Potentially toxic metal contamination of urban soils and roadside dust in Shanghai, China.
A detailed investigation was conducted to understand the contamination characteristics of a selected set of potentially toxic metals in Shanghai. The amount of Pb, Zn, Cu, Cr, Cd and Ni were determined from 273 soil/dust samples collected within urban area. The results indicated that concentration of all metals except Ni in soils was significant, and metal pollution was even severer in roadside dust. A series of metal spatial distribution maps were created through geostatistical analysis, and the pollution hotspots tended to associate with city core area, major road junctions, and the regions close to industrial zones. In attempt of identifying the source of metals through geostatistical and multivariate statistical analyses, it was concluded as follows: Pb, Zn and Cu mainly originated from traffic contaminants; soil Ni was associated with natural concentration; Cd largely came from point-sourced industrial pollution; and Cr, Ni in dust were mainly related to atmospheric deposition.
Shi
Guitao
G
Key Laboratory of Geographic Information Science of Ministry of Education, East China Normal University, Shanghai 200062, China.
Chen
Zhenlou
Z
Xu
Shiyuan
S
Zhang
Ju
J
Wang
Li
L
Bi
Chunjuan
C
Teng
Jiyan
J
D002104:Cadmium / Q000032:analysis; D002681:China; D002857:Chromium / Q000032:analysis; D002947:Cities; D003300:Copper / Q000032:analysis; D004391:Dust / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods; D006801:Humans; D007220:Industrial Waste; D007854:Lead / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D009532:Nickel / Q000032:analysis; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D001335:Vehicle Emissions; D015032:Zinc / Q000032:analysis
D004391:Dust; D007220:Industrial Waste; D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants; D001335:Vehicle Emissions; D002104:Cadmium; D002857:Chromium; D007854:Lead; D003300:Copper; D009532:Nickel; D015032:Zinc