Geochemical characteristics and health risk assessment of heavy metal Cd in soil−rice system in Western Jiangxi Province

ZHOU Mo; MEI Lihui; LIU Bingquan; ZHANG Ming; TANG Zhimin; ZONG Leli; WANG Shangxiao; TIAN Fujin; ZHANG Xiaodong; ZHANG Jie; NIU Xiaonan; HUANG Dingling

doi:10.12029/gc20230620001

2025 Vol. 52, No. 1

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Article navigation > Geology in China > 2025 > 52(1): 278-288

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ZHOU Mo, MEI Lihui, LIU Bingquan, ZHANG Ming, TANG Zhimin, ZONG Leli, WANG Shangxiao, TIAN Fujin, ZHANG Xiaodong, ZHANG Jie, NIU Xiaonan, HUANG Dingling. 2025. Geochemical characteristics and health risk assessment of heavy metal Cd in soil−rice system in Western Jiangxi Province[J]. Geology in China, 52(1): 278-288. doi: 10.12029/gc20230620001

Citation:

ZHOU Mo, MEI Lihui, LIU Bingquan, ZHANG Ming, TANG Zhimin, ZONG Leli, WANG Shangxiao, TIAN Fujin, ZHANG Xiaodong, ZHANG Jie, NIU Xiaonan, HUANG Dingling. 2025. Geochemical characteristics and health risk assessment of heavy metal Cd in soil−rice system in Western Jiangxi Province[J]. Geology in China, 52(1): 278-288. doi: 10.12029/gc20230620001

Geochemical characteristics and health risk assessment of heavy metal Cd in soil−rice system in Western Jiangxi Province

1.
Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China
2.
The First Gcological Brigade of Jianggxi Geological Bureau, Nanchang 330200, Jiangxi, China
3.
Basic Geological Survey Institute of Jiangxi Geological Survey Institute, Nanchang, 330200, Jiangxi, China
4.
Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

Fund Project: Supported by the projects of China Geological Survey (No.DD20230103, No.DD20230495, No.DD20190519, No. DD20160321), the National Natural Science Foundation of China (No.42002058) and Jiangxi Province Financially Funded Geological Survey Project (No.20240084).

More Information

Author Bio: ZHOU Mo, male, bron in 1989, master, mainly engaged in environmental geochemistry research; E-mail: zhoumo407@126.com
Corresponding author: HUANG Dingling, female, bron in 1988, doctor, mainly engaged in lithology and geochemistry research; E−mail: Huang_dl@126.com.

Received Date: 20 June 2023

Revised Date: 18 August 2023

Publish Date: 25 January 2025

Abstract

Abstract

This paper is the result of agricultural geological survey engineering.
Objective
Metal elements mainly enter the human body through the food chain, thus affecting health. Research on the geochemical characterization of heavy metal elements in the soil−rice system is significant for the scientific management of arable land, the guarantee of food security and the implementation of the strategy of a healthy China.
Methods
A total of 129 sets of rice seeds and root soil samples were systematically collected, analyzed by chemical analysis to obtain geochemical data such as As, Cd, Hg, Pb, Cr, pH, and soil Cd morphology, thus using the human health risk model to assess the health risk in the study area.
Results
(1) The average soil Cd content in the study area was 0.49 mg/kg, which was significantly higher than the n background value of Jiangxi surface soil. There were 80 soil samples Cd content higher than the risk screening value, accounting for 62%. There were 57 rice seeds with excessive Cd content, the rate of exceeding the standard was 44%. (2) The results of the pollution evaluation of soil Cd and safety evaluation of rice seeds Cd in the study area were poorly correlated. Soil pH was the major influencing factor, with soil alkalinity increasing, soil Cd content increased by 2.3 times, but rice seeds Cd content decreased by 4.5 times. (3) The three fugitive forms of water−soluble, exchangeable and residual Cd in the soil had a significant effect on the Cd content of rice seeds, and the bio−efficacy of Cd was enhanced in a strongly acidic soil environment. (4) Children in the study area have greater health risks than adults, with non−carcinogenic and carcinogenic risk factors dominated by the heavy metal Cd.
Conclusions
The correlation between soil Cd and rice seeds Cd content in the study area is relatively poor, and there are some limitations of misjudgment and omission according to the current norms; the health risk evaluation results revealed that there is a human health risk caused by rice Cd intake in the study area.
- soil−rice system /
- heavy metal /
- health risks /
- land quality geochemical survey /
- agricultural geological survey engineering /
- Western Jiangxi region

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References

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