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无机离子对左旋葡聚糖光降解的影响

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黄通, 杨池, 张春燕, 章炎麟. 无机离子对左旋葡聚糖光降解的影响[J]. 环境化学, 2021, (2): 624-631. doi: 10.7524/j.issn.0254-6108.2019092602
引用本文: 黄通, 杨池, 张春燕, 章炎麟. 无机离子对左旋葡聚糖光降解的影响[J]. 环境化学, 2021, (2): 624-631. doi: 10.7524/j.issn.0254-6108.2019092602
shu
HUANG Tong, YANG Chi, ZHANG Chunyan, ZHANG Yanlin. Effect of inorganic ions on photodegradation of Levoglucosan[J]. Environmental Chemistry, 2021, (2): 624-631. doi: 10.7524/j.issn.0254-6108.2019092602
Citation: HUANG Tong, YANG Chi, ZHANG Chunyan, ZHANG Yanlin. Effect of inorganic ions on photodegradation of Levoglucosan[J]. Environmental Chemistry, 2021, (2): 624-631. doi: 10.7524/j.issn.0254-6108.2019092602
shu

无机离子对左旋葡聚糖光降解的影响

  • 1. 南京信息工程大学应用气象学院, 气候与环境变化国际合作联合实验室大气环境中心, 南京, 210044;

  • 2. 南京信息工程大学气象灾害预报预警与评估协同创新中心, 气象灾害教育部重点实验室, 南京, 210044

    • 通讯作者: 章炎麟, E-mail: dryanlinzhang@outlook
  • 基金项目:

    国家自然科学基金（91644103）和江苏省自然科学杰出青年基金项目（BK20180040）资助.

Effect of inorganic ions on photodegradation of Levoglucosan

  • 1. Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change(ILCEC), School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing, 210044, China;

  • 2. Key Laboratory of Meteorological Disaster, Ministry of Education(KLME), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing, 210044, China

    • Corresponding author: ZHANG Yanlin, dryanlinzhang@outlook
  • Fund Project: Supported by the National Natural Science Foundation of China (91644103) and the Jiangsu Provincial Natural Science Outstanding Youth Fund Project (BK20180040).

  • 摘要: 左旋葡聚糖（LG）被广泛作为生物质燃烧的示踪剂.然而，近年来研究表明左旋葡聚糖在大气中不稳定而会发生光降解.此外，对于大气中含量较高的SO42-、NO3-、NO2-无机离子对LG光解的影响罕有报到.为此，本文模拟了液相中SO42-、NO3-、NO2-对LG光氧化行为的影响.结果表明，Na2SO4、NaNO3、NaNO2条件下LG光解速率常数分别为0.208、0.182、0.165 min-1，均低于对照组（0.266 min-1），这表明无机离子的存在会减缓LG光降解速率.此外，这3种无机离子对LG光解产物中的低分子脂肪酸分布，甲酸/乙酸（C1/C2）比率均有重要的影响.其中，SO42-存在下产物中戊二酸较多、NO3-存在下产物中甲酸较多、NO2-存在下产物中乙酸较多；NO2-存在下产物中的C1/C2比率小于1与一般二次源中的C1/C2比率不一致，这表明由单一反应引起的C1/C2并不总是大于1.这些结果对于我们深刻理解大气液相中的有机物转化具有重要的参考价值.
    Abstract: Levoglucosan (LG) is widely used as a tracer for biomass combustion. However, recent studies have shown that LG is unstable in the atmosphere and undergoes photodegradation. In addition, the effects of relatively high levels of SO42-, NO3-, and NO2- on LG photolysis have not been reported. To this end, the effects of SO42-, NO3-, and NO2- in the liquid phase on the photooxidative degradation of LG were simulated. The results showed that the photodegradation rate constants of LG under the conditions of Na2SO4, NaNO3, and NaNO2 were 0.208, 0.182, and 0.165 min-1, which were all lower than those of the control group (0.266 min-1). This indicated that the presence of inorganic ions would slow the LG photodegradation rate. In addition, these three inorganic ions had important effects on the distribution of low-molecular-weight fatty acids and the formic acid/acetic acid (C1/C2) ratio in LG photolysis products. Among them, there was more glutaric acid in the product in the presence of SO42-, more formic acid in the product in the presence of NO3-, more acetic acid in the product in the presence of NO2-; The C1/C2 ratios in the secondary sources were not consistent, which indicated that the C1/C2 caused by a single reaction was not always>1. These results had important reference value for our deep understanding of the conversion of organics in the atmospheric liquid phase.
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  • 收稿日期:  2019-09-26

无机离子对左旋葡聚糖光降解的影响

    通讯作者: 章炎麟, E-mail: dryanlinzhang@outlook
  • 1. 南京信息工程大学应用气象学院, 气候与环境变化国际合作联合实验室大气环境中心, 南京, 210044;
  • 2. 南京信息工程大学气象灾害预报预警与评估协同创新中心, 气象灾害教育部重点实验室, 南京, 210044
  • 收稿日期:  2019-09-26
基金项目:

国家自然科学基金（91644103）和江苏省自然科学杰出青年基金项目（BK20180040）资助.

摘要: 左旋葡聚糖（LG）被广泛作为生物质燃烧的示踪剂.然而，近年来研究表明左旋葡聚糖在大气中不稳定而会发生光降解.此外，对于大气中含量较高的SO42-、NO3-、NO2-无机离子对LG光解的影响罕有报到.为此，本文模拟了液相中SO42-、NO3-、NO2-对LG光氧化行为的影响.结果表明，Na2SO4、NaNO3、NaNO2条件下LG光解速率常数分别为0.208、0.182、0.165 min-1，均低于对照组（0.266 min-1），这表明无机离子的存在会减缓LG光降解速率.此外，这3种无机离子对LG光解产物中的低分子脂肪酸分布，甲酸/乙酸（C1/C2）比率均有重要的影响.其中，SO42-存在下产物中戊二酸较多、NO3-存在下产物中甲酸较多、NO2-存在下产物中乙酸较多；NO2-存在下产物中的C1/C2比率小于1与一般二次源中的C1/C2比率不一致，这表明由单一反应引起的C1/C2并不总是大于1.这些结果对于我们深刻理解大气液相中的有机物转化具有重要的参考价值.

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