Risk Identification of Heavy Metals in Agricultural Soils from a Typically High Cd Geological Background Area in Upper Reaches of the Yangtze River.

Autor: Tian, Xiaosong, Chai, Guanqun, Xie, Qing, Fan, Min, Qin, Song, Fan, Chengwu, Gong, Yalong, Liu, Jinhu, Li, Guanghui
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Zdroj: Bulletin of Environmental Contamination & Toxicology; Nov2022, Vol. 109 Issue 5, p713-718, 6p
Abstrakt: This study adopted two risk assessment models to estimate the potential risk of heavy metals (HMs) in agricultural soils from a high Cd geological background area. Results were as follows: HMs posed an extremely high potential ecological risk (PER) (PER = 2051 > 1200) ascribed to Cd contribution. The overall non-carcinogenic risk (HI) of HMs for children (HI > 1) was unacceptable. Contributions of HMs to HI generally decreased in the order of Cr > As > Pb > Cd > Ni > Cu > Zn. The total carcinogenic risk (TCR) value for adults (2.1 × 10–4) and children (2.2 × 10–4) surpassed the reference value (1.0 × 10–4), indicating that the risks were unacceptable. Contributions of HMs to TCR generally decreased in the order of Cr ≈ Ni > Cd > As > Pb. These results suggested that risk control policies should not only consider the potential ecological risk of Cd but also take into consideration of the carcinogenic and non-carcinogenic risk of Cr and Ni in a typically high Cd geological background area. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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