PFAS 在农业生产系统和食品系统中带来的问题.pdf

1、Edward T.SchaferAgricultural Research CenterProblems Posed by PFAS in Ag SystemsDavid J.SmithUSDAARSFargo,NDEdward T.SchaferAgricultural Research CenterMission:To investigate the fate of chemicals in food animals and food animal systems Perfluoroalkyl substances(PFAS)Polychlorinated Dioxins/Furans M

2、icroplastics Chlorate/Chlorine dioxide Veterinary Drugs/Feed Additives Hemp CannabinoidsFood Animal Metabolism Research UnitPhotos courtesyof USDA ARSNP108 Edward T.SchaferAgricultural Research CenterWhat are PFAS?Per-and Polyfluoroalkyl Substance(s)CnF2n+1RR=-CO2-Carboxylates-SO3-Sulfonates-SO2NH2S

3、ulfonamides-SO2N(R)H Substituted Sulfonamides-CH2CH2OH Fluorotelomer alcohols“PFOA”Edward T.SchaferAgricultural Research CenterMueller and Yingling,Interstate Technology Regulatory Council,2017 Classes of PFAS 3,000 PFASexistEdward T.SchaferAgricultural Research CenterDevelopment and Uses of PFAS Ty

4、peDecade1930s1940s1950s1960s1970s1980s1990s2000sPTFE(Teflon)*InventedNon-stickcoatingsWaterprooffabricsPFOS(8c)InitialProductionFirefightingfoamUse and Productionphase-outPFOA(8C)InitialProductionProtectiveCoatingsPFNA(9C)Initial ProductionArchitecturalResinsFluoro-telomersInitialProductionFirefight

5、ingfoamsMueller and Yingling,Interstate Technology Regulatory Council,2017*polytetrafluoroethyleneClothing,paper food wraps,carpets,leather,photo emulsifiers,hydraulic fluids,floor polishes,agrochemical formulations,etc.Edward T.SchaferAgricultural Research CenterProblem 1:Documented PFAS Contaminat

6、ion 100,000 ppt(100 ppb)Industrial Facilities Air bases 1,000 10 to 1,000 ppt(1 ppb)Biosolids Surface and ground waters 0-10 ppt Environmentalhttps:/pfas-exchange.org/connecting-communities/1 ppt=1 second in 32,000 yearsEdward T.SchaferAgricultural Research CenterProblem 1:Probable Contaminationhttp