四川邻水县华蓥山—西槽土壤Cu地球化学特征与生态健康

doi:10.11720/wtyht.2022.1317

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Abstract

Copper (Cu) is an essential trace element for the human body. However, there is no recommended value for Cu content in crops in China, and there is no standardon Cu content in soil for developing Cu-rich land resources. This paper takes the Huaying Mountain-Xicao cultivated land areas in Linshui County, Sichuan Province as the study area. Based on the survey results of the Cu contents in surface soil, crops, and root soil obtained from the 1∶50 000 land quality geochemical survey, this study investigated the contents and distribution of Cu in soil and crops and analyzed the influencing factors of the biological enrichment coefficient (BAF) of Cu in corn seeds. Moreover, it established a BAF prediction model of Cu in corn seeds and proposed the optimal ranges of Cu contents for developing Cu-rich corn and land resources. The study results are as follows. The Cu content in the surface soil of the study area ranges from 3.33×10^-6 to 173×10^-6, with an average and a median of 26.85×10^-6 and 25.60×10^-6, respectively. The soil with high Cu content is mainly distributed in the areas in Huaying Mountain in Linshui County where basalts, carbonate rocks, and carbonaceous shales are soil-forming rocks. In contrast, the soil with low Cu content is distributed in areas in Xicao where Jurassic sandshaleserves as soil-forming rocks. The Cu content in corn seeds in the study area ranges from 0.80×10^-6 to 2.71×10^-6, with an average and a median of 1.76×10^-6 and 1.82×10^-6 respectively. To ensure the safety of human beings in terms of Cu intake, the optimal Cu contents in corn seeds and soil in the study area should be 0.756×10^-6~10.080×10^-6 and 12.67×10^-6~169.00×10^-6, respectively.

Key words： Cu content in corn seeds prediction model Linshui County,Sichuan Province ecological health soil geochemistry dietary nutrition

Received: 27 May 2021 Published: 25 February 2022

ZTFLH:

P632

Corresponding Authors: YANG Zhong-Fang E-mail: zhaoxiaoyuan@cugb.edu.cn;zfyang01@126.com

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	Xiao-Yuan ZHAO
	Zhong-Fang YANG
	Hui-Yi CHENG
	Xu-Dong MA
	Jue WANG
	Zhi-Kun LI
	Chen WANG
	Ming-Hui LI
	Feng-Hua LEI

Cite this article:

Xiao-Yuan ZHAO,Zhong-Fang YANG,Hui-Yi CHENG, et al. Geochemical characteristics and ecological health-related ranges of Copper in soil in Huaying Mountain-Xicao in Linshui County, Sichuan Province[J]. Geophysical and Geochemical Exploration, 2022, 46(1): 238-249.

URL:

https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1317 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I1/238

Location of the study area

Geological map of Linshui County

Sample distribution map of the study area

Analysis methods and detect limits for samples

Requirements for accuracy and precision of soil sample analysis methods

Cu content of topsoil sampling in the study area10^-6

Geochemical map of Cu content of topsoil in the study area

Content of Cu and pH of different parent material

Risk screening values of Cu pollution in soil10^-6

Scatter plot of Cu content in corn seeds and soil

Correlation analysis of BAF with soil elements

Scatter plot of BAF predicted value and measured value

The average intake of all kinds of food in Sichuan Province g/d

Scatter plot of BAF and SiO₂/Al₂O₃content

Scatter plot of BAF and Corg content

Scatter plot of BAF and TFe₂O₃ content

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