title: Characteristic comparison of heavy metal contamination between road-deposited and roof-deposited sediments in suburban area.
abstract: Surface-deposited sediment in urban area is an essential environmental medium for assessing heavy metal contamination. A total of 10 sampling trips were conducted to collect road-deposited and roof-deposited sediments for the comparison of nickel (Ni), copper (Cu), cadmium (Cd), lead (Pb), zinc (Zn), and chromium (Cr) contamination characteristics. Results indicated that roof sediment appeared to have a finer size distribution than road sediments. Roof sediment indicated higher metal concentration and lower surface loading than road sediment. The impact of particle size on heavy metal contamination was quantified by using the developed pioneering term of finer particle effect factor; it differed according to surface types and grain size fraction. Particles in individual grain size fraction showed different contribution to the surface loading for bulk sediments. No consistent trend was found for the grain size fraction loading along with grain size for the studied heavy metals for road sediments. In contrast, an asymmetric "W" trend was observed for the roof sediments, and it had the following results: Fraction of <63 and 250-500 μm showed higher loading, while fraction of 90-125 and >850 μm indicated the smaller loading. Findings above facilitated the appropriate management practice selection for the treatment of surface-deposited sediments.
authors.affiliation: Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China.|Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Joint Laboratory of Atmospheric Pollution Control, Nanjing, 210044, China.
authors.forename: Jianghua
authors.initials: J
authors.lastname: Yu
authors.affiliation: Guangdong Key Laboratory for Urbanization and Geo-Simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou, 510275, China. yuhaixia@mail.sysu.edu.cn.
authors.forename: Haixia
authors.initials: H
authors.lastname: Yu
authors.affiliation: Pearl River Hydraulic Research Institute of PRWRC, Guangzhou, 510611, China.
authors.forename: Liqiang
authors.initials: L
authors.lastname: Xu
authors.affiliation: Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China.|Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Joint Laboratory of Atmospheric Pollution Control, Nanjing, 210044, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Tao
authors.affiliation: Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China.|Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Joint Laboratory of Atmospheric Pollution Control, Nanjing, 210044, China.
authors.forename: Yanxing
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China.|Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Joint Laboratory of Atmospheric Pollution Control, Nanjing, 210044, China.
authors.forename: Yuhao
authors.initials: Y
authors.lastname: Hua
authors.affiliation: Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China.|Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Joint Laboratory of Atmospheric Pollution Control, Nanjing, 210044, China.
authors.forename: Namwiinga Babra
authors.initials: NB
authors.lastname: Nkolola
mesh_terms: D002104:Cadmium; D004784:Environmental Monitoring; D019015:Geologic Sediments; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D015032:Zinc
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D002104:Cadmium; D015032:Zinc
keywords: Concentration; Heavy metals; Road and roof sediments; Size fraction loading