Effect of photooxidation on size distribution, light absorption, and molecular compositions of smoke particles from rice straw combustion

doi:10.1016/j.envpol.2022.119950

	Effect of photooxidation on size distribution, light absorption, and molecular compositions of smoke particles from rice straw combustion
	Zhao, Ranran 1,3,5; Zhang, Qixing 3; Xu, Xuezhe 2; Wang, Wenjia 3; Zhao, Weixiong 2; Zhang, Weijun 2,4; Zhang, Yongming 3
刊名	ENVIRONMENTAL POLLUTION
	2022-10-15
卷号	311
关键词	Biomass burning Photooxidation Non -polar and polar organic carbon Light absorption Molecular composition
ISSN号	0269-7491
DOI	10.1016/j.envpol.2022.119950
通讯作者	Zhang, Qixing(qixing@ustc.edu.cn)
英文摘要	Organic aerosol (OA) emitted from biomass burning (BB) impacts air quality and global radiation balance. However, the comprehensive characterization of OA remains poorly understood because of the complex evolutionary behavior of OA in atmospheric processes. In this work, smoke particles were generated from rice straw combustion. The effect of OH radicals photooxidation on size distribution, light absorption, and molecular compositions of smoke particles was systematically investigated. The results showed that the median diameters of smoke particles increased by a factor of approximately 1.2 after photooxidation. In the particle compositions, although both non-polar fractions (n-hexane-soluble organic carbon, HSOC) and polar fractions (water-soluble organic carbon, WSOC) underwent photobleaching after aging, the photobleaching properties of HSOC (1.87-2.19) was always higher than that of WSOC (1.52-1.33). Besides, the light-absorbing properties of HSOC were higher than that of WSOC, showing a factor of approximately 1.75 times for mass absorption efficiency at 365 nm (MAE(365)). Consequently, the simple forcing efficiency (SFE) caused by absorption showed that HSOC has higher radiation effects than WSOC. After photooxidation, the concentration of 16 PAHs in HSOC fractions significantly decreased by 15.3%-72.5%. In WSOC fractions, the content of CHO, CHONS, and CHOS compounds decreased slightly, while the content of CHON compounds increased. Meantime, the variations in molecular properties supported the decrease in light absorption of WSOC fractions. These results reveal the aging behavior of smoke particles, then stress the importance of non-polar organic fractions in particles, providing new insights into understanding the atmospheric pollution caused by BB smoke particles.
资助项目	National Key Research and Devel- opment Plan[2021YFC3001600] ; National Natural Science Foundation of China[U1733126] ; Funda- mental Research Funds for the Central Universities[WK2320000052]
WOS关键词	POLYCYCLIC AROMATIC-HYDROCARBONS ; BIOMASS-BURNING EMISSIONS ; HUMIC-LIKE SUBSTANCES ; ORGANIC AEROSOL FORMATION ; BROWN CARBON ; CHEMICAL-PROPERTIES ; OPTICAL-PROPERTIES ; MASS ; PARTICULATE ; EVOLUTION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000860744600001
资助机构	National Key Research and Devel- opment Plan ; National Natural Science Foundation of China ; Funda- mental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/129129]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Qixing
作者单位	1.Yancheng Inst Technol, Sch Emergency Management & Safety Engn, Yancheng 224051, Jiangsu, Peoples R China 2.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Lab Atmospher Physico Chem, HFIPS, Hefei 230031, Anhui, Peoples R China 3.Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China 4.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 5.Yancheng Inst Technol, Sch Chem & Chem Engn, Yancheng 224051, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Ranran,Zhang, Qixing,Xu, Xuezhe,et al. Effect of photooxidation on size distribution, light absorption, and molecular compositions of smoke particles from rice straw combustion[J]. ENVIRONMENTAL POLLUTION,2022,311.
APA	Zhao, Ranran.,Zhang, Qixing.,Xu, Xuezhe.,Wang, Wenjia.,Zhao, Weixiong.,...&Zhang, Yongming.(2022).Effect of photooxidation on size distribution, light absorption, and molecular compositions of smoke particles from rice straw combustion.ENVIRONMENTAL POLLUTION,311.
MLA	Zhao, Ranran,et al."Effect of photooxidation on size distribution, light absorption, and molecular compositions of smoke particles from rice straw combustion".ENVIRONMENTAL POLLUTION 311(2022).