伊宁市道路土壤重金属污染现状及其环境质量评价

doi:10.13866/j.azr.2019.03.27

Abstract

Abstract: A total of 52 soil samples were collected from the topsoil beside the main roads in the downtown of Yining,and the contents of 6 heavy metals (Hg,Cr,Ni,Pb,Cu and Zn) were determined by spectrophotometer.The environmental quality related to heavy metal pollution in urban soil was studied by using CF and PLI index based on geostatistics.The results showed that: ① The mean values of Hg,Ni,Pb and Cu in topsoil were 2.75,1.48,2.60 and 1.52 times higher than the background values of soil in Xinjiang respectively,and neither Cr nor Zn exceeded their background values of soil in Xinjiang.In addition to Pb,the contents of other elements did not exceed the level Ⅰ of national soil environmental quality (mg·kg^-1); ② The 6 elements in urban soil were all distributed in point and planar patterns,and high values of all these elements occurred in urban soil in the study area,which indicated that human activities,such as economic production,industrial development and road traffic,had negative effects on soil habitats; ③ The Hg and Pb pollution was serious,and the Ni and Cu pollution was slight.Cr and Zn accounted for 17.31% and 82.69% at slight pollution level and 23.08% and 59.62% at non-pollution level,respectively;④ The mean CF values of these elements in urban soil in the study area were in an order of Pb>Hg>Ni>Cu>Zn>Cr.The mean value of heavy metal PLI was 1.20,which indicated that the urban soil was slightly polluted.Pb pollution was more serious than other heavy metals.

Key words: soil heavy metal, soil pollution, environment quality, spatial distribution, Yining

WU Shan-shan, SUN Hui-lan, ZHOU Yong-chao, ZHOU Ling. Heavy Metal Pollution in Urban Soil and Environment Quality in Yinin[J].Arid Zone Research, 2019, 36(3): 752-760.

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Heavy Metal Pollution in Urban Soil and Environment Quality in Yinin

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