气候变化领域集成服务门户(CCPortal): Effects of relative humidity on heterogeneous reaction of SO2 with CaCO3 particles and formation of CaSO4·2H2O crystal as secondary aerosol

CCPortal

DOI	10.1016/j.atmosenv.2021.118776
	Effects of relative humidity on heterogeneous reaction of SO2 with CaCO3 particles and formation of CaSO4·2H2O crystal as secondary aerosol
	Yue Y.; Cheng J.; Lee K.S.; Stocker R.; He X.; Yao M.; Wang J.
发表日期	2022
ISSN	1352-2310
卷号	268
英文摘要	Haze related air pollution has become one of major environmental concerns in some Asian countries. Sulfate is a main component of ambient particulate matter (PM) in the urban environment during haze episodes. Among the pollutants, sulfur dioxide (SO2) is an important precursor of sulfate and new atmospheric particle formation. However, under different atmospheric conditions its underlying formation mechanisms are not clearly elucidated. In the current work, we collected ambient PM in two cities: Zurich (Switzerland) and Beijing (China). The PM morphology and the composition were investigated by scanning electron microscopy, energy dispersive X-Ray spectroscopy and Raman micro-spectroscopy. In addition, a series of lab controlled experiments were also performed to study the SO2 reaction with CaCO3 aerosol. We found different types of CaSO4·2H2O crystals in the Chinese urban samples, with clearly different compositions than those from Zurich. The experimental data showed that the relative humidity played a significant role on the new CaSO4·2H2O crystal formation including its size, morphology and composition. Relative humidity (RH) above 80% can significantly promote SO2 oxidation on the CaCO3 particles and form the CaSO4·2H2O crystals. In contrast, at relative humidity below 40%, only few CaCO3 particles can be converted to CaSO4 particles. The results of this study facilitate the understanding of secondary inorganic aerosol formation by the reaction of CaCO3 particles with SO2 with different RHs in different city environments, and provide useful information for air pollution control. © 2021 The Authors
关键词	CaSO4 Haze event Particulate matter Relative humidity Secondary inorganic aerosol Sulfur dioxide
语种	英语
scopus关键词	Aerosols; Atmospheric humidity; Calcite; Calcium carbonate; Energy dispersive spectroscopy; Humidity control; Morphology; Particles (particulate matter); Scanning electron microscopy; Ambient particulate Matter; Asian countries; Atmospheric particles; Environmental concerns; Haze event; Heterogeneous reactions; Particulate Matter; Secondary aerosols; Secondary inorganic aerosol; Urban environments; Sulfur dioxide; calcium carbonate; calcium sulfate; sulfur dioxide; aerosol formation; atmospheric particle; atmospheric pollution; calcium carbonate; relative humidity; sulfur dioxide; air pollution control; ambient air; Article; China; city; controlled study; crystallization; energy dispersive X ray spectroscopy; meteorology; oxidation; particle size; particulate matter; Raman spectrometry; reaction analysis; relative humidity; scanning electron microscopy; secondary organic aerosol; Switzerland; urban area; Beijing [China]; China; Switzerland; Zurich [Switzerland]
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/248168
作者单位	Institute of Environmental Engineering, ETH Zurich, Zurich, 8093, Switzerland; Laboratory for Advanced Analytical Technologies, Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, 8600, Switzerland; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China; State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
推荐引用方式 GB/T 7714	Yue Y.,Cheng J.,Lee K.S.,et al. Effects of relative humidity on heterogeneous reaction of SO2 with CaCO3 particles and formation of CaSO4·2H2O crystal as secondary aerosol[J],2022,268.
APA	Yue Y..,Cheng J..,Lee K.S..,Stocker R..,He X..,...&Wang J..(2022).Effects of relative humidity on heterogeneous reaction of SO2 with CaCO3 particles and formation of CaSO4·2H2O crystal as secondary aerosol.ATMOSPHERIC ENVIRONMENT,268.
MLA	Yue Y.,et al."Effects of relative humidity on heterogeneous reaction of SO2 with CaCO3 particles and formation of CaSO4·2H2O crystal as secondary aerosol".ATMOSPHERIC ENVIRONMENT 268(2022).