Suburban air quality: Human health hazard assessment of potentially toxic elements in PM10.
PM10 samples were collected at two suburban locations in northern Spain, a traffic-industrial suburban (TIS) station located in the coastal city of Gijón and an industrial suburban (IS) station in Langreo, about 25 km inland. The aerosol samples were chemically analysed to determine ambient air concentrations of As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Se, V and Zn. The results showed that the mean levels of As, Co, Cu, Fe, Mn, Ni, Pb and Se recorded at the IS location were higher than those at the TIS station. Mean levels of Fe and Zn in PM10 were higher than all other species at both the TIS and IS sampling sites (467 and 353 ng Fe/m3and 46 and 282 ng Zn/m3, respectively). Human exposure to these twelve potentially toxic elements through PM10 was assessed for both children and adults using the U.S.EPA method, considering three pathways: ingestion, dermal contact and inhalation. In general, the IS location presented higher non-cancer risks than the TIS site. However, at both suburban locations, cancer and non-cancer risk values were in the acceptable range for adults, some exceptions being found. Greater health risk was estimated in the case of children. For this sector of the population, ingestion, dermal contact and/or inhalation of As, Pb and Zn in PM10 may pose a health hazard owing to possible carcinogenic/non-carcinogenic effects.
Department of Chemical and Environmental Engineering, Polytechnic School of Engineering, Gijón Campus, University of Oviedo, 33203 Gijón, Spain.
Laura
L
Megido
Department of Materials Science and Metallurgical Engineering, Polytechnic School of Engineering, Gijón Campus, University of Oviedo, 33203 Gijón, Spain.
Beatriz
B
Suárez-Peña
Department of Chemical and Environmental Engineering, Technical University of Cartagena, 30203 Cartagena, Spain.
Luis
L
Negral
Department of Chemical and Environmental Engineering, Polytechnic School of Engineering, Gijón Campus, University of Oviedo, 33203 Gijón, Spain. Electronic address: cleonor@uniovi.es.
Leonor
L
Castrillón
Department of Chemical and Environmental Engineering, Polytechnic School of Engineering, Gijón Campus, University of Oviedo, 33203 Gijón, Spain.
Yolanda
Y
Fernández-Nava
D000328:Adult; D000393:Air Pollutants / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D002857:Chromium / Q000737:chemistry; D002947:Cities; D004784:Environmental Monitoring / Q000379:methods; D006801:Humans; D007221:Industry; D019216:Metals, Heavy / Q000032:analysis; D009369:Neoplasms / Q000517:prevention & control*; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis; D018570:Risk Assessment / Q000379:methods; D013030:Spain; D055815:Young Adult
D000393:Air Pollutants; D019216:Metals, Heavy; D052638:Particulate Matter; D002857:Chromium
Chemical composition; Children's exposure; Health impact; Heavy metal; Particulate matter; Suburban air pollution