Influence of surface properties and antecedent environmental conditions on particulate-associated metals in surface runoff  

作　　者：Zhenyu Wang Pei Hua Heng Dai Rui Li Beidou Xi Dongwei Gui Jin Zhang Peter Krebs 

机构地区：[1]Institute of Urban Water Management,Technische Universit€at Dresden,01062,Dresden,Germany [2]The Environmental Research Institute,MOE Key Laboratory of Environmental Theoretical Chemistry,South China Normal University,510006,Guangzhou,China [3]Institute of Groundwater and Earth Sciences,Jinan University,510632,Guangzhou,China [4]State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution,Chinese Research Academy of Environmental Sciences,Beijing,100012,China [5]State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi,830011,Xinjiang,China

出　　处：《Environmental Science and Ecotechnology》2020年第2期9-15,共7页环境科学与生态技术（英文）

基　　金：jointly supported by the project of“Collaborative early warning information systems for urban infrastructures(COLABIS)”funded by German Federal Ministry of Education and Research(BMBF,Grant No.:03G0852A).

摘　　要：Particulate-associated trace metals have been regarded as an important pollution source for urban surface runoff.Cd,Pb,Cu,Zn and total solids(TS)washed off two different surfaces(low-elevated facade and road surfaces)under two kinds of antecedent environmental conditions(dry and snow-melting)were determined in this study.Wet-vacuuming sweeping(WVS)and surface washing(SW)methods,representing the maximum pollution potential and common rainfall-induced wash-off condition respectively,were used to collect the particulate matters.The result shows that the wash-off concentrations of trace metals were found in the order of Cd(2.28±2.08 mg/l)<Pb(435.85±412.61 mg/l)<Cu(0.93±0.61 mg/l)<Zn(2.52±2.30 mg/l).The snow-melting process had a considerable influence on the wash-off concentrations of the trace metals on both road and facade surfaces.It reduced >38% and >79% of metals and TS concentrations in the facade surface and road surface runoff respectively.The wash-off concentrations of Cd,Cu,and Zn on the road surface 45e780% higher than those on the facade surfaces.The sensitivity analysis based on the Bayesian network indicates that the wash-off concentrations of metals were mainly dependent on the antecedent environmental conditions or the surface properties while the sampling methods had a minor influence.Therefore,to accurately model the pollutant migration in the surface runoff requires an improving method considering different surfaces and antecedent environment conditions.

关 键 词：Trace metal Road and facade Wash-off SNOWMELT Bayesian network 

分 类 号：TG1[金属学及工艺—金属学]