Enhancement of secondary organic aerosol formation and its oxidation state by SO2 during photooxidation of 2-methoxyphenol

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	Enhancement of secondary organic aerosol formation and its oxidation state by SO2 during photooxidation of 2-methoxyphenol
	Liu, Changgeng ; Chen, Tianzeng ; Liu, Yongchun ; Liu, Jun ; He, Hong ; Zhang, Peng
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2019-03-01
卷号	19 期号:4 页码:2687-2700
ISSN号	1680-7316
英文摘要	2-Methoxyphenol (guaiacol) is derived from the lignin pyrolysis and taken as a potential tracer for wood smoke emissions. In this work, the effect of SO2 at atmospheric levels (0-56 ppbv) on secondary organic aerosol (SOA) formation and its oxidation state during guaiacol photooxidation was investigated in the presence of various inorganic seed particles (i.e., NaCl and. (NH4)(2)SO4). Without SO2 and seed particles, SOA yields ranged from (9.46 +/- 1.71)% to (26.37 +/- 2.83)% and could be well expressed by a one-product model. According to the ratio of the average gas-particle partitioning timescale ((tau) over bar (g-p)) over the course of the experiment to the vapor wall deposition timescale ((tau) over bar (g-w)), the determined SOA yields were underestimated by a factor of similar to 2. The presence of SO2 resulted in enhancing SOA yield by 14.04 %-23.65 %. With. (NH4)(2)SO4 and NaCl seed particles, SOA yield was enhanced by 23.07% and 29.57 %, respectively, which further increased significantly to 29.78%-53.43% in the presence of SO2, suggesting that SO2 and seed particles have a synergetic contribution to SOA formation. The decreasing trend of the (tau) over bar (g-p)/(tau) over bar (g-w) ratio in the presence of seed particles and SO2 suggested that more SOA-forming vapors partitioned into the particle phase, consequently increasing SOA yields. It should be noted that SO2 was found to be in favor of increasing the carbon oxidation state (OSC) of SOA, indicating that the functionalization or the partitioning of highly oxidized products into particles should be more dominant than the oligomerization. In addition, the average N/C ratio of SOA was 0.037, which revealed that NOx participated in the photooxidation process, consequently leading to the formation of organic N-containing compounds. The experimental results demonstrate the importance of SO2 on the formation processes of SOA and organic S-containing compounds and are also helpful to further understand SOA formation from the atmospheric photooxidation of guaiacol and its subsequent impacts on air quality and climate.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43244]
专题	生态环境研究中心_水污染控制实验室
作者单位	1.Panzhihua Univ, Sch Biol & Chem Engn, Panzhihua 617000, Peoples R China 2.Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Changgeng,Chen, Tianzeng,Liu, Yongchun,et al. Enhancement of secondary organic aerosol formation and its oxidation state by SO2 during photooxidation of 2-methoxyphenol[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(4):2687-2700.
APA	Liu, Changgeng,Chen, Tianzeng,Liu, Yongchun,Liu, Jun,He, Hong,&Zhang, Peng.(2019).Enhancement of secondary organic aerosol formation and its oxidation state by SO2 during photooxidation of 2-methoxyphenol.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(4),2687-2700.
MLA	Liu, Changgeng,et al."Enhancement of secondary organic aerosol formation and its oxidation state by SO2 during photooxidation of 2-methoxyphenol".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.4(2019):2687-2700.