环境工程学报2026，Vol.20Issue(4)：1132-1142,11.DOI:10.12030/j.cjee.202410085
秸秆型复合生物滞留系统对城市地表径流中污染物的去除
Purification effect on urban runoff using straw-type composite biological retention system
摘要
Abstract
Surface runoff pollution has emerged as a significant contributor to water pollution.The present study presents an integrated composite bioretention system that comprises a straw zone,an aquatic plant zone,and a biochar zone,designing to purify urban surface runoff for subsequent reuse in green water applications.The study investigated the removal efficiency for both conventional pollutants and the polycyclic aromatic hydrocarbons(PAHs)in surface runoff,along with an analysis of the microbial community structure within the substrate.The results indicated that the system effectively removed COD,TN,TP,and TSS with removal efficiency of 81.1,98.1,79.1,and 90.3％,respectively.The treated effluent met the standards outlined in"Water Quality for Landscape Environment"(GB/T 18921-2019)and demonstrated robust resistance to pollution and hydraulic loads.Notably,the alkali-modified straw zone played a pivotal role in pollutant removal,physically adsorbing and capturing suspended particles in water,while the released carbon source enhanced the total nitrogen removal capacity.This straw zone also boasted the highest microbial diversity within the system,with Proteobacteria and Firmicutes accounting for 54.3 and 21.9％of the relative abundances,respectively.Furthermore,the system demonstrated a strong removal capability for 16 priority PAHs,reducing the effluent's toxicity equivalent by 86.5％.Specifically,the straw zone was capable of completely removing four high-ring PAHs:benzo[a]pyrene(BaP),dibenzo[a,h]anthracene(DahA),benzo[g,h,i]perylene(BghiP),and indeno[1,2,3-cd]pyrene(IcdP).Conversely,aquatic plants and biochar exhibit excellent removal efficacy for medium and low-ring PAHs.关键词
城市径流/生物滞留系统/微生物群落结构/多环芳烃Key words
urban runoff/biological retention system/microbial community structure/polycyclic aromatic hydrocarbons分类
资源环境引用本文复制引用
何林,朱正,马舜,何华,梁文艳..秸秆型复合生物滞留系统对城市地表径流中污染物的去除[J].环境工程学报,2026,20(4):1132-1142,11.基金项目
国家自然科学基金资助项目(51672028) （51672028）
水体污染控制与治理科技重大专项资助项目(2018ZX07110-003) （2018ZX07110-003）
中铁第五勘察设计院集团有限公司科技研究开发计划项目资助项目(T5Y2022-B15) （T5Y2022-B15）
