Chemical composition, structures, and light absorption of N-containingaromatic compounds emitted from burning wood and charcoal inhousehold cookstoves

doi:10.5194/acp-2020-594

GSTDTAP > 地球科学

DOI	10.5194/acp-2020-594
	Chemical composition, structures, and light absorption of N-containingaromatic compounds emitted from burning wood and charcoal inhousehold cookstoves
	Mingjie Xie, Zhenzhen Zhao, Amara L. Holder, Michael D. Hays, Xie Chen, Guofeng Shen, James J. Jetter, and Qin'geng Wang
	2020-06-22
发表期刊	Atmospheric Chemistry and Physics
出版年	2020
英文摘要	N-containing aromatic compounds (NACs) are an important group of light-absorbing molecules in the atmosphere. They are often observed in combustion emissions, but their chemical formulas and structural characteristics remain uncertain. In this study, red oak wood and charcoal fuels were burned in cookstoves using the standard water boiling test (WBT) procedure. Submicron aerosol particles in the cookstove emissions were collected using quartz (Q_f) and polytetrafluoroethylene (PTFE) filter membranes positioned in parallel. A back-up quartz filter (Q_b) was also installed downstream of the PTFE filter to evaluate the effect of sampling artifact on NACs measurements. Liquid chromatography-mass spectroscopy (LC-MS) techniques identified seventeen NAC chemical formulas in the cookstove emissions. The average concentrations of total NACs in Q_b samples (0.37 ± 0.31–1.78 ± 0.78 µg m⁻³) were greater than 50 % of those observed in the Q_f samples (0.47 ± 0.40–3.54 ± 1.63 µg m⁻³), and the Q_b to Q_f mass ratios of individual NACs had a range of 0.02–2.71, indicating that the identified NACs might have substantial fractions remaining in the gas-phase. In comparison to other sources, cookstove emissions from red oak or charcoal fuels did not exhibit unique NAC structural features, but had distinct NACs composition. However, before identifying NACs sources by combining their structural and compositional information, the gas-particle partitioning behaviors of NACs should be further investigated. The average contributions of total NACs to the light absorption of organic matter at λ = 365 nm (1.10–2.58 %) in Q_f samples are much lower than those in Q_b samples (10.7–21.0 %). These results suggest that more research is needed to understand the chemical and optical properties of gaseous chromophores and heavier molecular weight (e.g., MW > 500 Da) entities in particulate matter.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/278137
专题	地球科学
推荐引用方式 GB/T 7714	Mingjie Xie, Zhenzhen Zhao, Amara L. Holder, Michael D. Hays, Xie Chen, Guofeng Shen, James J. Jetter, and Qin'geng Wang. Chemical composition, structures, and light absorption of N-containingaromatic compounds emitted from burning wood and charcoal inhousehold cookstoves[J]. Atmospheric Chemistry and Physics,2020.
APA	Mingjie Xie, Zhenzhen Zhao, Amara L. Holder, Michael D. Hays, Xie Chen, Guofeng Shen, James J. Jetter, and Qin'geng Wang.(2020).Chemical composition, structures, and light absorption of N-containingaromatic compounds emitted from burning wood and charcoal inhousehold cookstoves.Atmospheric Chemistry and Physics.
MLA	Mingjie Xie, Zhenzhen Zhao, Amara L. Holder, Michael D. Hays, Xie Chen, Guofeng Shen, James J. Jetter, and Qin'geng Wang."Chemical composition, structures, and light absorption of N-containingaromatic compounds emitted from burning wood and charcoal inhousehold cookstoves".Atmospheric Chemistry and Physics (2020).