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Size-dependent atmospheric deposition and inhalation exposure of particle-bound organophosphate flame retardants
Ist Teil von
Journal of hazardous materials, 2016-01, Vol.301, p.504-511
Ort / Verlag
Netherlands: Elsevier B.V
Erscheinungsjahr
2016
Link zum Volltext
Quelle
MEDLINE
Beschreibungen/Notizen
[Display omitted]
•Particle size distributions of OPFRs were studied in outdoor settings.•The most abundant OPFR at both study sites was TBEP.•The abundances of OPFRs in coarse and fine particles were roughly equal.•Dry and wet deposition fluxes of particle-bound OPFRs were size-dependent.•Inhalation exposure risk to particle-bound OPFRs at both sites was low.
Atmospheric size-fractionated particles were collected at different heights in an e-waste recycling zone (QY) and urban Guangzhou (GZ), China and analyzed for organophosphate flame retardants (OPFRs). The total air concentrations of eight OPFRs were 130±130 and 138±127ngm−3 in QY and GZ, respectively. Compositional profiles of chlorinated OPFRs were different between QY and GZ, but the size distribution patterns of all OPFRs were not significantly different at different heights. Estimated atmospheric deposition fluxes of OPFRs were 51±67 and 55±13μgm−2d−1 in QY and GZ, respectively, and the coarse particles (Dp>1.8μm) dominated both the dry and wet deposition fluxes. Moreover, not all particle-bound OPFRs were inhalable and deposited in the human respiratory tract. The calculated inhalation doses of OPFRs were much lower than the reference doses, suggesting that potential health risk due to inhalation exposure to particle-bound OPFRs in the e-waste recycling zone and urban site was low.