Health risk assessment of heavy metal pollution in a soil-rice system: a case study in the Jin-Qu Basin of China

Scientific Reports - Tập 10 Số 1
Bin Guo1, Chunlai Hong1, Wenbin Tong2, Mingxing Xu3, Chunlei Huang3, Hanqin Yin3, Yicheng Lin1, Qinglin Fu1
1Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
2Qujiang District Agricultural and Rural Burea, Quzhou, 324022, China
3Technological Innovation Center for Arable Land Assessment and Restoration of Ministry of Natural Resources, Hangzhou, 311203, China

Tóm tắt

Abstract

A regional field survey of a total of 109 pairs of soil and rice samples was conducted to evaluate the health risks posed by heavy metals in the Jin-Qu Basin, China. The studied soils are characterized by acid (pH in mean level of 5.5), carbon rich (soil organic matter in mean of 33.6 g kg−1) and mainly contaminated by Cd (42.2% samples exceeded the standard value of 0.3 mg kg−1 (GB15618-2018)). The spatial distributions of Cd, Pb and Zn exhibited similar geographic trends. 34% and 30% of the rice samples containing Cd and Pb exceeded the threshold value of 0.2 mg kg−1 (GB2762-2017), respectively. The risk estimation of dietary intake had a target hazard quotient value of Cd of 0.918 and a hazard index value for rice consumption of 2.141. Totally, Cd and Pb were found to be the main components contributing to the potential health risks posed by non-carcinogenic effects for local inhabitants.

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