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Mass absorption efficiency and optical emission assessment of elemental carbon from residential solid fuel combustion
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DOI：10.1016/j.atmosres.2026.108871.png)
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Abstract
En 中文
The distinctive light-absorption properties of elemental carbon (EC) emitted from solid fuel combustion significantly influence both regional and global climate systems. This study investigated the mass absorption efficiency of EC (MAEEC) at 633 nm wavelength using laboratory-simulated biomass and coal combustion combined with carbon analysis. Diagnostic ratios of carbon components, including EC/PM2.5, organic carbon (OC)/EC, and char-EC/soot-EC, were investigated to characterize the difference in crop residue, wood, and coal combustion emissions. The average MAEEC values varied significantly among fuel types, with crop residue burning showing the highest value (11.2 f 3.2 m2 g-1), followed by coal combustion (5.5 f 2.2 m2 g-1) and wood burning (3.0 f 0.9 m2 g-1). Multiple linear regression analysis revealed that OC/EC ratio was the primary factor influencing MAEEC values, possibly attributed to the lensing effect of OC coating. An optical emission inventory of EC from residential solid fuel combustion in the Guanzhong Plain was further developed using our experimentally determined MAEEC, referenced mass emission factors of EC, and county-level activity data to quantify regional optical impacts. These results should advance the understanding of EC radiative effects from residential solid fuel combustion and provide crucial scientific evidence for developing targeted emission reduction policies.
Keywords:
Elemental carbon
Mass absorption efficiency
Solid fuel
Residential combustion
Optical emission inventory
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