结合下水道溢流中的微污染物度波动需要短时间的抽样间隔
Viviane Furrer1,2, Lena Mutzner1, Christoph Ort1
1Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600, Dübendorf, Switzerland.
Water research X
|December 15, 2023
概括
综合下水道溢出 (CSO) 释放有机微污染物. 高分辨率采样显示,小型水域的室内物质波动迅速,与室外物质或大型水域的物质不同,为更好的监测和管理提供了信息.
科学领域:
- 环境科学 环境科学
- 水的质量 水的质量
- 城市水文学 城市水文学
背景情况:
- 综合下水道溢出 (CSO) 是有机微污染物进入水体的重要城市通道.
- 当前在民间社会组织中对微污染物动态的理解是有限的,因为依赖于取样或事件平均度 (EMC).
- 需要高时间分辨率的数据来准确地描述CSO事件期间的微污染物行为.
研究的目的:
- 调查来自不同大小的城市水域的民间社会组织中极性有机微污染物的时间动态.
- 根据来源 (市政废水与城市表面下水) 和采集区特征区分微污染物的行为.
- 评估不同的时间比例采样策略的准确性,以估计EMC.
主要方法:
- 进行了33个废水和13个城市排水微污染物的高时间分辨率 (3分钟间隔) 测量,这些微污染物来自小型 (2,700 P) 和大型 (159,000 P) 水域.
- 分析了不同类别的微污染物随时间变化的度变化.
- 模拟了各种与时间成比例的抽样策略,以评估EMC估计中的错误.
主要成果:
- 在民间社会组织中,微污染物度动态因物质来源和采集区规模而异.
- 在小型水域中,室内产生的物质 (例如药品) 具有很高的时间变化 (在9分钟内变化1-2个数量级).
- 在小型水域的室外物质和大型水域的所有物质的度波动较少.
结论:
- 高时间分辨率采样对于准确捕捉民间社会组织中的微污染物动态至关重要,特别是在小型城市水域的室内物质.
- 对于小型采集区,建议采样间隔为3分钟,以准确监测室内微污染物.
- 了解这些动态可以改善民间社会组织的监测,管理和城市湿气处理系统的设计,最大限度地减少EMC估计中的错误.
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