Contaminant removal efficiency of floating treatment wetlands
Contaminant removal efficiency of floating treatment wetlands
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DOI：
10.1088/1748-9326/abaa0a
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发表时间：
2020-07
影响因子：
6.7
通讯作者：
Shuolin Li;G. Katul
中科院分区：
文献类型：
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作者：
Shuolin Li;G. Katul
漂浮式处理湿地是一种新型的雨洪处理生态基础设施。尽管最近在其使用中的扩散，其污染物去除效率e继续引起研究的关注。在这里，从理想化的FTW的e数值计算在很宽的范围内的流量和几何条件，同时容纳联合贡献的平流，湍流扩散，植被清除。新兴的数学结构描述e承担类似于一个简化的活塞流模型，并支持经验浅盆地模型从长期的实地测量。本模型表明，e仍然显着影响Dämkohler数，量化的植被和流量特性的影响。研究了底流区和污染物堵塞对去除机理的影响。
Floating treatment wetlands are new ecological infrastructures for stormwater treatment. Despite a recent proliferation in their usage, their contaminant removal efficiency e continues to draw research attention. Here, the e from idealized FTWs is numerically computed across a wide range of flow and geometric conditions while accommodating joint contributions of advection, turbulent dispersion, and vegetation removal. The emerging mathematical structure describing e bears resemblance to a simplified plug flow model and supports an empirical shallow-basin model from long-term field measurements. The present model indicates that e remains significantly influenced by a Dämkohler number that quantifies the effects of both vegetation and flow properties. The impacts on e of the underflow region and contaminant blockage on the removal mechanisms are also investigated.