Accumulation Characteristics and Health Risk Assessment of Heavy Metals in Soil-Crop System Based on Soil Parent Material zoning

被引：0
|
作者：
Chen Z.-W. [1 ,2 ,3 ,4 ]
Xu J. [1 ,4 ]
Hou Z.-L. [1 ,4 ]
Peng M. [5 ]
Yang F. [5 ]
Chen J. [1 ,4 ]
Xu Y.-Q. [1 ,4 ]
Yang S.-Y. [1 ,4 ]
Li J.-Y. [1 ,4 ]
Yu L.-S. [2 ,3 ]
机构：
[1] Yunnan Institute of Geological Survey, Kunming
[2] School of Earth Sciences, Chengdu University of Technology, Chengdu
[3] Applied Nuclear Technology in Geosciences Key Laboratory of Sichuan Province, Chengdu University of Technology, Chengdu
[4] Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization, MNR, Kunming
[5] Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang
来源：
Huanjing Kexue/Environmental Science | 2023年 / 44卷 / 01期
关键词：
health risks; high geological background; parent material; soil heavy metals; soil-crop system;
D O I：
10.13227/j.hjkx.202203205
中图分类号：
学科分类号：
摘要：
This study used both the element occurrence form analysis and the chronic health risk assessment method to investigate the accumulation characteristics of heavy metals in the soil-crop system and the health risk assessment of agricultural products in northeastern Yunnan, which is a typical area of Southwest China where heavy metals are enriched in soil. Based on the study of 1 137 groups of agricultural products and corresponding root soils, the results showed that the soil cadmium (Cd) and lead (Pb) in the lead-zinc ore concentration area were higher than the risk-intervention values of the "Soil Environmental Quality Risk control standard for soil contamination of agricultural land" (GB 15618-2018), whereas the soil Cd in the other parent material areas was within the screening-intervention buffer zone, and Pb was below the minimum risk-screening value. According to the National Food Safety Standard of China (GB 2762-2017), the heavy metal Cd in potatoes and soybeans in the area seriously exceeded the standard, the heavy metal Pb in tartary buckwheat and walnut exceeded the limit value, and the exceeding rate of heavy metal Cd in crops from these parent material areas showed: clastic rock > basalt > lead-zinc ore > carbonate ≈ Quaternary sedimentary > sand (mud) rock. According to the U. S. Environmental Protection Agency's assessment method for the chronic health risk of heavy metal intake by humans, the grains and potatoes, staple foods, and fruits had low chronic health risks of heavy metal intake. Agricultural products from the parent material area of clastic rock, sand (mud) rock, Quaternary sedimentary, and lead-zinc ore concentration showed health risks; with the change in soil physical and chemical properties and the increase in the types of edible crops, the risk will gradually increase. Based on this research, it is urgent to carry out real-time monitoring of agricultural products in the area. © 2023 Science Press. All rights reserved.
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页码：405 / 414
页数：9
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