贵州典型重金属高背景区耕地土壤重金属生态风险评价

doi:10.11720/wtyht.2023.2130

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Abstract

The heavy metal pollution in cultivated land is a hot and key issue, and the pollution status and mechanisms can be accurately grasped through small-scale ecological risk surveys of heavy metals in soil. In this study, the heavy metal ecological risk survey of cultivated land and major crops was carried out in Yancang and Lushan towns, Weining County, Guizhou Province. Meanwhile, the pollution status and ecological risks of heavy metals in soil were assessed using the geoaccumulation index and the potential ecological risk index proposed by Hakanson. The results are as follows. The compound pollution of heavy metals exists in the soil of the cultivated land, with Cd showing the highest pollution level and ecological risks. Meanwhile, Cd exceeds the standard in some potato and maize samples, which is closely related towater-soluble and exchangeable Cd. Therefore, more attention should be paid to the studies on the pollution and speciation of heavy metals in the monitoring and remediation of soil pollution in cultivated land in the future.

Key words： cultivated land root soil crop heavy metal speciation ecological risk

Received: 11 March 2021 Published: 11 October 2023

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	Articles by authors
	Hui-Yan WANG
	Min PENG
	Hong-Hong MA
	Fu-Gui ZHANG

Cite this article:

Hui-Yan WANG,Min PENG,Hong-Hong MA, et al. Ecological risk assessment of cultivated land in typical areas with high heavy metal background values in Guizhou Province[J]. Geophysical and Geochemical Exploration, 2023, 47(4): 1109-1117.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.2130 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I4/1109

Geolocation of the study area and sampling locations

Analytical methods and quality control

Statistical of the elements analytical quality

Characteristic value of the heavy metal content of soil in the study area

The geochemical maps of five heavy metals

Chemical fractions of heavy metals in the siol samples

Proportion of different morphology occurrence of heavy metals

Statistics of I_geo for heavy metals in root soil

Ststistics of the ecological risk index for heavy metals in root soil

Correlation of heavy metals in soil

Characteristics of the heavy metal content in corn and potatoes

Person correlation matrix for Cd in root soil and potato

Person correlation matrix for Cd in root soil and corn

The linear regression analysis of Cd in crop and root soil

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