| Title | Variabilities in Primary N-Containing Aromatic Compound Emissions from Residential Solid Fuel Combustion and Implications for Source Tracers |
| Authors | Zhang, Lu Hu, Bin Liu, Xinlei Luo, Zhihan Xing, Ran Li, Yaojie Xiong, Rui Li, Gang Cheng, Hefa Lu, Qiang Shen, Guofeng Tao, Shu |
| Affiliation | Peking Univ, Lab Earth Surface Process, Coll Urban & Environm Sci, Beijing 100871, Peoples R China North China Elect Power Univ, Natl Engn Res Ctr New Energy Power Generat, Beijing 102206, Peoples R China Beijing Technol & Business Univ, Sch Mat Sci & Mechan Engn, Beijing 100048, Peoples R China Southern Univ Sci & Technol, Coll Environm Sci & Technol, Shenzhen 518055, Peoples R China |
| Keywords | PARTICULATE NITRATED PHENOLS ABSORPTION ANGSTROM EXPONENT BLACK CARBON EMISSIONS HUMIC-LIKE SUBSTANCES LIGHT-ABSORPTION BROWN CARBON COAL COMBUSTION MOLECULAR CHARACTERIZATION CHEMICAL-COMPOSITION SECONDARY FORMATION |
| Issue Date | Sep-2022 |
| Publisher | ENVIRONMENTAL SCIENCE & TECHNOLOGY |
| Abstract | Nitroaromatic compounds (NACs) not only are strongly absorbing chromophores but also adversely affect human health. NACs can be emitted from incomplete combustions and can derive secondarily through photochemical reactions. Here, emission experiments were conducted for 31 fuel-stove combinations to elucidate variations in, and influencing factors of, NAC emission factors (EF n-expressionry sumexpressiontion NACs) and to explore potential tracers for different combustion sources. EF n-expressionry sumexpressiontion NACs varied by 2 orders of magnitude among different combinations. Differences in fuel type contributed more than the stove difference to the observed variation. EF n-expressionry sumexpressiontion NACs for biomass pellets was approximately 66% lower than that for raw biomass, although the bulk organic and brown carbon EFs were 95% lower. 2-Nitro-1-naphthol was the most abundant individual compound, followed by 4-nitrocatechol, while acid compounds (salicylic acid and benzoic acid) were low in abundance (< 1%). Substantially different profiles were observed between coal and biomass burning emissions. Biomass burning had more single-ring-based phenolic compounds with more 4-nitrocatechol, while in coal combustion, more two-ring products were produced. This study demonstrated much lower ratios of 2-nitro-1-naphthol/4-nitrocatechol for biomass in both traditional (2.0 +/- 3.5) and improved stoves (3.0 +/- 2.1) than for coals (15 +/- 6). Coal and biomass burning differed in not only EF n-expressionry sumexpressiontion NACs but also compound profile, consequently leading to distinct health and climate impacts; moreover, the ratio of 2-nitro-1-naphthol/4-nitrocatechol may be used in source apportionment of NACs. |
| URI | http://hdl.handle.net/20.500.11897/655170 |
| ISSN | 0013-936X |
| DOI | 10.1021/acs.est.2c03000 |
| Indexed | SCI(E) |
| Appears in Collections: | 城市与环境学院 地表过程分析与模拟教育部重点实验室 |
