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Geochemical baseline determination and contamination of heavy metals in the urban topsoil of Fuxin City,China

Journal of Arid Land 2020年第6期12卷 1001-1017页

作者： ZHANG Hua YU Miao XU Hongjia WEN Huan FAN Haiyan WANG Tianyi LIU Jiangang School of Geography Liaoning Normal UniversityDalian 116029China

Urban topsoil is the most frequent interface between human society and natural *** accumulation of heavy metals in the urban topsoil has a direct effect on residents'life and *** geochemical baseline of heavy metals is an objective description of the general level of heavy metals in the urban ***,the determination of geochemical baseline is necessary for regional environmental management,especially in coal cities prone to heavy metal *** metal pollution has become an environmental problem in Fuxin City,China for a long *** establish the geochemical baseline of heavy metals in the topsoil of Fuxin City and to evaluate the ecological risk of the topsoil,we collected 75 topsoil samples(0–20 cm)and analyzed the concentrations of Cu,Ni,Zn,Pb,Cr,Cd,Hg and As through X-ray fluorescence spectrometry,atomic absorption spectrometry and inductively coupled plasma optical emission *** determined the geochemical baseline of heavy metals in the topsoil of Fuxin City by using iteration removal,box-whisker plot,cumulative frequency curve and reference metal normalization;evaluated the contamination risk and ecological risk of the topsoil by using the baseline factor index,Nemerow index and Hakanson potential ecological risk index;and identified the source category of heavy metals in the topsoil by using a pedigree clustering *** showed that the geochemical baseline values were 42.86,89.34,92.23,60.55,145.21,0.09,0.08 and 4.17 mg/kg for Cu,Ni,Zn,Pb,Cr,Cd,Hg and As,*** results of Nemerow index and Hakanson potential ecological risk index indicated that the urban topsoil in the study area was slightly contaminated and suffering low potential ecological *** main contaminated areas dominated in the middle part and northeast part of the study area,especially in the western Haizhou Strip *** result of baseline factor index indicated that Hg and Cd were the major pollution *** a pedig

关键词： heavy metals urban topsoil geochemical baseline contamination index pedigree clustering heatmap

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