Pollution Characteristics and Carcinogenic Risk Assessment of PAHs in Car Dust Collected from Commercial Car Wash in Changchun, Northeast China

In the collection of dust, vacuum cleaners are used to clean everything inside car, including floor/carpet, seat, console, etc. To investigate characteristics, possible sources and carcinogenic risks polycyclic aromatic hydrocarbons (PAHs) contamination in car fourteen dust samples were collected from commercial washes Changchun, Northeast China. The 16 priority PAHs all detected 100%, predominantly tetracyclic. mean ?16PAHs content was 9297.79 ± 5855.89 ng g?1, ranging 2940.03 23,174.51 g?1. Black carbon, total carbon weakly correlated. results positive matrix factorization indicated that coal combustion contributed 30.03% biomass 24.70%. Vehicle exhaust traffic emissions, mainly incomplete gasoline diesel, 45.27% PAHs. incremental lifetime cancer risk (ILCR) values for children adults 4.94 × 10?3 4.37 10?3, respectively, both above threshold value 10?4. This indicates put at high risk, exposed a higher than adults. study provides basis proposing targeted measures control PAHs’ dust.