title: Polycyclic aromatic hydrocarbons (PAHs) in indoor dusts of Guizhou, southwest of China: status, sources and potential human health risk.
abstract: Polycyclic aromatic hydrocarbons (PAHs) were analyzed for 136 indoor dust samples collected from Guizhou province, southwest of China. The ∑18PAHs concentrations ranged from 2.18 μg•g-1 to 14.20 μg•g-1 with the mean value of 6.78 μg•g-1. The highest Σ18PAHs concentration was found in dust samples from orefields, followed by city, town and village. Moreover, the mean concentration of Σ18PAHs in indoor dust was at least 10% higher than that of outdoors. The 4-6 rings PAHs, contributing more than 70% of ∑18PAHs, were the dominant species. PAHs ratios, principal component analysis with multiple linear regression (PCA-MLR) and hierarchical clustering analysis (HCA) were applied to evaluate the possible sources. Two major origins of PAHs in indoor dust were identified as vehicle emissions and coal combustion. The mean incremental lifetime cancer risk (ILCR) due to human exposure to indoor dust PAHs in city, town, village and orefield of Guizhou province, China was 6.14×10-6, 5.00×10-6, 3.08×10-6, 6.02×10-6 for children and 5.92×10-6, 4.83×10-6, 2.97×10-6, 5.81×10-6 for adults, respectively.
authors.affiliation: College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, P.R. China; College of Civil Engineering, Guizhou University, Guiyang, Guizhou Province, P.R. China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Engineering Laboratory for Quality Control and Evaluation Technology of Medicine, Guizhou Normal University, Guiyang, Guizhou Province, P.R. China.
authors.forename: Huaguo
authors.initials: H
authors.lastname: Chen
authors.affiliation: College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, P.R. China.
authors.forename: Baizhan
authors.initials: B
authors.lastname: Li
mesh_terms: D016902:Air Pollution, Indoor / Q000009:adverse effects*; D002681:China; D004391:Dust; D006801:Humans; D009369:Neoplasms / Q000453:epidemiology*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000633:toxicity; D018570:Risk Assessment
chemical_list: D004391:Dust; D011084:Polycyclic Aromatic Hydrocarbons