数字农科院2.0

Distribution, uptake, and daily exposure of per- and polyfluoroalkyl substances in a paddy field: A growth cycle study

文献类型： 外文期刊

作者： Bowen Li;Hongping Wang;Peiwen Yu;Pan Zou;Dongfei Tan;Fen Jin

作者机构：

关键词： Bioaccumulation;Paddy fields;Per- and polyfluoroalkyl substances;Risk assessment;Tissue distribution

期刊名称： Journal of Hazardous Materials

ISSN： 0304-3894

年卷期： 2025 年 492 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Rice, a crucial agricultural commodity, is potentially susceptible to contamination by persistent organic pollutants throughout its entire growth cycle in the field. Per- and polyfluoroalkyl substances (PFASs) have attracted great scientific attention due to their environmental persistence, bioaccumulation potentials, and toxicity. However, the occurrence and behavior of PFASs in the paddy ecosystem have not been confirmed. This study explored the uptake, accumulation, and potential risks of PFASs in the irrigation water, soils and paddy tissues from a typical paddy system at the main stages of rice growth. The total PFAS concentrations in irrigation water and soils were in the range of 62.9 −85.5 ng/L and 45.7 −75.4 ng/g dw. The concentrations of PFASs in paddy tissues followed the order of root>stem>leaf>grain. A minor decrease in PFAS concentrations in paddy tissues with growth time may be attributed to biotransformation and growth dilution. PFAS distribution in soils, irrigation water, and different paddy tissues also showed different patterns with the growing time of paddy. ΣPFCAs and ΣPFSAs were the most prevalent PFASs in all samples, which constituted 65.0 −96.3 % of the total PFASs. In addition, the transfer factor (TF) values from root to stem/leaf/grain decreased as Log KOW increased (Log KOW< 5). Significant correlations between the concentrations and protein contents in paddy grains were observed for most long-chain PFASs. Risk assessments have suggested that the current levels do not pose a health risk to humans, but PFAS alternatives cannot be neglected for food safety and environmental impacts.

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