废水收集系统中的微污染物的空间和时间变化
Madison Hattaway1, Chris Alaimo1, Luann Wong1
1Department of Civil and Environmental Engineering, University of California, Davis, Davis, CA 95616, USA. tyoung@ucdavis.edu.
Environmental science. Processes & impacts
|January 3, 2024
概括
废水分析揭示了微污染物负载的时间模式,季节性变化如夏季增加的DEET. 了解这些化学动态有助于管理经过处理的废水造成的环境污染.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 水质管理水质管理
背景情况:
- 经过处理的废水废水是水生环境中人为化学物质的重要来源.
- 了解微污染物的来源和季节性对于有效的环境管理至关重要.
- 废水采集系统整合了来自不同来源的多种化学投入.
研究的目的:
- 研究废水收集系统中微污染物的空间和时间模式.
- 为了确定人为化学物质加载到废水处理厂的来源和季节性.
- 为了将复合事件与潜在的来源和环境因素相关联.
主要方法:
- 在九个月的时间里,在六个分采集点和处理厂的流入/排放水中取样废水.
- 使用液体染色学四极飞行时间质谱法 (LC-QTOF-MS) 和气体染色学四极飞行时间质谱法 (GC-QTOF-MS) 分析微污染物.
- 对质谱数据与光谱库进行选,以识别微污染物.
主要成果:
- 确定了多种类型的人类化学品,包括药品,增塑剂,个人护理产品和阻燃剂.
- 微污染物度显示,在整个水域的时间变化大于空间变化.
- 观察到季节性模式,在夏季期间,某些化合物如DEET的度更高.
- 化合物组之间的相关性表明,在下水道系统内有共同的来源或类似的运输路径.
结论:
- 时间动态,特别是季节性,在下水道系统中微污染物加载中起着重要作用.
- 了解化合物相关性可以阐明共享的下水道路径和物理化学过程.
- 这项研究为废水中微污染物的复杂动态提供了宝贵的见解,为管理策略提供了信息.
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