Risk Identification of Heavy Metals in Agricultural Soils from a Typically High Cd Geological Background Area in Upper Reaches of the Yangtze River
文献类型： 外文期刊
作者： Tian, Xiaosong 1 ; Chai, Guanqun 3 ; Xie, Qing 4 ; Fan, Min 2 ; Qin, Song 3 ; Fan, Chengwu 3 ; Gong, Yalong 2 ; Liu, Jinhu 2 ; Li, Guanghui 2 ;
作者机构： 1.Chongqing Vocat Inst Engn, Chongqing 402260, Peoples R China
2.Chongqing Engn Res Ctr Soil Contaminat Control &, Chongqing 400067, Peoples R China
3.Guizhou Acad Agr Sci, Inst Soil & Fertilizer, Guiyang 550006, Peoples R China
4.Southwest Univ, Coll Resources & Environm, Interdisciplinary Res Ctr Agr Green Dev Yangtze R, Chongqing 400715, Peoples R China
关键词： Potential ecological risk; Health risk; Heavy metals; Priority pollutants; Agricultural soils
期刊名称：BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY （ 影响因子：2.807； 五年影响因子：2.616 ）
ISSN： 0007-4861
年卷期：
页码：
收录情况： SCI
摘要： 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 x 10(-4)) and children (2.2 x 10(-4)) surpassed the reference value (1.0 x 10(-4)), indicating that the risks were unacceptable. Contributions of HMs to TCR generally decreased in the order of Cr approximate to 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.
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