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张翠, 胡学锋, 骆永明. 模拟太阳光下水中土霉素的光化学降解[J]. 环境化学, 2016, 35(3): 430-438. doi: 10.7524/j.issn.0254-6108.2016.03.2015101303
引用本文: 张翠, 胡学锋, 骆永明. 模拟太阳光下水中土霉素的光化学降解[J]. 环境化学, 2016, 35(3): 430-438. doi: 10.7524/j.issn.0254-6108.2016.03.2015101303
shu
ZHANG Cui, HU Xuefeng, LUO Yongming. Aqueous photodegradation of oxytetracycline under simulated sunlight irradiation[J]. Environmental Chemistry, 2016, 35(3): 430-438. doi: 10.7524/j.issn.0254-6108.2016.03.2015101303
Citation: ZHANG Cui, HU Xuefeng, LUO Yongming. Aqueous photodegradation of oxytetracycline under simulated sunlight irradiation[J]. Environmental Chemistry, 2016, 35(3): 430-438. doi: 10.7524/j.issn.0254-6108.2016.03.2015101303
shu

模拟太阳光下水中土霉素的光化学降解

  • 1.

    中国科学院烟台海岸带研究所, 海岸带环境过程与生态修复重点实验室, 烟台, 264003;

  • 2.

    中国科学院大学, 北京, 100049

  • 基金项目:

    国家自然科学基金(41076040,41230858)资助.

Aqueous photodegradation of oxytetracycline under simulated sunlight irradiation

  • 1.

    Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China;

  • 2.

    University of Chinese Academy of Sciences, Beijing, 100049, China

  • Fund Project: Supported by the National Natural Science Foundation of China (41076040, 41230858).

  • 摘要: 本文考察了水中重要的可溶性物质对土霉素(OTC)光解效率的影响,评估了直接光解和活性氧(HO·、1O2、O2·-)对土霉素光解的贡献,鉴定了OTC不同降解路径下的产物,探究了模拟太阳光照射下水中土霉素的光化学降解机理.结果表明,pH对土霉素的降解具有显著影响;不同反应条件下,土霉素的降解均符合准一级动力学;降解过程中,78%的土霉素降解与溶解氧无关,Fe3+、HCO3-和腐殖酸的存在有利于土霉素的光降解,而NO3-则对降解无显著影响.除此之外,基于自由基捕获实验及高效液相电喷雾质谱联用仪(HPLC-ESI-MS)检测,推导出了土霉素7种主要光降解产物的分子结构及4条可能的降解途径.
    Abstract: Photodegradation of oxytetracycline (OTC) under simulated sunlight irradiation was investigated with attention given to (1) the effects of major solutes in water on OTC photolysis; (2) the contribution of direct photolysis and reactive oxygen species (HO·, 1O2, O2·-) to OTC degradation; and 3) the products of OTC photolysis under different photolysis pathways in water. The results showed that OTC photolysis was highly pH-dependent and followed pseudo first-order model kinetics, with about 78% of OTC phototransformation being independent of dissolved oxygen. In addition, enhanced OTC was observed in the presence of Fe3+, HCO3- and HA, whereas the presence of NO3- showed no effect on OTC photo-degradation. Additionally, four possible photolysis pathways and seven corresponding products were proposed, based on the analysis of radical quenching results and photoproducts detected by high-performance liquid chromatography electrospray ionization mass spectrometry (HPLC-ESI-MS).
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出版历程
  • 收稿日期:  2015-10-13
  • 刊出日期:  2016-03-15
张翠, 胡学锋, 骆永明. 模拟太阳光下水中土霉素的光化学降解[J]. 环境化学, 2016, 35(3): 430-438. doi: 10.7524/j.issn.0254-6108.2016.03.2015101303
引用本文: 张翠, 胡学锋, 骆永明. 模拟太阳光下水中土霉素的光化学降解[J]. 环境化学, 2016, 35(3): 430-438. doi: 10.7524/j.issn.0254-6108.2016.03.2015101303
shu
ZHANG Cui, HU Xuefeng, LUO Yongming. Aqueous photodegradation of oxytetracycline under simulated sunlight irradiation[J]. Environmental Chemistry, 2016, 35(3): 430-438. doi: 10.7524/j.issn.0254-6108.2016.03.2015101303
Citation: ZHANG Cui, HU Xuefeng, LUO Yongming. Aqueous photodegradation of oxytetracycline under simulated sunlight irradiation[J]. Environmental Chemistry, 2016, 35(3): 430-438. doi: 10.7524/j.issn.0254-6108.2016.03.2015101303
shu

模拟太阳光下水中土霉素的光化学降解

  • 1.  中国科学院烟台海岸带研究所, 海岸带环境过程与生态修复重点实验室, 烟台, 264003;
  • 2.  中国科学院大学, 北京, 100049
  • 收稿日期:  2015-10-13
基金项目:

国家自然科学基金(41076040,41230858)资助.

摘要: 本文考察了水中重要的可溶性物质对土霉素(OTC)光解效率的影响,评估了直接光解和活性氧(HO·、1O2、O2·-)对土霉素光解的贡献,鉴定了OTC不同降解路径下的产物,探究了模拟太阳光照射下水中土霉素的光化学降解机理.结果表明,pH对土霉素的降解具有显著影响;不同反应条件下,土霉素的降解均符合准一级动力学;降解过程中,78%的土霉素降解与溶解氧无关,Fe3+、HCO3-和腐殖酸的存在有利于土霉素的光降解,而NO3-则对降解无显著影响.除此之外,基于自由基捕获实验及高效液相电喷雾质谱联用仪(HPLC-ESI-MS)检测,推导出了土霉素7种主要光降解产物的分子结构及4条可能的降解途径.

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