Occurrence, distribution, and risk assessment of organophosphate esters in urban street dust in the central province of Henan, China.
Environ Sci Pollut Res Int
; 26(27): 27862-27871, 2019 Sep.
Article
em En
| MEDLINE
| ID: mdl-31342355
ABSTRACT
In this study, nine OPEs were measured in 60 street dust samples collected from the central province of Henan, China. The total concentrations of OPEs (∑9OPEs) in street dust range from 2.77 to 505 µg/kg (median 59.3 µg/kg). Chlorinated OPEs are dominant in street dust with median concentration of 33.5 µg/kg, followed by aryl OPEs (median 9.05 µg/kg), and alkyl OPEs (median 6.19 µg/kg). No significant correlations are found between ∑9OPEs and parameters, such as population (p = 0.931), population density (p = 0.602), car ownership (p = 0.618), and gross domestic product (p = 0.863). Principal component analysis (PCA) result reveals that road traffic could be a major source of OPEs in street dust because of their extensive use in various vehicles. The total average (median) and high-level exposure (95th percentile) of OPEs are 1.01 × 10-2, 7.17 × 10-2 ng/kg bw/d for adults and 6.03 × 10-2, 0.43 ng/kg bw/d for children, respectively. Hazard quotient (HQ) values are 5-6 orders of magnitude lower than the acceptable risk level (HQ < 0.1), indicating there is still a low risk to local residents at current levels.
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MEDLINE
Assunto principal:
Organofosfatos
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Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article