饮用水非目标分析结果的家庭级变量为揭示分布系统组件引入的组成部分提供了一个工具
Gabrielle P Black1, Thomas M Young1
1Department of Civil and Environmental Engineering, University of California, One Shields Ave., Davis, California 95616, United States.
Environmental science & technology
|April 23, 2025
概括
龙头水含有各种各样的化学物质,其中许多源自配送系统中的塑料材料. 这项研究分析了家庭自来水和零售水品牌的非目标化学变异性.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 评估水质水质的评估.
背景情况:
- 饮用水质量受其通过配送系统的旅程的影响.
- 了解自来水中的化学变异性对于评估暴露至关重要.
- 以前的研究还没有完全描述非目标化学成分的变异性.
研究的目的:
- 分析家用自来水和零售用水中的非目标化学成分变化.
- 识别具有高源内可变性的化合物及其潜在来源.
- 调查配电系统对饮用水化学特征的影响.
主要方法:
- 在两个季节内,对120个家庭和15个零售水品牌的自来水进行了分析.
- 使用高分辨率质谱与液体 (LC) 和气体色谱 (GC) 相结合.
- 优先考虑每个系统的10个化学特征,研究变化系数最高.
主要成果:
- 确定了134种具有高可信度结构注释的化合物.
- 与塑料相关的化合物是最常见的来源类别 (例如,来自管道,包装).
- 其他来源包括配电系统组件,消毒副产品和源水污染物 (PFAS,糖).
结论:
- 饮用水中含有在分配过程中引入的各种成分.
- 塑料材料是自来水中化学变化的重要来源.
- 评估使用地点的化学物质暴露对于准确的风险评估至关重要.
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