生物滞留池对地表径流中常规污染物及全氟化合物的去除效果  

Removal of conventional pollutants and perfluorinated compounds from urban storm water by bioretention system

作　　者：张画荻 华佩 王臻宇 高权[1,2] 李欣仪 张晋[4,5] 应光国 ZHANG Huadi;HUA Pei;WANG Zhenyu;GAO Quan;LI Xinyi;ZHANG Jin;YING Guangguo(College of Environment,South China Normal University,510632 Guangzhou,China;Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety,South China Normal University,Guangzhou 510006,China;School of Civil and Environmental Engineering,Dresden University of Technology,Dresden 01069,Germany;Yangtze Institute for Conservation and Development,Hohai University,Nanjing 210098,China;Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China)

机构地区：[1]华南师范大学环境学院,广州510632 [2]华南师范大学广东省化学品污染与环境安全重点实验室,广州510006 [3]德累斯顿工业大学城市水资源管理研究所,德国德累斯顿01069 [4]河海大学长江保护与绿色发展研究院,南京210098 [5]中国科学院新疆生态与地理研究所,乌鲁木齐830011

出　　处：《环境工程学报》2022年第12期3964-3974,共11页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(22006041);广东省基础与运用基础研究基金资助项目(2021B1515120055);广州市科技计划项目(202002030169)。

摘　　要：生物滞留系统是实现城市地表径流水量调控和水质净化的新型绿色生态系统,但其对全氟化合物的去除效能尚不清楚。本文构建了将传统填料与2~4 mm沸石(体积占比10%)或2~4 mm的改良煤质颗粒活性炭(体积占比10%)混合的2种柱形生物滞留系统,通过动态实验探究了此系统对地表径流中常规污染物和全氟化合物去除效果,分析了系统近1 a的运行效果。结果表明,生物滞留系统的水量削减率随运行时间的增长呈现下降的趋势,平均削减率为(29.8±8.2)%。改良煤质颗粒活性炭生物滞留池对COD、TN、TP、TOC、NH4+-N的平均去除率分别为67.49%、84.78%、76.43%、80.28%、65.43%,优于以沸石为填料的滞留池。6种目标全氟化合物PFPeA、PFHxA、PFHpA、PFOA、PFOS、PFNA的去除率保持在80%以上。滞留池内污染物空间分布特征表明,PFBA主要集中于种植层,而PFPeA、PFHxA、PFHpA、PFOA、PFOS、PFNA则更集中于填料层。Bioretention system is a new and green ecosystem to regulate the urban surface runoff and water quality purification,but its removal efficiency for perfluorinated compounds is unknown.Based on the reported concentrations of perfluorinated compounds in surface runoff,two cylindrical bioretention systems were constructed with traditional fillers mixed with 2~4 mm zeolite(volume ratio of 10%)or 2~4 mm improved coal granular activated carbon(volume ratio of 10%)as the main fillers.The removal efficiencies of conventional contaminants and perfluorinated compounds by both systems were investigated,as well as the one-year operation efficiency.The results showed that the water reduction rate decreased with the extension of operation time,and the average reduction rate was(29.8±8.2)%.After one-year operation,the average removal rates of COD,TN,TP,TOC and N H4+-N by the bioretention column with the improved coal granular activated carbon were 67.49%,84.78%,76.43%,80.28%and 65.43%,respectively,which were better than bioretention column with zeolite.The removal efficiencies of PFPeA,PFHxA,PFHpA,PFOA,PFOS and PFNA maintained above 80%.The spatial distribution of pollutants showed that PFBA was mainly concentrated in the plant layer,while PFPeA,PFHxA,PFHpA,PFOA,PFOS and PFNA were concentrated in the filler layer.

关 键 词：生物滞留系统 全氟化合物 地表径流 削减效率 

分 类 号：X703[环境科学与工程—环境工程]