黄石市城市边缘区土壤重金属分布特征、风险评价及溯源分析

doi:10.11720/wtyht.2021.1497

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Abstract

To study the quality of the arable soil in peri-urban area of Huangshi City, the present research focused on analyzing heavy metals distribution characteristics, assessed its risk to environment, and subsequently identified its sources by multivariate statistical analysis based on high-density topsoil and subsoil sampling. The results show that the content of heavy metals in the soil isas follows: As (5.2×10^-6~155.9×10^-6), Pb (19.2×10^-6~426.1×10^-6), Hg (0.012×10^-6~1.823×10^-6), Cd (0.03×10^-6~4.59×10^-6), Zn (34.8×10^-6~529.6×10^-6), Ni (8.5×10^-6~86.2×10^-6), Cu (16.52×10^-6~104.39×10^-6) and Cr (51.2×10^-6~145.5×10^-6). The average content of Cd exceeds the regional soil environmental background value, and Cd even exceeds the soil risk screening value of agricultural land. Heavy metal pollutants are mainly concentrated in the topsoil above 40 cm. Among the land use types, paddy lands and dry lands are heavily polluted, and Cd, As and Pb are the main pollutants. In paddy lands, As, Pb, Cu and Zn exhibit slight pollution, Cd and Hg exhibit moderate pollution, whereas Cr and Ni do not exhibit pollution. In dry lands and forest lands, As, Pb and Hg exhibit slight pollution, Cd exhibits moderate pollution and Cr, Cu, Ni and Zn do not exhibit pollution. The multivariate statistical analysis indicates that Cr and Ni in the soil of the study area are of natural origin and related to the parent material of the soil. Cd, Pb, As and Hg are mainly of anthropogenic pollutants, which is related to high-intensity industrial and mining production and sulfide mineral acidification release in Huangshi City.However Cu and Zn constitute mixed sources, partly from soil environmental background, and partly from human activities and industrial production emissions.

Key words： peri-urban heavy metals distribution characteristics source identification risk assessment

Received: 27 October 2020 Published: 15 December 2021

ZTFLH:

P632

Corresponding Authors: GAO Bao-Long E-mail: 527657213@qq.com;45371309@qq.com

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	Articles by authors
	Yu-Zhen YANG
	Sen-Rong LIU
	Yong YANG
	Li-Fen LI
	Sheng-Hua LIU
	Yi-Hua KANG
	Xin-Qiang FEI
	Yun-Liang GAO
	Bao-Long GAO

Cite this article:

Yu-Zhen YANG,Sen-Rong LIU,Yong YANG, et al. Heavy metals in peri-urban soil of Huangshi: Their distribution, risk assessment and source identification[J]. Geophysical and Geochemical Exploration, 2021, 45(5): 1147-1156.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1497 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I5/1147

Study area and location of sampling sites

Statistical summary of heavy metals in soil of study area

Histogram of heavy metals in soil (n=276)

Comparison of pH and heavy metals content between the topsoil and the deepsoil
a—paddy land (surface and deep soil samples each 90);b—dry land (topsoil and deepsoil samples each 30);c— forest land (surface and deep soil samples each 18)

Heavy metals content profiles in paddy land(the dotted line denoted average content in this profile)

Statistics of accumulation index of heavy metals in the surface soil of the study area

Index of geo-accumulation for heavy metals in different land use types of topsoil

Pearson correlation coefficient matrix for concentrations ofheavy metals in study area soil(n=276)

Hierarchical clustering of heavy metals in study area soil (n=276)

Varimax-rotated factor (three-factor) model for soil samples(n=276)

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