Potential toxic elements (PTEs) in rhizosphere soils and crops under a black shale high geological background: Pollution characteristics, distribution and risk assessment

作者：Luyuan Chen, Bozhi Ren, Xinping Deng, Yin Wei, Qing Xie, Zhaoqi Cai, Hao Zou · 发表于：Ecological Indicators · 年份：2024 · DOI：10.1016/j.ecolind.2024.112236 · 被引用次数：28 · 研究领域：Heavy metals in environment、Geochemistry and Geologic Mapping、Radioactivity and Radon Measurements

• The rhizosphere soil and crops in the Loushao Basin are rich in potential toxic heavy metal elements. • A comprehensive study on the pollution characteristics of non rhizosphere soil rhizosphere soil and crops. • Evaluate pollution through distribution autocorrelation, characteristics, and ecological risk indicators of pollution. • Health risk assessment by comparing the likelihood of carcinogenesis between adults and children. The LouShao Basin in Hunan Province is covered with two sets of black rock series containing various potential toxic heavy metal elements. The rock series are rich in various potential toxic heavy metal elements, and the weathered black shale is the main formation of local farmland soil, making it a typical area with high geological background in China. The purpose of this study is to assess the regional ecological and health risks by studying the correlation between the content of heavy metal elements enriched in rhizosphere soil, non-rhizosphere soil, and crops, and the concentration of heavy metal elements in the main source, black shale rocks. The results show that the elements in the black shale far exceed the world average of rock, severely affecting soil element concentrations. Se element is the most severely polluted in rhizosphere soil, exceeding the background value by 7 times. The concentration of heavy metals between rock-non-rhizosphere soil-rhizosphere soil-crops decreases linearly. The distribution of pollution has strong spatial autoc...