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DOI	10.1016/j.atmosres.2021.105513
	Sulfur isotope composition during heterogeneous oxidation of SO2 on mineral dust: The effect of temperature, relative humidity, and light intensity
	Xu M.; Qiu P.; He Y.; Guo S.; Bai Y.; Zhang H.; Zhao S.; Shen X.; Zhu B.; Guo Q.; Guo Z.
发表日期	2021
ISSN	0169-8095
卷号	254
英文摘要	Sulfate as the major constituent of atmospheric aerosol plays a key role in aerosol formation and aging processes. However, little attention has been paid to the impacts of mineral dust on the oxidation of SO2, along with the effects of temperature, moisture, and light intensity. In this study, the influences of these parameters on the formation of sulfate and sulfur isotope composition were investigated in detail. Temperature promoted the heterogeneous oxidation of SO2 on the surface of hematite (α-Fe2O3), while excessive temperature was unfavorable for sulfate formation. Besides, the effect of temperature on sulfur isotope fractionation was not apparent. In addition, relative humidity (RH, < 40%) boosted the oxidation of SO2 with the concurrent enrichment of heavy isotope. Meanwhile, light with high intensity inhibited the formation of sulfate due to the photo-induced reductive dissolution of hematite, and had little effects on the sulfur isotope compositions. Furthermore, compared with other minerals, α-Fe2O3 exhibited greater uptake capacity of SO2, favoring the enrichment of light sulfur isotopes, whereas the enrichment of heavy sulfur isotopes existed on the surface of MgO. This study contributes to the investigation of the heterogeneous oxidation of SO2 and provides useful parameters for atmospheric modeling studies. © 2021
英文关键词	Fractionation; Meteorological factor; δ34S
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236813
作者单位	Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CIC-AEET), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China; School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
推荐引用方式 GB/T 7714	Xu M.,Qiu P.,He Y.,et al. Sulfur isotope composition during heterogeneous oxidation of SO2 on mineral dust: The effect of temperature, relative humidity, and light intensity[J],2021,254.
APA	Xu M..,Qiu P..,He Y..,Guo S..,Bai Y..,...&Guo Z..(2021).Sulfur isotope composition during heterogeneous oxidation of SO2 on mineral dust: The effect of temperature, relative humidity, and light intensity.Atmospheric Research,254.
MLA	Xu M.,et al."Sulfur isotope composition during heterogeneous oxidation of SO2 on mineral dust: The effect of temperature, relative humidity, and light intensity".Atmospheric Research 254(2021).