环境工程学报2025，Vol.19Issue(5)：1131-1139,9.DOI:10.12030/j.cjee.202410089
土工布用于城市径流中悬浮颗粒物静态过滤的特性分析
Analysis of the static filtration characteristics of geotextiles for suspended solids in urban runoff
摘要
Abstract
In urban runoff pollution control,geotextiles are commonly used for the removal of suspended solids(SS).To compare the filtration characteristics of different geotextiles and screen suitable filter materials,laboratory-scale experiments were conducted to investigate the permeability coefficient,filtration dynamics,and the effectiveness of geotextiles in filtering SS from urban runoff.The results indicate that the compactness n is the primary factor affecting the permeability coefficient of geotextiles,with the permeability coefficient decreasing as compactness increases.Stacking geotextiles creates interfacial resistance,leading to a reduction in the permeability coefficient.Increasing the thickness and compactness of geotextiles enhances their filtration efficiency for SS.The filtration process of geotextiles can be divided into three stages:high-speed non-Darcy flow,Darcy flow,and low-speed non-Darcy flow,with the low-speed non-Darcy flow being the dominant stage.Based on the unit cumulative load,a filtration dynamics formula applicable to the low-speed non-Darcy flow stage was derived,which can be used to evaluate the anti-clogging capacity of different geotextiles.Among the tested materials,double-layer 250 g·m-2 geotextiles demonstrated superior anti-clogging performance and removal efficiency.The findings of this study provide valuable data references for the application of geotextiles in controlling urban runoff pollution.关键词
土工布/过滤特性/悬浮颗粒物/径流污染Key words
geotextiles/filtration characteristics/suspended solids/runoff pollution分类
环境科学引用本文复制引用
王梦颖,黄忠臣,李俊奇,杜晓丽,王文亮,王建龙,薛重华,王文海,郭昕..土工布用于城市径流中悬浮颗粒物静态过滤的特性分析[J].环境工程学报,2025,19(5):1131-1139,9.基金项目
国家重点研发计划资助(2021YFC3200701) （2021YFC3200701）
