PFASが近隣家庭の室内に拡散していることを確認（PFAS From Fluorochemical Plant Found in Dust of Nearby Homes）

2025-03-31 ノースカロライナ州立大学 (NC State)

＜関連情報＞

• https://news.ncsu.edu/2025/03/31/pfas-from-fluorochemical-plant-found-in-dust-of-nearby-homes/
• https://pubs.acs.org/doi/10.1021/acs.est.4c07043

室内塵中のパーフルオロアルキルエーテル酸およびポリフルオロアルキルエーテル酸（PFEA）濃度はフッ素化学製造施設に近い家庭で高い Per- and Polyfluoroalkyl Ether Acid (PFEA) Concentrations in Indoor Dust are Higher in Homes Closer to a Fluorochemical Manufacturing Facility

Susie Proctor,Jane A. Hoppin,Sharon Zhang,Heather M. Stapleton,Detlef R.U. Knappe,and Nadine Kotlarz
Environmental Science & Technology  Published: March 31, 2025
DOI:https://doi.org/10.1021/acs.est.4c07043

Abstract

Concentrations of 48 per- and polyfluoroalkyl substances (PFAS) were measured in settled dust samples from 65 homes of GenX Exposure Study participants residing near a fluorochemical manufacturing facility in North Carolina. Eight PFAS [perfluoro(3,5-dioxahexanoic) acid (aka PFO2HxA), perfluoro-2-(perfluoromethoxy)propanoic acid (PMPA), perfluoro-2-ethoxypropanoic acid (PEPA), 6:2 fluorotelomer phosphate diester (6:2 diPAP), 6:2/8:2 fluorotelomer phosphate diester (6:2/8:2 diPAP), perfluoropropanoic acid (PFPrA), perfluorodecanesulfonic acid (PFDS), and 2-(N-ethyl-perfluorooctanesulfonamido)acetic acid (N-EtFOSAA)] were detected in >90% of the dust samples. Dust concentrations of six per- and polyfluoroalkyl ether acids (PFEAs) produced at the facility (PEPA, PMPA, perfluoro-2-methoxyacetic acid (PFMOAA), PFO2HxA, hexafluoropropylene oxide dimer acid (HFPO–DA aka GenX), and ethanesulfonic acid, 2-[1-[difluoro(1,2,2,2-tetrafluoroethoxy)methyl]-1,2,2,2- tetrafluoroethoxy]-1,1,2,2-tetrafluoro- (Nafion byproduct 2) were significantly negatively associated with home distance from the facility. Homes closer to the facility had higher summed mass concentrations of 12 targeted PFEAs (∑₁₂PFEAs) but not higher ∑₄₈PFAS. Trifluoroacetic acid (TFA), an ultrashort chain PFAS, and three diPAPs (8:2/6:2 diPAP, 6:2 diPAP, and 8:2 diPAP) were the major contributors to ∑₄₈PFAS, and these compounds did not show relationships with distance. Based on our previous findings associating PFEAs in well water and human serum, our current findings indicate dust could be an important PFAS exposure source.