Fluorine mass balance analysis and per- and polyfluoroalkyl substances in the atmosphere

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Sachi Taniyasu
  • Eriko Yamazaki
  • Paul K.S. Lam
  • Heesoo Eun
  • Nobuyoshi Yamashita

Detail(s)

Original languageEnglish
Article number129025
Journal / PublicationJournal of Hazardous Materials
Volume435
Online published28 Apr 2022
Publication statusPublished - 5 Aug 2022

Abstract

Given that only a small number of per- and polyfluoroalkyl substances (PFAS) are routinely monitored, levels of PFAS in the atmosphere may be underestimated. A protocol including analyses of target PFAS (n = 50), water-soluble fluoride, and total fluorine has been proposed and applied to atmospheric samples. The whole method recovery (including extraction recovery and sampling efficiency) of 90–110% were obtained for the majority of compounds (48/50) with low deviations between replicates (< 20%). Fluorotelomer alcohols were the most prevalent PFAS in the indoor air, while the outdoor air was dominated by the ultrashort-chain ionic PFAS (e.g., trifluoroacetic acid and perfluoropropanoic acid). Concentrations of organofluorine (OF) compounds calculated from the fluorine mass balance ranged from 1.74 ng F/m3 to 14.3 ng F/m3 and from 52.0 ng F/m3 to 1100 ng F/m3 in the particulate and gaseous phases, respectively, whereas only a minor proportion (around 1%) could be explained by target PFAS. In indoor air, OF compounds were observed in relatively high levels and with a shift to the fine particles (PM<1). Our results reveal a large proportion of unidentified OF signatures in the atmosphere and suggest the need to use multiple approaches to improve our understanding of airborne fluorinated substances.

Research Area(s)

  • Gas-particle partitioning, Organofluorine, Per- and polyfluoroalkyl substances, Size-segregated distribution

Citation Format(s)

Fluorine mass balance analysis and per- and polyfluoroalkyl substances in the atmosphere. / Lin, Huiju; Taniyasu, Sachi; Yamazaki, Eriko; Wu, Rongben; Lam, Paul K.S.; Eun, Heesoo; Yamashita, Nobuyoshi.

In: Journal of Hazardous Materials, Vol. 435, 129025, 05.08.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review