云南省安宁地区土壤重金属等元素生态地球化学调查与评价

doi:10.11720/wtyht.2022.1367

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Abstract

Anning City, Yunnan Province, China is an important area of economic development and ecological civilization construction in central Yunnan on the upper reaches of the Yangtze River. This study investigated the contents and enrichment degrees of elements including heavy metals in the surface soil samples that were systematically collected in the Anning area from 2018 to 2020. Then, this study assessed the ecological risks of heavy metals in the soil using the geoaccumulation index and the assessment indices of potential ecological risks and analyzed the sources of heavy metals using the methods of the Pearson correlation and principal component analysis. The results show that heavy metals Cr, Zn, As, Cd, Pb, Hg, and radioactive element U in the soil in the study area have significantly higher contents than corresponding background values of soil in Yunnan Province and show high-degree variation and uneven spatial distribution. Moreover, Cr has the highest accumulation degree of geological anomalies, elements As, Cd, and Hg have high potential ecological risks, and ecological risks are mainly concentrated in the phosphate mining area and the vicinity of steel plants and chemical plants in the Tanglangchuan basin. In terms of sources, Cr, Ni, and Cu may mainly originate from soil parent materials; areas with high Cd, Pb, Zn, and As contents are significantly affected by human activities, and Hg may have a composite pollution source. These results will provide a scientific basis for understanding the sources of heavy metals in soil in Anning City and for the management and protection of local land resources.

Key words： Anning, Yunnan soil heavy metals ecological geochemistry

Received: 01 July 2021 Published: 21 June 2022

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	Articles by authors
	Chen-Zi FAN
	Ji-Hai YUAN
	Cheng-Hai LIU
	Wei GUO
	Dong-Yang SUN
	Wei LIU
	Jiu-Jiang ZHAO
	Jun-Dong HU
	Ling-Hao ZHAO

Cite this article:

Chen-Zi FAN,Ji-Hai YUAN,Cheng-Hai LIU, et al. Eco-geochemical survey and evaluation of heavy metals and other elements in soil in Anning City, Yunnan Province[J]. Geophysical and Geochemical Exploration, 2022, 46(3): 761-771.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1367 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I3/761

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Geological sketch of Anning City (modified according to 1 : 200,000 geological map of Wananning City) ^[25]

Statistics of heavy metals, uranium, thorium, seleniumand fluorine content in the surface soil of the study area (n=2 424)

Geochemistry maps of heavy metals in soil in Anning

Geochemistry maps of U, Th, Se and F in soil in Anning

Geoaccumulation index of soil heavy metals in Anning

Potential ecological risk coefficient of soil heavy metals in Anning

Soil potential ecological risk index spatial distribution of heavy metals in Anning

Pearson correlation coefficient of heavy metals in soil in Anning

Component matrix of soil heavy metals principal component analysis in Anning

Information table of the content of heavy metal elements in the three rock types in the Xianjie phosphate mine in Anning county10^-6

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