Light absorption of organic carbon emitted from burning wood, charcoal, and kerosene in household cookstoves.

ABSTRACT: Household cookstove emissions are an important source of carbonaceous aerosols globally. The light-absorbing organic carbon (OC), also termed brown carbon (BrC), from cookstove emissions can impact the Earth's radiative balance, but is rarely investigated. In this work, PM_2.5 filter samples were collected during combustion experiments with red oak wood, charcoal, and kerosene in a variety of cookstoves mainly at two water boiling test phases (cold start CS, hot start HS). Samples were extracted in methanol and extracts were examined using spectrophotometry. The mass absorption coefficients (MAC_λ, m² g^-1) at five wavelengths (365, 400, 450, 500, and 550 nm) were mostly inter-correlated and were used as a measurement proxy for BrC. The MAC_365<

SUBMITTER: Xie M 

PROVIDER: S-EPMC6715134 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature