Prediction and risk assessment of five heavy metals in maize and peanut: A case study of Guangxi,China |
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| Affiliation: | 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, PR China;2. School of Science, China University of Geosciences, Beijing 100083, PR China;3. Key Laboratory of Ecological Geochemistry, Ministry of Natural Resources, Beijing 100037, PR China;4. Nanjing University, Nanjing 210023, PR China;5. Geology Team No.4 of Guangxi Zhuang Autonomic Region, Nanning 530031, PR China;6. Guangxi Geophysical Investigation Institute, Liuzhou 545005, PR China;8. Guangxi Bureau of Geology & Mineral Prospecting & Exploitation, Nanning 530023, PR China;1. School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, PR China;2. School of Science, China University of Geosciences, Beijing, 100083, PR China;3. Key Laboratory of Ecological Geochemistry, Ministry of Natural Resources, Beijing, 100037, PR China;4. Nanjing University, Nanjing, 210023, PR China;5. Guangxi Bureau of Geology & Mineral Prospecting & Exploitation, Nanning, 530023, PR China;1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;2. Shenyang Water Group Co., Ltd., Shenyang 110005, China;1. State University of Santa Cruz, Department of Biological Sciences, Rodovia Jorge Amado, km 16, 45662-900 Ilhéus, BA, Brazil;2. USDA-ARS-Beltsville Agricultural Research Center, Beltsville, MD, USA;1. Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210093, China;2. School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China;3. Guangxi Bureau of Geology & Mineral Prospecting & Exploitation, Nanning, 530023, China;4. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China;1. College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127 (China);2. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);3. Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095 (China) |
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| Abstract: | ![]()
To assess the contamination levels and health risk of cadmium (Cd), copper (Cu), mercury (Hg), lead (Pb), and zinc (Zn) to human beings, the concentrations of these heavy metals in soil were surveyed and the concentrations in maize and peanut grains were estimated by models. The geo-accumulation index (I geo) was calculated, and chronic daily intake (CDI), hazard quotient (HQ) and hazard index (HI) were estimated. Results indicated that the concentrations of Cd, Cu, Hg, Pb, and Zn in the soil samples exceeded the limit set by authorities in China. However, the concentrations in maize and peanut grains were rarely higher than the allowable concentrations suggested by the Ministry of Health of China (MHC). In accordance with geo-accumulation, these heavy metals in soil samples were polluted to different extents. Prediction models were developed to effectively assess the health risk of using TOC, Mn, pH, and CaO to human beings. Therefore, the concentrations of these heavy metals in the grains could be decreased by changing their levels in soil. The CDI, HQ, and HI were estimated by estimating concentrations of Cd, Cu, Pb, and Zn in maize grains, indicating that these metals exhibited a slight health risk to adult residents. |
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| Keywords: | Heavy metals Maize and peanut Prediction models Risk assessment |
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