Particle Size-Specific Distributions and Preliminary Exposure Assessments of Organophosphate Flame Retardants in Office Air Particulate Matter
Abstract
In this study, the concentrations, size-specific distributions, and preliminary exposure assessments of 10 organophosphate flame retardants (OPFRs) were investigated in suspended particulate matter collected from offices. OPFRs were detected in a range of 5.00-147.77 ng/m(3). Tri(chloropropyl) phosphate (TCPP) was the most abundant analog followed by tri(2-chloroethyl) phosphate (TCEP) and triphenyl phosphate (TPhP). Chlorinated OPFRs (TCPP, TCEP, and tris(1,3-dichloroisopropyl) phosphate (TDCPP)) contributed to about 77% of the total OPFRs. Size-specific distributions revealed that TCEP, tri-n-propyl phosphate (TnPP), TCPP, and tri-n-butyl phosphate (TnBP) shared a similar distribution pattern with a peak in the fraction 4.7-5.8 μm. A peak was also found in the distributions of tricresyl phosphate (TCrP), 2-ethylhexyl diphenyl phosphate (EHDPP), and tri(2-ethylhexyl) phosphate (TEHP) but in different fractions. A bimodal distribution was observed for TDCPP, TPhP, and tributoxyethyl phosphate (TBEP). The results of mass median aerodynamic diameter (MMAD) indicated that TDCPP, TCrP, and TEHP were mainly located on ultrafine particles (≤1 μm), while TnPP, TBEP, and EHDPP mainly on fine particles (≤2.5 μm). Furthermore, MMADs of OPFRs were found to be positively correlated with their vapor pressures (Vp) (p < 0.01), indicating that OPFR analogs with low Vp were inclined to adsorb on small size particles. Preliminary exposure assessments suggested a low risk of exposure to OPFRs for people working in such offices, and inhaled OPFRs would mainly deposit in the head region of the respiratory tract.
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Previous studies on organophosphate flame retardants found that ignoring particle-size characteristics in exposure assessment could overestimate the exposure level.
“Previous studies on organophosphate flame retardants have found that ignoring particle-size characteristics in exposure assessment could overestimate the exposure level.”
From Non-Target and Suspect Screening of Per- and Polyfluoroalkyl Substances in Airborne Particulate Matter in China (2018) · cites this paper as [40]
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Yu, N., Guo, H., Yang, J., Jin, L., Wang, X., Shi, W., Zhang, X., Yu, H., & Wei, S. (2018) · Environmental Science & Technology · doi:10.1021/acs.est.8b02492 · Cited by 200 · see citing works
- Authors
- Yang, F., Ding, J., Huang, W., Xie, W., & Liu, W.
- Affiliations
- Zhejiang University (CN)
- Corresponding author
- Liu, Weiping
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-12-10
- Volume
- 48
- Issue
- 1
- Pages
- 63-70
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W1980709324
- Cited by
- 228
- References
- 40
- Citations by year
- 2026: 10 · 2025: 15 · 2024: 14 · 2023: 12 · 2022: 15 · 2021: 18 · 2020: 26 · 2019: 38 · 2018: 22 · 2017: 20 · 2016: 19 · 2015: 14 · 2014: 4
- FWCI
- 9.05
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Environmental Science & Technology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Indoor Air Quality and Microbial Exposure
- Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
- Keywords
- organophosphate flame retardants, triphenyl phosphate, tributyl phosphate, tricresyl phosphate, vapor pressure, ultrafine particles, mass median aerodynamic diameter, exposure assessment, indoor air pollution
- MeSH terms
- Adult, Air Pollutants, Environmental Exposure, Flame Retardants, Humans, Particle Size, Organophosphates, Air Pollution, Indoor, Workplace, Risk Assessment, Particulate Matter
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