title: PAHs in indoor dust samples in Shanghai's universities: levels, sources and human exposure.
abstract: Given the significant amount of time people spend indoors, the occurrence of polycyclic aromatic hydrocarbons (PAHs) in indoor dust and their potential risks are of great concern. In the present study, ten dust samples from lecture theatres and twelve samples from dining halls were collected from university campuses in Shanghai to investigate the PAH levels, possible sources and human exposure. The total concentrations of 18 PAHs ranged from 9.84 to 21.44 μg/g for dust samples from lecture theatres, and 9.63-44.13 μg/g for samples from dining halls. Total PAH concentrations in indoor dust samples showed a better correlation to black carbon compared to total organic carbon contents. PAHs in dining halls samples showed a similar distribution pattern with that of commercial kitchen air, which indicated that cooking activities could contribute most of the PAHs found in dining halls. Principal component analysis revealed both petrogenic and pyrogenic sources. The potential health risk for PAHs was assessed in terms of BaP equivalent carcinogenic power and estimated daily intake (EDI). Relatively high EDI values compared to other studies suggested that PAHs posed a potential threat to human health in indoor environments at Shanghai's universities.
authors.affiliation: Key Laboratory of Geographic Information Science of the Ministry of Education, School of Resource and Environmental Sciences, East China Normal University, 3663 Zhongshan North Road, Shanghai, 200062, China.
authors.forename: Huan
authors.initials: H
authors.lastname: Peng
authors.forename: Yi
authors.initials: Y
authors.lastname: Yang
authors.forename: Min
authors.initials: M
authors.lastname: Liu
authors.forename: John L
authors.initials: JL
authors.lastname: Zhou
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D002273:Carcinogens / Q000032:analysis; D002681:China; D002947:Cities; D004391:Dust / Q000032:analysis*; D004784:Environmental Monitoring; D006801:Humans; D019570:Inhalation Exposure; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D018570:Risk Assessment; D014495:Universities
chemical_list: D000393:Air Pollutants; D002273:Carcinogens; D004391:Dust; D011084:Polycyclic Aromatic Hydrocarbons