• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Aquatic photodegradation of clofibric acid under simulated sunlight irradiation: kinetics and mechanism analysis
【24h】

Aquatic photodegradation of clofibric acid under simulated sunlight irradiation: kinetics and mechanism analysis

机译：模拟阳光照射下植物纤维酸的水生光光降解：动力学与机制分析

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

Clofibric acid is one of the most frequently detected pharmaceuticals in various aquatic environments. Photodegradation of clofibric acid in water under simulated sunlight was investigated. The effects of different initial concentrations, pH conditions and dissolved oxygen were examined. Photodegradation of clofibric acid followed a pseudo-first-order kinetics model, and the rate decreased gradually with the increasing initial concentration of clofibric acid. Dissolved oxygen inhibited the photodegradation of clofibric acid. As a result of varying reaction species of clofibric acid, the initial pH conditions greatly influenced its photodegradation. Quenching experiments showed that the self-sensitization process via center dot OH and O-1(2) occured during photodegradation of clofibric acid, and the bimolecular reaction rate constants of clofibric acid with center dot OH and O-1(2) were determined via the competition kinetics method to be 3.93(+/- 0.20) x 10(8) and 2.38(+/- 0.12) x 10(6) L mol(-1) s(-1), respectively. In addition, the transformation products of clofibric acid were identified by the UPLC-Q-TOF-MS microsystem, and eight products were detected. It is proposed that the photodegradation of clofibric acid occurred mainly via decarboxylation, dechlorination, center dot OH addition and O-1(2) attack reaction.
机译：Clofibric acid是各种水生环境中最常检测到的药物之一。研究了模拟阳光下水中氯纤维纤维的光降解。检查了不同初始浓度，pH条件和溶解氧的影响。氯纤维酸的光降解跟随伪一阶动力学模型，随着氯纤维纤维酸的初始浓度的增加而逐渐降低。溶解氧抑制了Clofibric酸的光降解。由于甲纤维纤维酸的反应物种不同，初始pH条件极大地影响了其光降解。淬火实验表明，通过中心点OH和O-1（2）在甲苯甲酸的光降解期间发生自我敏化过程，并通过中心点OH和O-1（2）的Cloficric酸的分散反应速率常数在竞争动力学方法分别为3.93（+/- 0.20）×10（8）和2.38（+/- 0.12）×10（6）L mol（-1）S（-1）。此外，通过UPLC-Q-TOF-MS MicroSystem鉴定Clofibric酸的转化产物，检测八种产品。提出，氯纤维酸的光降解主要通过脱羧，脱氯，中心点OH加入和O-1（2）发作反应。

著录项

  • 来源
    《RSC Advances》 |2018年第49期|共9页
  • 作者

    Zhang Xiangdan; Liu Zongchao; Kong Qingqing; Liu Guoguang; Lv Wenying; Li Fuhua; Lin Xiaoxuan;

  • 作者单位

    Guangdong Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr 100 Waihuan Xi Rd Guangzhou 510006 Guangdong Peoples R China;

    Guangdong Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr 100 Waihuan Xi Rd Guangzhou 510006 Guangdong Peoples R China;

    Sun Yat Sen Univ Sch Environm Sci &

    Engn Guangzhou 510275 Guangdong Peoples R China;

    Guangdong Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr 100 Waihuan Xi Rd Guangzhou 510006 Guangdong Peoples R China;

    Guangdong Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr 100 Waihuan Xi Rd Guangzhou 510006 Guangdong Peoples R China;

    Guangdong Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr 100 Waihuan Xi Rd Guangzhou 510006 Guangdong Peoples R China;

    Guangdong Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr 100 Waihuan Xi Rd Guangzhou 510006 Guangdong Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 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