在UV-LED (275nm) /过程中,溶解有机物和消毒副产品在源水中形成的演变
Xiating Zhao1, Chuze Chen1, Haoran Chen1
1State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China.
Water research
|July 13, 2023
概括
紫外-LED/工艺通过降解溶解有机物 (DOM) 的降解来增强消毒,比单独化更有效. 然而,它增加了和化消毒副产品 (DBPs) 的形成,其中一些是高度细胞毒性的.
科学领域:
- 环境科学 环境科学
- 水处理 化学 水处理 化学
- 光催化作用的光催化
背景情况:
- 紫外线发光二极管 (UV-LED) 为水消毒提供了传统紫外线灯的有希望的替代品.
- 联合UV-LED/工艺需要进一步研究溶解有机物 (DOM) 演变,消毒副产品 (DBP) 形成和毒性.
- 了解DOM反应性和DBP配置文件对于优化水处理策略至关重要.
研究的目的:
- 调查UV-LED (275nm) /工艺对原水中的DOM组成和DBP形成的影响.
- 为了比较UV-LED/工艺的效率和DBP概况与传统的化.
- 评估在UV-LED/处理过程中形成的DBP的毒性.
主要方法:
- 采用二维相关谱 (2DCOS) 来分析DOM.的同步光和UV视频谱.
- 同步光光谱和紫外线光谱被用来监测DOM组件.
- 主要成分分析 (PCA) 用于识别特定DBP的DOM前体.
主要成果:
- 与单独的化相比,UV-LED/过程增强了类似蛋白质和类似的DOM分量的降解.
- 这一过程在处理过程中显著减少了43.8%的碳化DBPs (C-DBPs),但在处理过程中增加了27.3%的性DBPs (N-DBPs).
- 化DBPs (Br-DBPs) 在UV-LED/处理和后增加,二乙二在已确定的DBPs中表现出最高的细胞毒性.
结论:
- 紫外-LED/工艺可以改善DOM降解和减少C-DBPs,但需要对N-DBPs和Br-DBPs进行谨慎管理.
- 非光DOM成分是基,酸和酸的潜在前体.
- 由于N-DBPs和Br-DBPs的细胞毒性增加,特别是在含水中,因此需要考虑UV-LED/的实际应用.
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