湖北红安县生态地质调查土壤重金属分布特征及生态风险评价

doi:10.11720/wtyht.2022.1398

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Abstract

This study selected the Jinsha Lake and the Miersi Industry Park as key survey areas to study the distribution of heavy metals in soil in Hong’an County, Hubei Province. Samples were collected from surface soil and vertical soil profiles to assay the contents of eight heavy metals, i.e., Cu, Pb, Zn, Cr, Ni, Cd, As, and Hg. Both the single factor pollution index method and the potential ecological hazard index method were used to assess the distribution and the ecological risk of heavy metals. The study results are as follows:The average contents of the above eight heavy metals were 21.48×10^-6, 21.75×10^-6, 63.60×10^-6, 53.24×10^-6, 20.25×10^-6, 0.13×10^-6, 5.44×10^-6, and 0.04×10^-6,respectively. The cumulative Cu, Cr, Ni, and Cd are relatively enriched in the soil and their pollution is slight. The heavy metals show distinct distribution patterns. Minor pollution exists in the Gaoqiao-Yongjiahe basic-ultrabasic melange zone and around the Miershi Industrial Park, while severe pollution exists in Mn-Co mineralized points scattered in the northeastern Baliwan. Pb and Hg are enriched in the surface layer but decrease in the deep layer, Cr and Ni show an inverse trend, while other elements show indistinct distribution patterns. Cd and Hg have high potential ecological risk individually in the soil in the surveyed areas. The comprehensive ecological risk assessment based on Cd and Hg shows that the surrounding area of the Jinsha Lake Chengguan Town, the basic-ultrabasic melange zone, the surrounding area of the Miersi Industrial Park, and the Baliwan manganese-cobalt mineralization zone are areas with moderate potential ecological risks, where ecological supervision and protection should be strengthened. This study can provide a scientific basis for later ecological management in Hongan. It also serves as a good soil reference for other ecological geological surveys.

Key words： ecological geology soil heavy metal distribution characteristic ecological risk

Received: 16 July 2021 Published: 17 August 2022

ZTFLH:

P632

Corresponding Authors: Wan Xiang E-mail: zilongcug@163.com;wxzgdz@hotmail.com

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	Articles by authors
	Zi-Long JU
	Zhi-Jun QIN
	Xiang Wan
	Hang YUAN
	Xiao-Bo ZHANG
	Deng WANG

Cite this article:

Zi-Long JU,Zhi-Jun QIN,Xiang Wan, et al. Accessing the distribution and ecological risks of heavy metals in soil in Hong’an County, Hubei Province through ecological geological surveys[J]. Geophysical and Geochemical Exploration, 2022, 46(4): 988-998.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1398 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I4/988

Overview of study area and the distribution of sampling points

Reference value of heavy metal contents in single factor index method10^-6

Statistics for soil heavy metal contents in the study area

Statistics of heavy metals exceeding the standard in the survey area

Pollution assessment of heavy metal content exceeding standard in study area

Distribution of heavy meatal pollution assessment and samples exceeding standard in Jinshahu investigation area

Distribution of heavy meatal pollution assessment and samples exceeding standard in Miersi investigation area

Statistics of soil heavy metal content in vertical profile

Soil profiles for heavy metal contents

Principal components analysis for soil heavy metal content in study area

Evaluation criteria of potential ecological hazard derived from heavy metal

Ecological risk distribution in the study area

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