降解氯霉素[J]. 环境化学, 2017, 36(11): 2304-2310. doi: 10.7524/j.issn.0254-6108.2017031005
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YU Jie, YUAN Hong. Dioxygen activation by Fe(Ⅱ)-Tetrapolyphosphate(TPP) complex for the degradation of chloramphenicol[J]. Environmental Chemistry, 2017, 36(11): 2304-2310. doi: 10.7524/j.issn.0254-6108.2017031005
Citation: YU Jie, YUAN Hong. Dioxygen activation by Fe(Ⅱ)-Tetrapolyphosphate(TPP) complex for the degradation of chloramphenicol[J]. Environmental Chemistry, 2017, 36(11): 2304-2310. doi: 10.7524/j.issn.0254-6108.2017031005
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亚铁离子/四聚磷酸活化分子氧降解氯霉素

  • 1.

    农药与化学生物学教育部重点实验室, 华中师范大学化学学院, 武汉, 430079

  • 基金项目:

    国家自然科学基金（21277055）和中央高校基本科研业务费专项资金（CCNU16A02003）资助.

Dioxygen activation by Fe(Ⅱ)-Tetrapolyphosphate(TPP) complex for the degradation of chloramphenicol

  • 1.

    Key Lab of Pesticide & Chemistry Biology Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China

  • Fund Project: Supported by the National Natural Science Foundation of China (21277055) and the Fundamental Research Funds for the Central Universities (CCNU16A02003).

  • 摘要: 本文研究了亚铁离子（Fe2+）/四聚磷酸（TPP）/空气（Air）体系降解有机污染物氯霉素（CAP）的能力.研究发现，在氩气（Ar）氛围中和用乙二胺四乙酸（EDTA）代替TPP配体后均不能有效降解CAP，只有在Fe2+、TPP、Air共存时才能够有效降解CAP.结合活性氧测试及自由基捕获实验，表明Fe2+/TPP配合物活化分子氧是该体系降解有机污染物的关键，反应过程中生成超氧阴离子自由基（·O2-）和羟基自由基（·OH），其中·OH在CAP降解过程中起主要作用.随着反应的进行，体系中的Fe2+逐渐转化为Fe3+，失去活化分子氧的能力，也不再能够降解CAP.上述降解过程中脱氯量为10%，总有机碳去除率为20%，综合气质联用仪（GC-MS）以及液质联用仪（LC-MS）测得的中间体物种，推测了CAP降解的可能机理.进一步研究表明，在中性及弱碱性条件下该体系对CAP具有较强的降解能力，为其用于CAP污染物的处理提供了可能.
    Abstract: The ability of Fe2+/TPP/Air system to degrade chloramphenicol (CAP) was evaluated in this study. For comparison, controlled experiments were conducted by replacing the air and TPP with Ar and EDTA respectively. It was found that the CAP could only be effectively degraded in the presence of Fe2+, TPP and Air. The activation of molecular oxygen by the complexes of TPP and Fe2+ played a dominant role in the degradation of organic pollutants. Two free radicals, ·O2- and ·OH, were generated in this system, whilst the ·OH radical played a dominant role in pollutant degradation. CAP was degraded until Fe2+ in the system was completely oxidized to Fe3+. TOC experimental results showed that the mineralization rate of CAP in this system was 20%. The dechlorination rate was 10%. Based on the intermediate species measured by the GC-MS and LC-MS, the possible degradation mechanism of CAP was proposed. The Fe2+/TPP/Air system worked well for the degradation of CAP under the neutral and weakly alkaline conditions, and would be an alternative technology for CAP removal.
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  • 收稿日期:  2017-03-10
  • 刊出日期:  2017-11-15

亚铁离子/四聚磷酸活化分子氧降解氯霉素

  • 1. 农药与化学生物学教育部重点实验室, 华中师范大学化学学院, 武汉, 430079
  • 收稿日期:  2017-03-10
基金项目:

国家自然科学基金（21277055）和中央高校基本科研业务费专项资金（CCNU16A02003）资助.

摘要: 本文研究了亚铁离子（Fe2+）/四聚磷酸（TPP）/空气（Air）体系降解有机污染物氯霉素（CAP）的能力.研究发现，在氩气（Ar）氛围中和用乙二胺四乙酸（EDTA）代替TPP配体后均不能有效降解CAP，只有在Fe2+、TPP、Air共存时才能够有效降解CAP.结合活性氧测试及自由基捕获实验，表明Fe2+/TPP配合物活化分子氧是该体系降解有机污染物的关键，反应过程中生成超氧阴离子自由基（·O2-）和羟基自由基（·OH），其中·OH在CAP降解过程中起主要作用.随着反应的进行，体系中的Fe2+逐渐转化为Fe3+，失去活化分子氧的能力，也不再能够降解CAP.上述降解过程中脱氯量为10%，总有机碳去除率为20%，综合气质联用仪（GC-MS）以及液质联用仪（LC-MS）测得的中间体物种，推测了CAP降解的可能机理.进一步研究表明，在中性及弱碱性条件下该体系对CAP具有较强的降解能力，为其用于CAP污染物的处理提供了可能.

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