Abundance and Light Absorption Properties of Brown Carbon Emitted from Residential Coal Combustion in China

• DOI: 10.1021/acs.est.8b05630
• Publication Date: 2018-12-25T10:17:16Z
• Authors: Meiju Li; Xingjun Fan; Mengbo Zhu; Chunlin Zou; Jianzhong Song; Siye Wei; Wanglu Jia; Ping’an Peng
• Keywords: Carbon fibers

Brown carbon (BrC) fractions, including water-soluble organic (WSOC), humic-like substances (HULISw), alkaline soluble (ASOC), and methanol (MSOC) were extracted from particles emitted the residential combustion of coal with different geological maturities. The abundances light absorption properties these BrC fractions comprehensively studied. results showed that constituents fraction varied greatly extraction solvent, accounting for 4.3%-46%, 2.3%-23%, 3.2%-14%, 76%-98% total content in particles. specific UV-vis absorbance (SUVA254) followed order MSOC > ASOC HULISw WSOC. WSOC low maturity had relatively SUVA254 high SR values. mass efficiencies (MAE365) higher than WSOC, levels absorption. These findings indicated is a potential source atmospheric abundance combustion-derived strongly dependent on methods used rather shapes.