气候变化领域集成服务门户(CCPortal): A chamber study of catalytic oxidation of SO2 by Mn2+/Fe3+ in aerosol water

CCPortal

DOI	10.1016/j.atmosenv.2020.118019
	A chamber study of catalytic oxidation of SO2 by Mn2+/Fe3+ in aerosol water
	Zhang H.; Xu Y.; Jia L.
发表日期	2021
ISSN	13522310
卷号	245
英文摘要	The catalytic oxidation of SO2 by metal ions in aerosol water may be one of the important sources of sulfate in the atmospheric environment. In order to better understand the catalytic oxidation in aerosol water, a series of experiments were carried out in a smog chamber system under the conditions of relatively low concentrations of SO2 with Mn2+/Fe3+ as catalysts in NaNO3 aerosol water. In the Mn2+-catalytic oxidation process, the reaction rate (R) in aerosol water is expressed as R = 2.0 × 104 [Mn2+][S(IV)]1.3 at the initial pH range 4–5, which is about 2 orders of magnitude higher than that in bulk water. When the pH of aerosol water and relative humidity (RH) are high, the catalytic oxidation of SO2 by Mn2+ in aerosol water is probably an important source of sulfate. In the Fe3+-catalytic oxidation process, the reaction rate is significantly lower than that of Mn2+-catalytic oxidation, and the rate hardly exceeds 2 orders of magnitude larger than that in bulk water. The role of synergistic catalysis between Fe3+ and Mn2+ for oxidation of SO2 in aerosol water is very limited. © 2020 Elsevier Ltd
英文关键词	Aerosol water; Catalytic oxidation; Mn2+/Fe3+; Sulfate; Sulfur dioxide
语种	英语
scopus关键词	Aerosols; Atmospheric humidity; Iron compounds; Manganese compounds; Manganese removal (water treatment); Metal ions; Metals; Nitrogen compounds; Oxidation; Reaction rates; Sodium nitrate; Sulfur dioxide; Atmospheric environment; Bulk water; Initial pH; Low concentrations; Orders of magnitude; Smog chambers; Synergistic catalysis; Catalytic oxidation; aerosol; catalysis; manganese; oxidation; reaction rate; relative humidity
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144784
作者单位	State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Department of Atmospheric Chemistry and Environmental Sciences, College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Zhang H.,Xu Y.,Jia L.. A chamber study of catalytic oxidation of SO2 by Mn2+/Fe3+ in aerosol water[J],2021,245.
APA	Zhang H.,Xu Y.,&Jia L..(2021).A chamber study of catalytic oxidation of SO2 by Mn2+/Fe3+ in aerosol water.Atmospheric Environment,245.
MLA	Zhang H.,et al."A chamber study of catalytic oxidation of SO2 by Mn2+/Fe3+ in aerosol water".Atmospheric Environment 245(2021).