在地表水中的N-Nitrosodimethylamine前体的自然与人为来源
Mingrui Song1, Junli Wang2, Michael DeNicola2
1Department of Civil and Environmental Engineering, University of Nevada, Reno, NV, 89557-0258, USA; Department of Chemical and Environmental Engineering, University of California, Riverside, CA, 92521, USA.
Water research
|August 28, 2024
概括
废水废水是N-二甲基胺 (NDMA) 前体在出水口附近的主要来源,但这些前体在河流中迅速消散. 自然来源对废水排放的上游NDMA前体的背景水平有所贡献.
科学领域:
- 环境化学环境化学
- 水的质量 水的质量
- 公共卫生 公共卫生
背景情况:
- N-二甲基胺 (NDMA) 是一种致癌的消毒副产品.
- 表面水中的NDMA前体的来源尚不清楚,其潜在来源在人为 (废水) 或自然来源.
- 特鲁基河 (Truckee River) 只有一个废水排放点,提供了一个独特的系统来调查NDMA前体的来源.
研究的目的:
- 为了确定废水与自然来源对特鲁基河NDMA前体的相对重要性.
- 评估废水污水中NDMA前体加载的空间和时间动态.
- 评估废水衍生的NDMA前体在河流环境中的持久性和命运.
主要方法:
- 进行了三次拉格朗的采样活动,以追踪废水排放的上游和下游的NDMA形成潜力 (FP).
- 在废水出水口附近进行了两次24小时采样活动,以捕捉时间变化.
- 分析的NDMA FP作为NDMA前体度的测量.
主要成果:
- 在Truckee河的自然背景NDMA前体在2-28 ng/L之间.
- 在废水排放的下游,NDMA FP增加到18-31 ng/L.
- 从废水中提取的NDMA前体迅速减少,在约6公里范围内从统计学上无法区分出上游水平.
结论:
- 废水废水是NDMA前体在排放点附近的重要,但局部的来源.
- 废水前体的快速减弱表明,它们可能不是下游NDMA形成的主要驱动因素.
- 降解或吸附潜力有限的前体可能无法准确地代表废水中的整体NDMA前体池.
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