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Sci Total Environ

Title:		Dwindling aromatic compounds in fine aerosols from chunk coal to honeycomb briquette combustion
Author(s):		Wei W; Xie Q; Yan Q; Hu W; Chen S; Su S; Zhang D; Wu L; Huang S; Zhong S; Deng J; Yang T; Li J; Pan X; Wang Z; Sun Y; Kong S; Fu P;
Address:		"School of Earth System Science, Tianjin University, Tianjin 300072, China. Department of Atmospheric Science, School of Environmental Sciences, China University of Geosciences, Wuhan 430074, China. LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China. Department of Atmospheric Science, School of Environmental Sciences, China University of Geosciences, Wuhan 430074, China. Electronic address: kongshaofei@cug.edu.cn. School of Earth System Science, Tianjin University, Tianjin 300072, China. Electronic address: fupingqing@tju.edu.cn"
Journal Title:		Sci Total Environ
Year:		2022
Volume:		20220518
Issue:		Pt 2
Page Number:		155971 -
DOI:		10.1016/j.scitotenv.2022.155971
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"With the implementation of clean coal policy in China, the chunk coal has been gradually replaced by honeycomb briquette in domestic energies. In this study, the molecular composition of fine particles (PM(2.5)) from chunk coal and honeycomb briquette combustion is characterized using the Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS). More than 6000 molecular formulae were detected in each PM(2.5) sample. A remarkable decrease in unsaturation and aromatic compounds was found from chunk coal to honeycomb briquette derived aerosols. Around 73.6% of the unique CHON compounds in chunk coal are considered to have aromatic structures, while it decreased to 7.3% in honeycomb briquette. Most of these nitroaromatics detected only in chunk coal are highly carcinogenic and mutagenic with 4-6 rings. Moreover, the aromatic compounds in sulfur-containing compounds also showed a significant decrease. Meanwhile, because of the perforated shape and the additives added during the production of honeycomb briquettes, there are more heteroatoms-containing molecules released from honeycomb briquette combustion, which are highly functional compounds with high molecular weight, high degree of oxidation, and low volatility. Our results provide molecular level evidence that the transformation from chunk coal to honeycomb briquette can effectively reduce the emission of aromatic compounds, which is beneficial to assessing and reducing the impacts to climate change as well as human health"
Keywords:		Aerosols/analysis *Air Pollutants/analysis China Coal/analysis Humans Organic Chemicals/analysis Particulate Matter/analysis *Polycyclic Aromatic Hydrocarbons/analysis Aromatic compounds Clean coal policy Coal combustion Ft-icr ms Heteroatoms-containing c;
Notes:		"MedlineWei, Wan Xie, Qiaorong Yan, Qin Hu, Wei Chen, Shuang Su, Sihui Zhang, Donghuan Wu, Li Huang, Shu Zhong, Shujun Deng, Junjun Yang, Ting Li, Jie Pan, Xiaole Wang, Zifa Sun, Yele Kong, Shaofei Fu, Pingqing eng Netherlands 2022/05/22 Sci Total Environ. 2022 Sep 10; 838(Pt 2):155971. doi: 10.1016/j.scitotenv.2022.155971. Epub 2022 May 18"