Comparison of water-soluble and insoluble organic compositions attributing to different light absorption efficiency between residential coal and biomass burning emissions DOI Creative Commons
Lu Zhang, Jin Li, Yaojie Li

et al.

Published: Nov. 13, 2023

Abstract. There are growing concerns about the climate impacts of absorbing organic carbon (also known as Brown Carbon, BrC) in environment, however, chemical composition and association with light absorption ability BrC remain poorly understood. In this study, focusing on one major source BrC, water-soluble water-insoluble (WSOC; WISOC) from residential solid fuel combustions were characterized at molecular level, evaluated for their quantitative relationship mass efficiency (MAE). The MAE values λ=365 nm biomass burning significantly higher than coal combustion smokes. Thousands peaks identified m/z range 150–800, most intense ion 200–500 WSOC 600–800 WISOC, respectively. CHO group was abundant component extracts emissions compared to coals; while sulfur-containing compounds (CHOS+CHONS, SOCs) more WISOC extracts, especially emissions. Emissions CHON positively correlated N content (r=0.936, p<0.05), which explained SOCs predominant flaming phases, seen a positive correlation between modified (MCE) (r=0.750, p<0.05). unique formulas aerosols lower H/C O/C regions unsaturated van Krevelen (VK) diagram. had high fractions condensed aromatics (32–59 %) only 4.3–9.7 % CHOS by larger aromatic compound combustion. values, both (r=0.714, p<0.05) (r=0.929, p<0.001), suggesting abundance variabilities across different fuels.

Language: Английский

Supplementary material to "Molecular signatures and formation mechanisms of particulate matter (PM) water-soluble chromophores from Karachi (Pakistan) over South Asia" DOI Open Access
Jiao Tang, Jun Li, Shizhen Zhao

et al.

Published: March 29, 2023

Language: Английский

Citations

0
Comparison of water-soluble and insoluble organic compositions attributing to different light absorption efficiency between residential coal and biomass burning emissions DOI Creative Commons
Lu Zhang, Jin Li, Yaojie Li

et al.

Published: Nov. 13, 2023

Abstract. There are growing concerns about the climate impacts of absorbing organic carbon (also known as Brown Carbon, BrC) in environment, however, chemical composition and association with light absorption ability BrC remain poorly understood. In this study, focusing on one major source BrC, water-soluble water-insoluble (WSOC; WISOC) from residential solid fuel combustions were characterized at molecular level, evaluated for their quantitative relationship mass efficiency (MAE). The MAE values λ=365 nm biomass burning significantly higher than coal combustion smokes. Thousands peaks identified m/z range 150–800, most intense ion 200–500 WSOC 600–800 WISOC, respectively. CHO group was abundant component extracts emissions compared to coals; while sulfur-containing compounds (CHOS+CHONS, SOCs) more WISOC extracts, especially emissions. Emissions CHON positively correlated N content (r=0.936, p<0.05), which explained SOCs predominant flaming phases, seen a positive correlation between modified (MCE) (r=0.750, p<0.05). unique formulas aerosols lower H/C O/C regions unsaturated van Krevelen (VK) diagram. had high fractions condensed aromatics (32–59 %) only 4.3–9.7 % CHOS by larger aromatic compound combustion. values, both (r=0.714, p<0.05) (r=0.929, p<0.001), suggesting abundance variabilities across different fuels.

Language: Английский

Citations

0