...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Thermal Activation of Peracetic Acid in Aquatic Solution: The Mechanism and Application to Degrade Sulfamethoxazole
【24h】

Thermal Activation of Peracetic Acid in Aquatic Solution: The Mechanism and Application to Degrade Sulfamethoxazole

机译：水生溶液中过乙酸的热激活：降解磺胺甲恶唑的机制和应用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Chemical oxidation using peracetic acid (PAA) can be enhanced by activation with the formation of reactive species such as organic radicals (R-O~•) and HO~•. Thermal activation is an alternative way for PAA activation, which was first applied to degrade micropollutants in this study. PAA is easily decomposed by heat via both radical and nonradical pathways. Our experimental results suggest that a series of reactive species including R-O~• HO~•, and 1~O_2 can be produced through the thermal decomposition of PAA. Sulfamethoxazole (SMX), a typical sulfa drug, can be effectively removed by the thermoactivated PAA process under conditions of neutral pH. R-O~• including CH_3C(O)O~• and CH_3C(O)OO~• has been shown to play a primary role in the degradation of SMX followed by direct PAA oxidation in the thermoactivated PAA process. Both higher temperature (60 °C) and higher PAA dose benefit SMX degradation, while coexisting H_2O_2 inhibits SMX degradation in the thermoactivated PAA process. With a variation of solution pH, conditions near a neutral value show the best performance of this process in SMX degradation. Based on the identified intermediates, transformation of SMX was proposed to undergo oxidation of the amine group and oxidative coupling reactions. This study definitively illustrates the PAA decomposition pathways at high temperature in aquatic solution and addresses the possibility of the thermoactivated PAA process for contaminant destruction, demonstrating this process to be a feasible advanced oxidation process.
机译：使用过乙酸（PAA）的化学氧化可以通过在形成活性物质（如有机基团（R-O〜•）和HO〜•〜•〜•〜•〜•〜•热激活是PAA活化的替代方法，首先应用于降解本研究中的微孔。 PAA通过激进和非途径轻松地通过热分解。我们的实验结果表明，通过PAA的热分解，可以生产一系列包括R-O〜•HO〜•HO〜•HO〜•和1〜O_2的反应性物种。通过在中性pH的条件下，可以通过热敏的PAA工艺有效地除去磺胺甲恶唑（SMX）。 R-O〜•包括CH_3C（O）O〜•和CH_3C（O）OO〜•已显示在SMX的降解中发挥主要作用，然后在热激活的PAA过程中进行直接PAA氧化。较高温度（60℃）和更高的PAA剂量益处SMX降解，同时共存H_2O_2抑制热敏PAA过程中的SMX降解。随着溶液pH的变化，在中性值附近的条件显示在SMX降解中该过程的最佳性能。基于所鉴定的中间体，提出了SMX的转化以进行胺基氧化和氧化偶联反应。该研究明确地说明了水生溶液中高温下的PAA分解途径，并解决了用于污染物破坏的热敏PAA过程的可能性，证明该过程是可行的先进氧化过程。

著录项

  • 来源
    《Environmental Science & Technology》 |2020年第22期|14635-14645|共11页
  • 作者

    Jingwen Wang; Ying Wan; Jiaqi Ding; Zongping Wang; Jun Ma; Pengchao Xie; Mark R. Wiesner;

  • 作者单位

    School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 China;

    School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Center for the Environmental Implications of Nanotechnology (CEINT) Durham North Carolina 27708-0287 United States;

    Center for the Environmental Implications of Nanotechnology (CEINT) Durham North Carolina 27708-0287 United States;

  • 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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号