A nationwide survey of polycyclic aromatic hydrocarbons (PAHs) in household dust in China: spatial distribution, sources, and health risk assessment.

Autor: Liu B; College of Chemistry, Changchun Normal University, Changchun, 130032, China., Yu X; School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun, 130022, China., Lv L; College of Chemistry, Changchun Normal University, Changchun, 130032, China., Dong W; College of Geographic Sciences, Changchun Normal University, Changchun, 130032, China., Chen L; College of Chemistry, Changchun Normal University, Changchun, 130032, China., Wu W; China Construction Industrial Engineering and Technology Research Academy Co. Ltd., Beijing, 101399, China., Yu Y; Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China. yuyong@iga.ac.cn.
Jazyk: angličtina
Zdroj: Environmental geochemistry and health [Environ Geochem Health] 2023 Jul; Vol. 45 (7), pp. 4979-4993. Date of Electronic Publication: 2023 Apr 04.
DOI: 10.1007/s10653-023-01563-2
Abstrakt: As a carrier of toxic substances, household dust has a great impact on human health. Here we collected 73 household dust samples from 27 provinces and 1 municipality in China to investigate the levels, spatial distribution, sources, and carcinogenic risk of 16 polycyclic aromatic hydrocarbons (PAHs). The total concentrations of 14 detected PAHs (∑ 14 PAHs) ranged from 3.72 to 60,885 ng g -1 . High ∑ 14 PAHs were found in Northeast and Southwest China. High molecular weights (HMW) PAHs (4-6 rings) were predominant PAHs in most dust samples, accounting for 93.6% of ∑ 14 PAHs. Household fuel, cooking frequency, air conditioning, and smoking were the main factors influencing PAH concentrations in household dust. Principal component analysis model indicated that fossil combustion (81.5%) and biomass combustion and vehicle exhaust (8.1%) are the primary sources of PAHs. Positive matrix factorization model suggested that household cooking and heating contributed about 70% of ∑ 14 PAHs, and smoking contributed another 30%. The values of benzo[a]pyrene equivalent in rural dust were found to be higher than those in urban dust. The sum of toxic equivalents (TEQs) of 14 PAHs were in range of 0.372-7241 ng g -1 , in which 7 HMW PAHs accounted for 98.0 ± 1.98% of the total TEQs. Monte Carlo Simulation showed a low to moderate potential carcinogenic risk of PAHs in household dusts. This study documents comprehensive information on human exposure to PAHs in household dust at a national-scale.
(© 2023. The Author(s), under exclusive licence to Springer Nature B.V.)
Databáze: MEDLINE
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