Ecological Risks and Spatial Distributions of Heavy Metals in Beijing Atmospheric Dust
Dejun Wan1, Guanglin Yang1, Jinsong Yang1, Changlin Zhan2
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1Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences,
Shijiazhuang 050061, China
2School of Environmental Science and Engineering, Hubei Polytechnic University,
Huangshi 435003, China
Submission date: 2017-06-09
Final revision date: 2017-08-03
Acceptance date: 2017-08-04
Online publication date: 2018-01-15
Publication date: 2018-01-26
Pol. J. Environ. Stud. 2018;27(2):881–887
To investigate ecological risks and spatial distributions of heavy metals in atmospheric particles in the Beijing urban area, atmospheric dust was collected from 62 sites and 12 heavy metals in their <63 μm fractions were measured. Results indicate that V, Cr, Mn, Co, Ni, and Ba in the dust are basically unpolluted by human activities; whereas Cu, Zn, As, Cd, Sb, and Pb are moderately to heavily polluted. These metals (not including Ba) in most dust show a high ecological risk (RI = 809 ±585, ranging 291-4,848), predominantly contributed by Cd (71%) and Sb (14%). Relatively higher risks mainly occur in the eastern and northwestern urban areas. The high risks in the east are caused mainly by Cd pollution associated with coal-burning and industrial and traffic activities, while those in the northwest are caused mainly by Sb pollution associated with point pollution sources and Cd pollution from traffic activity. This is significant for controlling atmospheric heavy metal pollution over the Beijing urban area and investigating atmospheric metal pollution in other cities.