期刊
JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH-PART A-CURRENT ISSUES
卷 80, 期 13-15, 页码 630-640出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15287394.2017.1286931
关键词
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资金
- European Union (FEDER funds through COMPETE)
- National Funds (Fundacao para a Ciencia e Tecnologia) [UID/QUI/50006/2013, POCI-01-0145-FEDER-007265, POCI-01-0145-FEDER-006939]
- FCT/MEC
- FEDER
- Fundacao para Ciencia e Tecnologia [PTDC/DTP-SAP/1522/2012, SFRH/BPD/105100/2014, SFRH/BD/80113/2011]
- Fundação para a Ciência e a Tecnologia [PTDC/DTP-SAP/1522/2012, SFRH/BPD/105100/2014, SFRH/BD/80113/2011] Funding Source: FCT
The aim of this study was to determine levels and risks due to inhalation exposure to polycyclic aromatic hydrocarbons (PAH) in different educational settings, namely for 3- to 5-year-old and 6- to 10-year-old children. Eighteen PAH (16 priority designated by US Environmental Protection Agency (USEPA) and dibenzo[a, l] pyrene and benzo[j] fluoranthene) were simultaneously collected in indoor and outdoor air at two Portuguese preschools (PS1-PS2) and five elementary schools (ES1-ES5) from March to May 2014. Indoor concentrations at PS and ES were significantly different, with total levels (SPAHs) 0.721-15.9 ng/m(3) at PS1-PS2 and 5.03-23.6 ng/m(3) at ES1-ES5. The corresponding outdoor concentrations were, respectively, 1.22-32.7 ng/m(3) and 2.6-31.5 ng/m(3). Polycyclic aromatic hydrocarbons with 2-3 aromatic rings were predominantly emitted by indoor sources, while compounds with 4-6 aromatic rings were mainly generated by infiltration of ambient PAH pollution to indoors. Excess lifetime risks of lung cancer exceeded the World Health Organization (WHO) designated guideline of 10(-5) in both types of schools (15-42-fold at PS; 15-52-fold at ES). However, total (sum of indoor and outdoor exposure) incremental lifetime cancer risks (ILCR) were below the USEPA level of 10(-6) at all studied institutions and thus considered negligible. Finally, ILCR due to indoor exposure represented 60-75% and 70-85% of the total ILCR at PS and ES, respectively, thus indicating the need for development and implementation of indoor air quality guidelines in educations settings.
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