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在干旱沿海废水中选消毒副产品:使用GC×GC-TOFMS,被动采样和NMF解卷算法的工作流程

Muhammad Usman Siddiqui¹, Muhammad Sibtain¹, Farrukh Ahmad^2,3

¹Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology, Islamabad 48000, Pakistan.

Journal of xenobiotics

|May 28, 2024

概括

这项研究使用先进的分析技术在处理废水中确定了许多消毒副产品 (DBPs). 许多DBP显示出显著的水生毒性和环境持久性,突出了废水处理过程的风险.

科学领域:

环境化学环境化学
分析化学分析化学
水处理处理水的方法

背景情况:

城市废水的消毒对于病原体控制至关重要.
消毒过程产生了大量的,通常不受监管的消毒副产品 (DBPs).
分析方面的挑战阻碍了各种DBP的识别和风险评估.

研究的目的:

开发和应用一个全面的分析工作流程,用于在经过处理的废水中对DBP的可疑查.
识别和描述在三级废水处理过程中形成的DBP.
评估已识别的DBP的环境命运,持久性和毒性.

主要方法:

采用聚二甲基西洛 (PDMS) 被动采样器进行样本采集.
采用了全面的二维气体染色学-飞行时间质谱法 (GC×GC-TOFMS).
应用非负矩阵因数分解 (NMF) 进行光谱解卷,以及用于峰值赋值和DBP识别的先进方法.

主要成果:

通过使用八个过器选过程成功分离了22个候选DBP,并确定了7个额外的DBP.
核磁场提高了17%的光谱匹配,先进的验证方法提高了峰值分配的准确性.
检测到普遍存在的化DBPs,其中11个显示出高环境持久性和显著的水生毒性,包括发育和内分泌干扰作用.

结论:

综合分析方法为环境监测中的DBP识别和风险评估提供了强大的工具.
鉴定的DBP由于其毒性和持久性,对水生生态系统构成重大风险.
废水处理消毒需要进一步研究DBP的形成和缓解策略.

关键词:

GC×GC-TOFMS 的时间在NMF的光谱解卷过程中.消毒副产品的消毒方法危险评估危险评估危险评估通过被动采样器进行采样.

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