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基于颗粒大小的评估,对降低固体,多环芳 (PAH) 和多二 (PCB) 的雨水控制措施进行评估

César Gómez-Ávila¹, Balaji Rao², Tariq Hussain³

¹Texas Tech University, Department of Chemical Engineering, Lubbock, TX, USA.

|February 22, 2025

概括

雨水控制措施有效地去除诸如PAH和PCB等颗粒结合的污染物,特别是来自较大的颗粒. 然而,去除溶解的污染物仍然是一个挑战,维护对于持续的SCM性能至关重要.

科学领域:

环境工程环境工程
水质管理水质管理
污染物运输污染物运输

背景情况:

雨水排放带有污染物,如多环芳 (PAH) 和多双 (PCB).
这些污染物与各种颗粒大小有关,影响它们的命运和在水生系统中的运输.
有效的雨水控制措施 (SCM) 对于减轻进入水道的污染物负载至关重要.

研究的目的:

为了评估不同SCM的PAH和PCB的去除效率.
为了研究颗粒大小对污染物去除的影响.
评估SCM维护对性能的影响.

主要方法:

在各种颗粒大小分数 (粘土,泥,沙子) 中溶解和颗粒相中的PAH和PCB的分析.
在风暴事件期间,在多个SCM (生物过器,保留池,液态分离器,子过器) 的入口和出口处取样.
微粒有机碳含量与污染物度之间的相关性分析.

主要成果:

粗颗粒 (>20微米) 呈现出更高的有机碳分数和污染物度.
所有评估的SCM都显示了颗粒结合污染物的高去除率,特别是在较粗的分数中.
在所有SCM中观察到溶解相PAH和PCB的最小去除.
由于维护问题,如生物过器侵蚀和过器堵塞,SCM性能可能会受到损害.

结论:

颗粒大小显著影响污染物分布,较大的颗粒集中PAH和PCB.
在减少颗粒结合污染物方面,SCM是有效的,但对于溶解的污染物来说,效果不那么好.
定期维护对于确保SCM在管理雨水质量和防止沉积物再污染方面的长期有效性至关重要.

关键词:

绿色和灰色基础设施颗粒大小分布颗粒大小分布聚二 (PCB) 是一种多二化合物.多环芳 (PAHs) 是一种多环芳.沉积物的再污染雨水管理雨水管理

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