Resumo (PT):
Abstract (EN):
This study evaluated risks associated with inhalation exposure to carcinogenic PAHs for populations of primary schools teachers. Ten carcinogenic (probable, possible) PM2.5–bound PAHs were collected in indoor air of 9 classrooms at four Portuguese primary schools (PSC–PSR) during winter–spring 2014. The highest total levels of ten carcinogenic (Σ10PAH = 21.3–25.6 ng m–3) were found in classrooms at a school with busy traffic (in the surrounding streets) whereas the lowest indoor concentrations were obtained in classrooms of a school situated in residential zone (0.47–0.72 ng m–3). Dibenz[a,h]anthracene (21–29% of Σ10PAH), benzo[b]fluoranthene (13–28%) and naphthalene (5–40%) were the most abundant congeners in indoor air of classrooms, whereas benz[a]anthracene was among the least abundant PAHs (1–3%). Values of total incremental lifetime cancer risks (i.e. sum of risks of ten carcinogenic PAH congeners) were below the USEPA guideline level of 10–6 for teachers at all studied schools (independently of the duration of the employment) and thus the risks can be considered as negligible. © 2017 Taylor & Francis Group, London.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
12