Implications for biomass/coal combustion emissions and secondary formation of carbonaceous aerosols in North China.

ABSTRACT: To understand the origins, secondary formation and seasonality of carbonaceous aerosols in North China, we collected PM_2.5 samples on day- and night-time bases in summer and winter 2016 from a typical metropolis, Tianjin, and studied their carbonaceous components and stable carbon isotope ratios of total carbon (δ¹³C_TC). PM_2.5 ranged from 21.2 μg m^-3 to 74.8 μg m^-3 in summer and 25.3-816 μg m^-3 in winter. On average, organic carbon (OC) elemental carbon (EC) and water-soluble OC were found to be higher (3-5 times) in winter than that in summer. Secondary organic carbon that estimated by EC-tracer method was enhanced by a factor of 7 in winter compared to that in summer. δ¹³C_TC showed a small

SUBMITTER: Wang S 

PROVIDER: S-EPMC9089841 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature