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首页> 外文期刊>Journal of Hazardous Materials >Efficient removal of endosulfan from aqueous solution by UV-C/peroxides: A comparative study
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Efficient removal of endosulfan from aqueous solution by UV-C/peroxides: A comparative study

机译：UV-C /过氧化物有效去除水溶液中的硫丹：对比研究

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摘要

This study explored the efficiency of UV-C-based advanced oxidation processes (AOPs), i.e., UV/S_2O_8~(2-), UV/HSO_5~-, and UV/H_2O_2 for the degradation of endosulfan, an organochlorine insecticide and an emerging water pollutant. A significant removal, 91%, 86%, and 64%, of endosulfan, at an initial concentration of 2.45 μM and UV fluence of 480mJ/cm~2, was achieved by UV/S_2O_8~(2-), UV/HSO_5, and UV/H_2O_2 processes, respectively, at a [peroxide]_0/[endosulfan]_0 molar ratio of 20. The efficiency of these processes was, however, inhibited in the presence of radical scavengers, such as alcohols (e.g., tertiary butyl alcohol and isopropyl alcohol) and natural organic matter (NOM). The inhibition was also influenced by common inorganic anions in the order of nitrite ＞ bicarbonate ＞ chloride ＞ nitrate approx sulfate. The observed pseudo-first-order rate constant decreased while the degradation rate increased with increasing initial concentration of the target contaminant. The degradation mechanism of endosulfan by the AOPs was evaluated revealing the main by-product as endosulfan ether. Results of this study suggest that UV-C-based AOPs are potential methods for the removal of pesticides, such as endosulfan and its by-products, from contaminated water.
机译：本研究探索了基于UV-C的高级氧化过程（AOP）（即UV / S_2O_8〜（2-），UV / HSO_5〜-和UV / H_2O_2）对硫丹，有机氯杀虫剂和杀虫剂的降解效率。新兴水污染物。通过UV / S_2O_8〜（2-），UV / HSO_5，在初始浓度为2.45μM和UV通量为480mJ / cm〜2的条件下，硫丹的去除率达到91％，86％和64％。 [过氧化物] _0 / [硫丹] _0摩尔比分别为20和UV / H_2O_2工艺。但是，在自由基清除剂（例如醇（例如叔丁醇））存在下，这些方法的效率受到抑制。和异丙醇）和天然有机物（NOM）。抑制作用还受到常见无机阴离子的影响，依次为亚硝酸盐>碳酸氢盐>氯化物>硝酸盐约硫酸盐。随着目标污染物初始浓度的增加，观察到的拟一级反应速率常数降低，而降解速率增加。评估了AOPs降解硫丹的机理，揭示了主要副产物硫丹醚。这项研究的结果表明，基于UV-C的AOP是从受污染的水中去除农药（例如硫丹及其副产物）的潜在方法。

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  • 来源
    《Journal of Hazardous Materials》 |2013年第2期|584-592|共9页
  • 作者

    Noor S. Shah; Xuexiang He; Hasan M. Khan; Javed Ali Khan; Kevin E.OShea; Dominic L. Boccelli; Dionysios D. Dionysiou;

  • 作者单位

    Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan,Environmental Engineering and Science Program, University of Cincinnati, 705 Engineering Research Center, Cincinnati, OH 45221-0012, USA;

    Environmental Engineering and Science Program, University of Cincinnati, 705 Engineering Research Center, Cincinnati, OH 45221-0012, USA;

    Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan;

    Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan,Environmental Engineering and Science Program, University of Cincinnati, 705 Engineering Research Center, Cincinnati, OH 45221-0012, USA;

    Department of Chemistry and Biochemistry, Florida International University, Miami, FL 33199, USA;

    Environmental Engineering and Science Program, University of Cincinnati, 705 Engineering Research Center, Cincinnati, OH 45221-0012, USA;

    Environmental Engineering and Science Program, University of Cincinnati, 705 Engineering Research Center, Cincinnati, OH 45221-0012, USA,Nireas-International Water Research Centre, University of Cyprus, 20537 Nicosia, Cyprus;

  • 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

    Endosulfan; UV-C; Peroxides; Advanced oxidation processes (AOPs); Advanced Oxidation Technologies (AOTs); Water treatment;

    机译：硫丹;UV-C;过氧化物;先进的氧化工艺（AOP）;先进的氧化技术（AOT）;水处理;

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