Ding Zhuhong, Hu Xin
School of Environment, Nanjing University of Technology, Nanjing, 211816, People's Republic of China,
Environ Geochem Health. 2014 Jun;36(3):399-408. doi: 10.1007/s10653-013-9568-1. Epub 2013 Sep 12.
In order to investigate the ecological and human health risks of metal(loid)s (Cu, Pb, Zn, Ni, Cd, Mn, Cr, and As) in peri-urban soils, 43 surface soil samples were collected from the peri-urban area around Nanjing, a megacity in China. The average contents were 1.19, 67.8, 37.6, 105, 167, 44.6, 722, and 50.8 mg kg(-1) for Cd, Cr, Ni, Pb, Zn, Cu, Mn, and As, respectively. A significant positive correlation was found between Cu, Pb, Zn, Cd, Mn, and As (p < 0.01), and Cr had a significant positive correlation with Ni (p < 0.01). Geoaccumulation indices indicate the presence of Cd and As contamination in all of the peri-urban soil samples. Potential ecological risk indices show that the metal(loid)s in the soil could result in higher ecological risks. Cd is the main contributor to the risk, followed by As. The levels of Cu, Pb, Zn, Cd, Mn, and As in stomach and intestinal phases show a positive linear correlation with their total contents. Mn, Zn, Ni, Cd, and Pb in stomach phase showed higher bioaccessibility, while in intestinal phase, Cu, Cr, and As had the higher bioaccessibility. The carcinogenic risk in children and adults posed by As, Pb, and Cr via ingestion was deemed acceptable. The non-carcinogenic risks posed by these metal(loid)s via ingestion to children are higher than to adults and mainly result from As.
为了调查城郊土壤中金属（类金属）（铜、铅、锌、镍、镉、锰、铬和砷）对生态和人类健康的风险，从中国特大城市南京周边的城郊地区采集了43个表层土壤样本。镉、铬、镍、铅、锌、铜、锰和砷的平均含量分别为1.19、67.8、37.6、105、167、44.6、722和50.8 mg kg⁻¹。铜、铅、锌、镉、锰和砷之间存在显著正相关（p < 0.01），铬与镍存在显著正相关（p < 0.01）。地累积指数表明所有城郊土壤样本中均存在镉和砷污染。潜在生态风险指数表明土壤中的金属（类金属）可能导致较高的生态风险。镉是风险的主要贡献者，其次是砷。胃相和肠相中铜、铅、锌、镉、锰和砷的含量与其总含量呈正线性相关。胃相中锰、锌、镍、镉和铅的生物可及性较高，而在肠相中，铜、铬和砷的生物可及性较高。砷、铅和铬经口摄入对儿童和成人造成的致癌风险被认为是可接受的。这些金属（类金属）经口摄入对儿童造成的非致癌风险高于成人，且主要由砷导致。
