摘要
以城市典型屋面材质(油毡、塑钢、瓦)为研究对象,通过人工模拟降雨考察不同前期晴天数对不同材质屋面径流污染特征的影响。结果表明,不同材质屋面径流中悬浮物(SS)、化学需氧量(COD)、总磷(TP)和总氮(TN)的场次降雨径流平均浓度由大到小都依次为油毡屋面、瓦屋面和塑钢屋面。不同材质屋面径流中重金属的场次降雨径流平均浓度各不相同。总体而言,污染物浓度随前期晴天数增加而增大,主要是小粒径的颗粒物体积分数增加,而大粒径的颗粒物体积分数反而减小。屋面径流中SS是COD、TP和重金属的主要载体,污染物与小粒径的颗粒物相关性更高,因此要想控制屋面径流中的COD、TP和重金属,关键是控制细小的颗粒物。
Typical roof materials(asphalt felt,plastic steel and tile)in cities were taken as research object,the pollution characteristics of runoff from roofs of different materials under different antecedent dry period were investigated through artificial simulated rainfall.Results showed that the event mean concentration(EMC)of SS,COD,TP and TN in a descending order was asphalt felt roof,tile roof and plastic steel roof,while the effect of roof materials on the EMC of heavy metals was different.In general,the concentrations of pollutants increased with antecedent dry period.In particular,the volume fraction of small particles increased with the increase of the antecedent dry period,while that of big ones decreased.SS in roof runoff were major carriers of COD,TP and heavy metals,pollutants were especially correlated with small particles.Therefore,in order to control COD,TP and heavy metals in roof runoff,it was suggested to control small particles.
作者
张昱
陈超
王瑞梅
邱春生
谢尚宇
祁丽
孙力平
宋现财
赵乐军
ZHANG Yu;CHEN Chao;WANG Ruimei;QIU Chunsheng;XIE Shangyu;QI Li;SUN Liping;SONG Xiancai;ZHAO Lejun(School of Environmental and Municipal Engineering,Tianjin Chengjian University,Tianjin 300384;China Railway Design Corporation,Tianjin 300142;PowerChina Huadong Engineering Corporation Limited,Hangzhou Zhejiang 311122;Tianjin Municipal Engineering Design and Research Institute,Tianjin 300384)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2024年第4期502-506,512,共6页
Environmental Pollution & Control
基金
中国铁路设计集团有限公司科技开发课题(No.2022BJH011)
天津市高等学校大学生创新训练计划项目(No.202210792031)。
关键词
径流污染
前期晴天数
屋面
颗粒物
重金属
runoff pollution
antecedent dry period
roof
particle
heavy metal
