Investigation and dietary exposure risk assessments of 3 PFASs and 2 Cl-PFESA in fresh vegetables planted in the vicinity of typical fluorine chemical industry parks located in Guangdong province
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1.School of Public Health, Southern Medical University, Food Safety and Health Research Center, Guangdong-Hong Kong-Macao Joint Laboratory for Pollutant Exposure and Health, Guangdong Key Laboratory of Tropical Disease Research, Guangdong Guangzhou 510515, China;2.China National Center for Food Safety Risk Assessment, NHC Key Laboratory of Food Safety Risk Assessment, Beijing 100022, China;3.School of Public Health, Southern Medical University, Health Inspection Center, Guangdong Guangzhou 510515, China;4.Forensic School of Southern Medical University, Forensic Identification Center, Guangdong Guangzhou 510515, China

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R155

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    Abstract:

    Objective To investigate the contamination status and dietary exposure risk of 3 perfluorinated substances and 2 chlorine substituted perfluoroalkyl ether sulfonate acids in fresh vegetables planted in the vicinity of typical fluorine chemical industry parks located in Guangdong province.Methods Ninety six vegetables were collected from the vicinity of 3 typical fluorine chemical industry parks and local markets in 2019. The concentrations of 3 perfluorinated substances [perfluorooctane sulfonate acid (PFOS), perfluorooctanoic acid (PFOA), perfluorohexanesulfonic acid (PFHxS)] and 2 chlorine substituted perfluoroalkyl ether sulfonate acids (6:2 Cl-PFESA and 8:2 Cl-PFESA) in fresh vegetables were detected using isotope dilution method by UPLC-QqQ-MS, and the point estimate was employed to estimate the levels of dietary exposure from fresh vegetables.Results PFOS and PFOA were detected in all samples, while chlorine substituted perfluoroalkyl ether sulfonates were detected in 2 leafy vegetable samples. The sum of average concentration of PFASs and Cl-PFESAs in vegetable samples was 0.792 ng/g fw (fresh weight, fw), and it was two-fold higher compared the samples around the fluorine chemical industrial with the samples from local markets. The average concentration of 5 chemicals (1.11 ng/g fw) was the highest in leafy vegetables. The results of dietary exposure assessment indicated that the exposure levels of 3 perfluorinated compounds by consumption of fresh vegetables which planted surrounding fluorine chemical industry parks were 0.185-2.35 ng/kg·BW. The hazard indexes (HI) of PFOS and PFOA were greater than 1. The exposure level of chlorine substituted perfluoroalkyl ether sulfonate acids were lower.Conclusion The exposures of PFOS and PFOA of local general population exceeded the established thresholds for the adult residents. The risks of 2 chlorine substituted perfluoroalkyl ether sulfonate acids exposure from vegetables were low, which still need to be concerned.

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LIN Jun, CHEN Huiming, BAO Huihui, CAO Hongjie, WANG Yuxin, PAN Jialiang, LUO Qizhi, ZHANG Lei, WU Weiliang, YANG Xingfen, LIU Zhaoping, WU Yongning. Investigation and dietary exposure risk assessments of 3 PFASs and 2 Cl-PFESA in fresh vegetables planted in the vicinity of typical fluorine chemical industry parks located in Guangdong province[J].中国食品卫生杂志,2022,34(5):982-989.

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History
  • Received:January 27,2022
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  • Online: December 01,2022
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