Occurrence and risk of human exposure to organophosphate flame retardants in indoor air and dust in Hanoi, Vietnam

The presence and distribution of thirteen organophosphate flame retardants (OPFRs) were investigated in indoor air and dust samples collected in Hanoi, Vietnam. The total OPFRs (ƩOPFRs) concentrations in indoor air and dust samples were 42.3–358 ng m−3 (median 101 ng m−3) and 1290–17,500 ng g−1 (med...

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Published in:Chemosphere (Oxford) 2023-07, Vol.328, p.138597-138597, Article 138597
Main Authors: Hoang, Minh Tue Thi, Le, Giang Truong, Kiwao, Kadokami, Duong, Hanh Thi, Nguyen, Trung Quang, Phan, Thang Quang, Bui, Minh Quang, Truong, Dung Anh, Trinh, Ha Thu
Format: Article
Language:English
Subjects:
Adult
Air Pollution, Indoor - analysis
Dust - analysis
Environmental Exposure - analysis
Environmental Monitoring
Flame Retardants - analysis
Human exposure
Humans
Indoor air
Indoor dust
Organophosphate flame retardants
Organophosphates - analysis
Risk assessment
Vietnam
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Summary:The presence and distribution of thirteen organophosphate flame retardants (OPFRs) were investigated in indoor air and dust samples collected in Hanoi, Vietnam. The total OPFRs (ƩOPFRs) concentrations in indoor air and dust samples were 42.3–358 ng m−3 (median 101 ng m−3) and 1290–17,500 ng g−1 (median 7580 ng g−1), respectively. The profile of OPFRs in both indoor air and dust indicated that tris(1-chloro-2-propyl) phosphate (TCIPP) was the most dominant compound with a median concentration of 75.3 ng m−3 and 3620 ng g−1, contributing 75.2% and 46.1% to ƩOPFRs concentrations in indoor air and dust, respectively, followed by tris(2-butoxyethyl) phosphate (TBOEP), with a median concentration of 16.3 ng m−3 and 2500 ng g−1, contributing 14.1% and 33.6% to ƩOPFRs concentrations in indoor air and dust, respectively. The levels of OPFRs in the indoor air samples and corresponding indoor dust samples showed a strong positive correlation. The total estimated daily intakes (EDItotal) of ƩOPFRs (via air inhalation, dust ingestion, and dermal absorption) for adults and toddlers under the median and high exposure scenarios were 36.7 and 160 ng kg−1 d−1, and 266 and 1270 ng kg−1 d−1, respectively. Among the investigated exposure pathways, dermal absorption was a primary exposure pathway to OPFRs for both toddlers and adults. The hazard quotients (HQ) ranged from 5.31 × 10−8 to 6.47 × 10−2 (
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2023.138597