Accumulation, ecological-health risks assessment, and source apportionment of heavy metals in paddy soils: A case study in Hanzhong, Shaanxi, China

Environmental Pollution
Ran XiaoZeng-Qiang Zhang

Abstract

Contamination of agricultural soil by heavy metals has become a global issue concerning food security and human health risk. In this study, a soil investigation was conducted to evaluate metals accumulation, potential ecological and health risks as well as to identify sources of metals in paddy soils in Hanzhong City, which is located in a sedimentary basin. Ninety-two (92) surface soil samples (bulk soil) and their corresponding rice samples, 21 irrigation water samples, and 18 fertilizer samples were collected from two typical counties and quantified for the heavy metals (i.e., As, Cd, Cu, Hg, Pb, and Zn) concentrations. The results showed that As, Cd, and Zn were the main contaminants in soils in the studied area. Additionally, elevated Hg content in soils might also pose risks to the local ecosystem. Cadmium and As demonstrated high mobility, and their average contents in rice grains were slightly higher than the permissible threshold (0.20 mg kg-1). Moreover, Pb, As, and Cd intake via rice consumption might result in potential risks to local residents. Metal distribution revealed that pollution in the studied area is non-homogeneous, and agricultural activities (As, Cu, and Cd), transportation emission (Cu and Pb), coal co...Continue Reading

Citations

Jun 30, 2019·International Journal of Environmental Research and Public Health·Kui CaiKangjoo Kim
Nov 1, 2020·International Journal of Phytoremediation·Xian'an YuPeter Christie
Feb 20, 2021·Ecotoxicology and Environmental Safety·Huihui WuAijun Lin
Jul 1, 2020·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Ning DiJohn T Trumble
Mar 7, 2021·International Journal of Environmental Research and Public Health·Zhao LiuHong Zhou
Mar 24, 2021·Ecotoxicology and Environmental Safety·Lei ChaiMinxia Liu
Jul 29, 2021·Journal of Hazardous Materials·Watilla Pereira CovreAntonio Rodrigues Fernandes

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