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| Metal content characteristics and health risk assessment of peanut-soil system in typical potential selenium-rich planting areas of Liancheng County，Fujian Province |
| Received:May 26, 2024 |
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| KeyWord:peanut;soil;selenium;metal elements;health risks assessment |
| Author Name | Affiliation | | HUANG Biao | Fujian Key Laboratory of Agro-Products Quality & Safety/Institute of Quality Standards & Testing Technology for Agro-Products, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
Laboratory of Quality and Safety Risk Assessment for Agro-products, Ministry of Agriculture and Rural Affairs(Fuzhou), Fuzhou 350003, China | | LU Feifei | Fujian Key Laboratory of Agro-Products Quality & Safety/Institute of Quality Standards & Testing Technology for Agro-Products, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
Laboratory of Quality and Safety Risk Assessment for Agro-products, Ministry of Agriculture and Rural Affairs(Fuzhou), Fuzhou 350003, China | | LI Wei | Fujian Key Laboratory of Agro-Products Quality & Safety/Institute of Quality Standards & Testing Technology for Agro-Products, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
Laboratory of Quality and Safety Risk Assessment for Agro-products, Ministry of Agriculture and Rural Affairs(Fuzhou), Fuzhou 350003, China | | LIN Yonghui | Fujian Key Laboratory of Agro-Products Quality & Safety/Institute of Quality Standards & Testing Technology for Agro-Products, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
Laboratory of Quality and Safety Risk Assessment for Agro-products, Ministry of Agriculture and Rural Affairs(Fuzhou), Fuzhou 350003, China | | WU Jianyan | Fujian Key Laboratory of Agro-Products Quality & Safety/Institute of Quality Standards & Testing Technology for Agro-Products, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
Laboratory of Quality and Safety Risk Assessment for Agro-products, Ministry of Agriculture and Rural Affairs(Fuzhou), Fuzhou 350003, China |
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| Abstract: |
| To investigate the selenium and metal element composition within the soil-peanut system in a typical potential selenium-rich planting area in Liancheng County, Fujian Province, and to assess the health risks associated with heavy metals in peanuts, 32 garden soil samples and their corresponding 32 peanut samples were collected. The concentrations of Se and 11 other metal elements, including Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Pb, Zn were analyzed. The single pollution index and Nemerow index were employed to assess soil contamination in the planting fields, and correlation analysis was conducted to examine the enrichment patterns of metal elements in peanuts. Additionally, the dietary risks associated with four heavy metals were evaluated using the target hazard quotient（THQ）and total target hazard quotient（TTHQ）. The Se concentration in the planting soil ranged from 0.14 mg·kg-1 to 0.63 mg·kg-1, with an average concentration of 0.25 mg·kg-1. In peanuts, Se content varied between 0.006 mg·kg-1 and 0.079 mg·kg-1, with an average of 0.012 mg·kg-1. The average Nemerow index was 0.61, suggesting that the soil across the study area was generally at a clean level. However, attention should be given to Cd contamination, as 56.3% of the samples exceeded the alert threshold for Cd pollution. The contents of elements in plant soil were in the order of K>Fe>Na>Ca>Mg>Mn>Cr>Zn>Pb>Cu>Se>Cd, and in peanut were in the order of Mg>K>Ca>Mn>Zn>Fe> Na>Cr>Cu>Pb>Cd>Se. The average concentration coefficients of peanuts for the various elements displayed significant variation, ranked as follows：Mg>Zn>Mn>Cd>K>Ca>Se>Cu>Cr>Pb>Na>Fe.The results indicated that peanuts exhibited the highest accumulation capacity for Mg and Zn, but the lowest for Na and Fe. The enrichment factors for Mg and Zn were both greater than 1, with values of 2.838 and 1.009, respectively. Cr had the highest mean concentration compared to other metal elements, yet all heavy metal concentrations in the peanuts remained within the permissible limits set by national standards. Correlation analysis revealed that Se content in peanuts had a positive correlation with Cd, Cu, Na, and Zn, while it exhibited a strong negative correlation with Pb（P<0.01）. The ranking of health risks from the intake of four heavy metals was Cr>Cd>Pb>Cu, with Cr contributing the most to health risks in the selenium-rich soil planting area. Overall, both the THQ and TTHQ values were below 1, indicating no significant health risks to humans from the collected peanut samples in the study area. |
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