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• W3201283455 startingPage "115" @default.
• W3201283455 abstract "Atmospheric polycyclic aromatic hydrocarbons (PAHs) are of significant interest owing to their high potential health effects, including mutagenicity and carcinogenicity. We report 16 PAHs measured in ambient PM2.5 from June 2018 to May 2019 over three different sites located in central east India. The annual average PM2.5 mass concentrations of 97.3 ± 18.1 µg m-3, 101.9 ± 19.4 µg m-3, and 93.9 ± 20.3 µg m-3 were measured at RCI (Ranchi), GHY (Gamharia), and BKR (Bokaro), respectively. The mass concentrations at all sampling sites are relatively higher than the annual average concentration of the National Ambient Air Quality Standard. Total annual PAH concentrations (ng m-3) are found to be comparable at BKR (797.9 ± 39.1 ng m-3) and RCI (887.7 ± 38.8 ng m-3); however, a relatively higher average is observed over GHY (1015.1 ± 42.7 ng m-3). Using PAH diagnostic ratios and principal component analysis (PCA), their major sources were attributed to coal and wood combustion as well as vehicular emission of diesel and gasoline at all sampling sites. Significant seasonal variability is observed for PAH composition and mainly attributed to change in emission sources. Summer and winter compositions were found to be impacted by the transport from Indo-Gangetic Plains (IGP). However, ambient level PAHs during the post-monsoon season were impacted by mixed sources from Indo-Gangetic Plain and eastern India. These observations are supported by the analysis of back-trajectory and fire count data. The excess life time cancer risk (ELCR) values estimated for the study sites are within acceptable limits suggesting acceptable risk levels at BKR, GHY, and RCI. This study highlights the significance of ambient aerosol concentration for health risks in the pre-COVID-19 scenario." @default.
• W3201283455 created "2021-09-27" @default.
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• W3201283455 date "2021-09-14" @default.
• W3201283455 modified "2023-10-14" @default.
• W3201283455 title "Temporal variability of atmospheric particulate-bound polycyclic aromatic hydrocarbons (PAHs) over central east India: sources and carcinogenic risk assessment" @default.
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• W3201283455 doi "https://doi.org/10.1007/s11869-021-01089-5" @default.
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