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紫外线₂₅₄诱导的键裂变:从N-chloro-peptides中形成N-DBP前体的关键途径

Zilong Song¹, Xinran Zhang¹, Wen Xu¹

¹School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.

|August 15, 2025

概括

紫外线光在水中快速降解N-chloro-peptides (NCl-peptides),但键提供光解电阻. 这一过程可以增加化消毒副产品 (N-DBPs),这些在性条件下会减少.

科学领域:

环境化学环境化学
水处理技术水处理技术
摄影化学的使用.

背景情况:

在自然水中普遍存在,在饮用水净化过程中可以形成消毒副产品 (N-DBPs).
了解N-chloro-peptides (NCl-peptides) 在治疗过程中的行为对于管理N-DBP形成至关重要.

研究的目的:

在UV254照射下研究NCl-的降解动力学.
阐明从NCl中形成N-DBP的机制.
评估水条件对N-DBP产量的影响.

主要方法:

在UV254照射和黑暗对照下对9个NCl-的降解进行了系统的研究.
与NCl-和NCl-氨基酸单体之间的光降解速率的比较.
液体染色学-四极飞行时间质谱学 (LC-QTOF/MS) 用于结构特征.
在不同的pH条件下评估N-DBP形成潜力.

主要成果:

UV254辐射显著加速了NCl-的降解 (8.6到806.6倍).
由于键,NCl-酸比NCl-氨基酸具有更强的光解电阻.
紫外线照射增加了N-DBP的形成潜力,但弱性条件抑制了产量.
LC-QTOF/MS确定了一条关键的途径,涉及C-N键裂解和胺转化为胺转化.

结论:

键在UV水处理过程中N-DBP形成中起着关键作用.
紫外线照射的有效性受结构的影响,键赋予稳定性.
度调节和前体去除是减轻饮用水中N-DBP风险的可行策略.

关键词:

消毒副产品消毒的副产品溶解的有机气是一种有机气.饮用水的处理方法这是一种N-Cl-酸.紫外线 (254) 辐射辐射

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