Contribution of brown carbon to light absorption in emissions of European residential biomass combustion appliances

被引:6
作者
Basnet, Satish [1 ]
Hartikainen, Anni [1 ]
Virkkula, Aki [2 ]
Yli-Pirila, Pasi [1 ]
Kortelainen, Miika [1 ]
Suhonen, Heikki [1 ]
Kilpelainen, Laura [1 ]
Ihalainen, Mika [1 ]
Vaatainen, Sampsa [1 ]
Louhisalmi, Juho [1 ]
Somero, Markus [1 ]
Tissari, Jarkko [1 ]
Jakobi, Gert [3 ,4 ]
Zimmermann, Ralf [3 ,4 ]
Kilpelainen, Antti [5 ]
Sippula, Olli [1 ,6 ]
机构
[1] Univ Eastern Finland, Dept Environm & Biol Sci, Kuopio 70211, Finland
[2] Finnish Meteorol Inst, Atmospher Composit Res, Helsinki 00101, Finland
[3] Univ Rostock, Dept Analyt & Tech Chem, D-18059 Rostock, Germany
[4] Helmholtz Zentrum Munchen, Helmholtz Zent Munchen, Comprehens Mol Analyt, D-85764 Neuherberg, Germany
[5] Univ Eastern Finland, Sch Forest Sci, Joensuu 80101, Finland
[6] Univ Eastern Finland, Dept Chem, Joensuu 80101, Finland
关键词
BLACK CARBON; SOURCE APPORTIONMENT; ANGSTROM EXPONENT; ELEMENTAL CARBON; OPTICAL-PROPERTIES; ORGANIC-CARBON; FOSSIL-FUEL; AEROSOL; AETHALOMETER; DEPENDENCE;
D O I
10.5194/acp-24-3197-2024
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Residential biomass combustion significantly contributes to light-absorbing carbonaceous aerosols in the atmosphere, impacting the earth's radiative balance at regional and global levels. This study investigates the contribution of brown carbon (BrC) to the total particulate light absorption in the wavelength range of 370-950 nm (BrC 370 - 950 ) and the particulate absorption angstrom ngstrom exponents (AAE 470 / 950 ) in 15 different European residential combustion appliances using a variety of wood-based fuels. BrC 370 - 950 was estimated to be from 1 % to 21 % for wood log stoves and 10 % for a fully automatized residential pellet boiler. Correlations between the ratio of organic to elemental carbon (OC / EC) and BrC 370 - 950 indicated that a one-unit increase in OC / EC corresponded to approximately a 14 % increase in BrC 370 - 950 . Additionally, BrC 370 - 950 was clearly influenced by the fuel moisture content and the combustion efficiency, while the effect of the combustion appliance type was less prominent. AAE 470 / 950 of wood log combustion aerosols ranged from 1.06 to 1.61. By examining the correlation between AAE 470 / 950 and OC / EC, an AAE 470 / 950 close to unity was found for pure black carbon (BC) particles originating from residential wood combustion. This supports the common assumption used to differentiate light absorption caused by BC and BrC. Moreover, diesel aerosols exhibited an AAE 470 / 950 of 1.02, with BrC contributing only 0.66 % to the total absorption, aligning with the assumption employed in source apportionment. These findings provide important data to assess the BrC from residential wood combustion with different emission characteristics and confirm that BrC can be a major contributor to particulate UV and near-UV light absorption for northern European wood stove emissions with relatively high OC / EC ratios.
引用
收藏
页码:3197 / 3215
页数:19
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