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| Risk of heavy metal concentration in agricultural product exceeding the safe standard: Occurrence process, forewarning and control |
| Received:January 02, 2018 |
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| KeyWord:heavy metal;agricultural product;risk occurrence process;risk relationship tree;risk probability assessment;affine coordinate system |
| Author Name | Affiliation | | GUO Shu-hai | Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
National-Local Joint Engineering Laboratory of Contaminated Soil Remediation by Bio-physicochemical Synergistic Process, Shenyang 110016, China | | WU Bo | Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
National-Local Joint Engineering Laboratory of Contaminated Soil Remediation by Bio-physicochemical Synergistic Process, Shenyang 110016, China | | ZHANG Ling-yan | Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
National-Local Joint Engineering Laboratory of Contaminated Soil Remediation by Bio-physicochemical Synergistic Process, Shenyang 110016, China | | CHEN Neng-chang | Guangdong Institute of Eco-environment and Soil Sciences, Guangzhou 510650, China |
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| Abstract: |
| In this paper, taking the heavy metal in the soil as risk source and agricultural product as risk receptor, risk of heavy metal concentration in agricultural product exceeding the safe standard was analyzed in aspect of risk occurrence process, risk probability prediction, risk control and suitability assessment. Firstly, through four-quadrant zoning based on quality standards, the nonlinear response relationship between risk source and risk receptor was analyzed. Secondly, by analysis of the risk occurrence process of cadmium content in the agriculture product exceeding the safe standard, the risk occurrence relationship tree was drawn according to the transfer and accumulation of cadmium in the soil-crop system, and the risk occurrence process and major influence factors were clarified. Thirdly, with the classification and probability statistics based Bayes theory, a forewarning method for risk assessment of cadmium content in the agriculture product exceeding the safe standard was proposed. Finally, a "rectangular-generalized affine" double coordinate system was established in order to assess the soil cadmium pollution and prediction result for remediation. It provides a scientific basis for risk control of cadmium content in agricultural product exceeding the safe standard. |
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