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UV-254 nm活化过硫酸盐降解麻黄碱的影响因素和机理

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张恒, 吴琳琳, 陈力可, 侯嵩, 高建峰, 郭昌胜, 徐建. UV-254 nm活化过硫酸盐降解麻黄碱的影响因素和机理[J]. 环境化学, 2020, (6): 1607-1616. doi: 10.7524/j.issn.0254-6108.2019120501
引用本文: 张恒, 吴琳琳, 陈力可, 侯嵩, 高建峰, 郭昌胜, 徐建. UV-254 nm活化过硫酸盐降解麻黄碱的影响因素和机理[J]. 环境化学, 2020, (6): 1607-1616. doi: 10.7524/j.issn.0254-6108.2019120501
shu
ZHANG Heng, WU Linlin, CHEN Like, HOU Song, GAO Jianfeng, GUO Changsheng, XU Jian. Influencing factors and mechanisms of ephedrine degradation by UV-254 nm activated persulfate[J]. Environmental Chemistry, 2020, (6): 1607-1616. doi: 10.7524/j.issn.0254-6108.2019120501
Citation: ZHANG Heng, WU Linlin, CHEN Like, HOU Song, GAO Jianfeng, GUO Changsheng, XU Jian. Influencing factors and mechanisms of ephedrine degradation by UV-254 nm activated persulfate[J]. Environmental Chemistry, 2020, (6): 1607-1616. doi: 10.7524/j.issn.0254-6108.2019120501
shu

UV-254 nm活化过硫酸盐降解麻黄碱的影响因素和机理

  • 1. 中北大学理学院, 太原, 030051;

  • 2. 中国环境科学研究院环境健康风险评估与研究中心, 北京, 100012;

  • 3. 国家环境保护化学品生态效应与风险评估重点实验室, 北京, 100012

    • 通讯作者: 郭昌胜, E-mail: guocs@craes.org.cn ; 
  • 基金项目:

    国家水体污染控制与治理科技重大专项（2017ZX07301005-003，2017ZX07302001）和国家自然科学基金（41673120）资助.

Influencing factors and mechanisms of ephedrine degradation by UV-254 nm activated persulfate

  • 1. College of Science, North University of China, Taiyuan, 030051, China;

  • 2. Center for Environmental Health Risk Assessment and Research, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China;

  • 3. State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China

    • Corresponding author: GUO Changsheng, guocs@craes.org.cn ; 
  • Fund Project: Supported by the National Water Pollution Control and Management Science and Technology Major Project (2017ZX07301005-003, 2017ZX07302001) and the National Natural Science Foundation of China (41673120).

  • 摘要: 采用UV-254 nm活化过硫酸盐高级氧化技术去除水中污染物麻黄碱（EPH），并研究了其降解动力学过程和降解机理.考察了过硫酸盐（PS）投加量、EPH的初始浓度、不同pH值及不同离子（HCO3-、NO3-、Cl-）对降解效果的影响.结果表明，UV-254 nm活化过硫酸盐工艺能有效去除实验条件下的EPH，其氧化降解反应符合二级动力学方程.EPH去除率随着PS投加量的增加而增大.pH对降解反应有较大的影响，在pH=7的条件下，反应速率最快，表观反应动力学常数（kobs）为0.467 min-1.进一步研究表明，HCO3-、NO3-和Cl-对EPH的降解都存在抑制作用，在相同浓度下，其抑制程度依次为Cl- > NO3- > HCO3-.通过UPLC-MS/MS鉴定了麻黄碱降解的中间体，并提出了可能的降解机理和转化途径.
    Abstract: In this study the degradation of ephedrine (EPH) by UV-254 nm activated persulfate was carried out in water, and the degradation kinetics and mechanism were investigated. The effect of persulfate dosage, initial concentration of EPH, different pH values and different ions (HCO3-, NO3-, Cl-) on the degradation was evaluated as well. Results showed that UV-254 nm activated persulfate could effectively remove EPH from water, and the oxidative degradation reaction followed the second-order kinetic equation. The EPH removal efficiency increased with the increasing PS dosage. EPH degradation was pH dependent, with the highest reaction rate achieved at pH=7 and the apparent kinetic constant (kobs) of 0.467 min-1. HCO3-, NO3- and Cl- inhibited EPH degradation and the inhibition followed the order of Cl- > NO3- > HCO3-. The degradation intermediates of EPH were identified by UPLC-MS/MS, and the possible degradation mechanisms and transformation pathways were proposed.
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  • 收稿日期:  2019-12-05
张恒, 吴琳琳, 陈力可, 侯嵩, 高建峰, 郭昌胜, 徐建. UV-254 nm活化过硫酸盐降解麻黄碱的影响因素和机理[J]. 环境化学, 2020, (6): 1607-1616. doi: 10.7524/j.issn.0254-6108.2019120501
引用本文: 张恒, 吴琳琳, 陈力可, 侯嵩, 高建峰, 郭昌胜, 徐建. UV-254 nm活化过硫酸盐降解麻黄碱的影响因素和机理[J]. 环境化学, 2020, (6): 1607-1616. doi: 10.7524/j.issn.0254-6108.2019120501
shu
ZHANG Heng, WU Linlin, CHEN Like, HOU Song, GAO Jianfeng, GUO Changsheng, XU Jian. Influencing factors and mechanisms of ephedrine degradation by UV-254 nm activated persulfate[J]. Environmental Chemistry, 2020, (6): 1607-1616. doi: 10.7524/j.issn.0254-6108.2019120501
Citation: ZHANG Heng, WU Linlin, CHEN Like, HOU Song, GAO Jianfeng, GUO Changsheng, XU Jian. Influencing factors and mechanisms of ephedrine degradation by UV-254 nm activated persulfate[J]. Environmental Chemistry, 2020, (6): 1607-1616. doi: 10.7524/j.issn.0254-6108.2019120501
shu

UV-254 nm活化过硫酸盐降解麻黄碱的影响因素和机理

    通讯作者: 郭昌胜, E-mail: guocs@craes.org.cn ; 
  • 1. 中北大学理学院, 太原, 030051;
  • 2. 中国环境科学研究院环境健康风险评估与研究中心, 北京, 100012;
  • 3. 国家环境保护化学品生态效应与风险评估重点实验室, 北京, 100012
  • 收稿日期:  2019-12-05
基金项目:

国家水体污染控制与治理科技重大专项（2017ZX07301005-003，2017ZX07302001）和国家自然科学基金（41673120）资助.

摘要: 采用UV-254 nm活化过硫酸盐高级氧化技术去除水中污染物麻黄碱（EPH），并研究了其降解动力学过程和降解机理.考察了过硫酸盐（PS）投加量、EPH的初始浓度、不同pH值及不同离子（HCO3-、NO3-、Cl-）对降解效果的影响.结果表明，UV-254 nm活化过硫酸盐工艺能有效去除实验条件下的EPH，其氧化降解反应符合二级动力学方程.EPH去除率随着PS投加量的增加而增大.pH对降解反应有较大的影响，在pH=7的条件下，反应速率最快，表观反应动力学常数（kobs）为0.467 min-1.进一步研究表明，HCO3-、NO3-和Cl-对EPH的降解都存在抑制作用，在相同浓度下，其抑制程度依次为Cl- > NO3- > HCO3-.通过UPLC-MS/MS鉴定了麻黄碱降解的中间体，并提出了可能的降解机理和转化途径.

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