疏水性中性溶解有机物:第一次了解由降雨和降解引起的成分变化和消毒副产品的形成
Hang Vo-Minh Nguyen1, Hye-Bin Lim2, Jin Hur3
1Department of Environment Energy Engineering, Seoul National University of Science & Technology, Seoul, 01811, South Korea.
Journal of environmental sciences (China)
|December 29, 2025
概括
降雨改变了溶解有机物 (DOM) 的结构,增加了疏水中性 (HoN) 分数. HoN是形成消毒副产品的关键,如三甲,对水资源管理至关重要.
科学领域:
- 环境化学环境化学
- 分析水质 分析水质
- 有机地化学 有机地化学
背景情况:
- 溶解有机物 (DOM) 影响水质和处理过程.
- 了解DOM在环境和退化条件下的结构变化至关重要.
研究的目的:
- 通过DAX-8树脂分离的DOM分量的结构性质的特征.
- 研究降雨和降解 (生物降解,光降解) 对DOM结构的影响.
- 确定特定DOM分数在消毒副产品 (DBP) 的形成中的作用.
主要方法:
- 使用SupeliteTM DAX-8树脂对DOM分数进行隔离.
- 分析结构特征,包括特定的紫外线吸收率和湿化指数.
- 消毒副产品 (DBP) 的形成实验.
- 主要组件分析 (PCA) 用于将DOM结构与DBP前体相关联.
主要成果:
- 降雨增加了水友性 (Hi) 和疏水中性 (HoN) DOM 分数.
- HoN 分数始终表现出较低的吸收率,化和较小的分子大小 (1-20 kDa).
- HoN 分数是三甲 (THM) 形成的主要前体,而Hi和疏水酸分数与酸 (HAAs) 和酸乙 (HANs) 有关.
- HoN 分数与氨酸,氨酸和300-500Da的有机化合物有关,对THM形成有显著的贡献.
结论:
- 疏水中性 (HoN) DOM 分数在三甲形成中起着重要作用.
- DAX-8树脂分离为DOM结构变化提供了详细的见解.
- 这些发现对于有效的水资源管理和确保安全的饮用水供应至关重要,特别是考虑到HoN在降解后的主导地位.
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