Tissue-specific distribution and bioaccumulation of perfluoroalkyl acids, isomers, alternatives, and precursors in citrus trees of contaminated fields: Implication for risk assessment

Liu, Zhaoyang; Liu, Shun; Xiao, Feng; Sweetman, Andrew J.; Cui, Qianqian; Guo, Hao; Xu, Jiayi; Luo, Ziyao; Wang, Mingxia; Zhong, Linlin; Gan, Jay; Tan, Wenfeng

doi:10.1016/j.jhazmat.2023.133184

Journal of Hazardous Materials

2024

DOI: 10.1016/j.jhazmat.2023.133184

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Tissue-specific distribution and bioaccumulation of perfluoroalkyl acids, isomers, alternatives, and precursors in citrus trees of contaminated fields: Implication for risk assessment

Zhaoyang Liu,

Shun Liu,

Feng Xiao

et al.

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Cited by 3 publications

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Bio-accumulation and health risk assessments of per- and polyfluoroalkyl substances in wheat grains

Yang,

Zhao,

Chai

et al. 2024

Environmental Pollution

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Bio-accumulation and health risk assessments of per- and polyfluoroalkyl substances in wheat grains

Yang,

Zhao,

Chai

et al. 2024

Environmental Pollution

View full text Add to dashboard Cite

Legacy and emerging per- and polyfluoroalkyl substances (PFASs) in agricultural soils affected by fluorochemical manufacturing facilities, North China: Occurrence, region-specific distribution, substitution trend and source appointment

Xing,

Wang,

Liu

et al. 2024

Journal of Hazardous Materials

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New Insights into Thermal Degradation Products of Long-Chain Per- and Polyfluoroalkyl Substances (PFAS) and Their Mineralization Enhancement Using Additives

Sun,

Alinezhad,

Altarawneh

et al. 2024

Environ. Sci. Technol.

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The products of incomplete destruction (PIDs) of perand polyfluoroalkyl substances (PFAS) represent a substantial ambiguity when employing thermal treatments to remediate PFAS-contaminated materials. In this study, we present new information on PIDs produced in both inert and oxidative environments from five long-chain PFAS, including three now regulated under the U.S. Safe Drinking Water Act, one cationic precursor compound, and one C10 PFAS. The data did not support the generation of tetrafluoromethane from any of the studied PFAS, and carbonyl fluoride was found only from potassium perfluorooctanesulfonate (K-PFOS) when heated in air in a narrow temperature range. Oxidative conditions (air) were observed to facilitate PFAS thermal degradation and accelerate the mineralization of K-PFOS. Spectroscopic data suggest that PFAS thermal degradation is initiated by the cleavage of bonds that form perfluoroalkyl radicals, leading to organofluorine PIDs (e.g., perfluoroalkenes). In air, perfluoroalkyl radicals react with oxygen to form oxygen-containing PIDs. The mineralization of PFAS was enhanced by adding solid additives, which were categorized as highly effective (e.g., granular activated carbon (GAC) and certain noble metals), moderately effective, and noneffective. Remarkably, simply by adding GAC, we achieved >90% mineralization of perfluorooctanoic acid at 300 °C and ∼1.9 atm within just 60 min without using water or solvents.

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Tissue-specific distribution and bioaccumulation of perfluoroalkyl acids, isomers, alternatives, and precursors in citrus trees of contaminated fields: Implication for risk assessment

Cited by 3 publications

References 74 publications

Bio-accumulation and health risk assessments of per- and polyfluoroalkyl substances in wheat grains

Bio-accumulation and health risk assessments of per- and polyfluoroalkyl substances in wheat grains

Legacy and emerging per- and polyfluoroalkyl substances (PFASs) in agricultural soils affected by fluorochemical manufacturing facilities, North China: Occurrence, region-specific distribution, substitution trend and source appointment

New Insights into Thermal Degradation Products of Long-Chain Per- and Polyfluoroalkyl Substances (PFAS) and Their Mineralization Enhancement Using Additives

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