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DOI	10.1016/j.atmosenv.2021.118341
	Key factors influencing the formation of sulfate aerosol on the surface of mineral aerosols: Insights from laboratory simulations and ACSM measurements
	Han L.; Liu X.; Chen Y.; Xiang X.; Cheng S.; Wang H.
发表日期	2021
ISSN	1352-2310
卷号	253
英文摘要	A significant technique of combining simulation experiments with a long-term real-time field measurement was first deployed to explore impacts of various environmental factors on formations of sulfate aerosol on the surface of mineral aerosols as MgO in the different reaction systems, and synergistic impacts of these environmental factors on the formation of sulfate aerosols in the different seasonal systems, especially in haze days. Meanwhile, a new correction technique was developed to estimate the effective reaction area and initial uptake coefficient of SO2 on the MgO aerosol surfaces. The significant results showed that the reactions of SO2 on the MgO aerosol surfaces in the system of SO2-MgO-dark could produce a small amount of sulfate and a large amount of sulfite and bisulfite, while in the systems of SO2-MgO-hν and SO2-MgO-O3 produce a large amount of sulfate and a small amount of sulfite and bisulfite. The impacts of temperature T and relative humidity RH on the sulfate formation on MgO aerosol surfaces showed a single-peak mode under the UV light condition, respectively. The sensitivities of these environmental factors to the sulfate aerosol formation were found to follow the order of RH > UV >T > O3 > SO2. The revised initial uptake coefficient γ0.REV of SO2 on the MgO aerosols was always between γ0.BET and γ0.GEO, and much closer to actual value. The heterogeneous reaction mechanisms of SO2 on the MgO aerosol surfaces in the different reaction systems were obviously different. In the presence of water, light irradiation and O3 exerted crucially significant roles in promoting sulfate heterogeneous formation. The various environmental factors in the different seasonal systems, especially in haze days, showed different synergistic effects on sulfate aerosol formations. The sulfate aerosol formations in haze days were mostly impacted by RH, T, O3, and SO2 in spring, RH in summer, RH, T, and SO2 in autumn, and RH and SO2 in winter. The study will provide significant scientific bases for understanding and controlling haze pollution formation. © 2021 Elsevier Ltd
关键词	Haze days Mineral aerosol Sensitive factors Sulfate aerosol Synergistic effect Uptake coefficient
语种	英语
scopus关键词	Aerosols; Magnesia; Minerals; Pollution control; Surface reactions; Environmental factors; Haze day; MgO; Mineral aerosols; Sensitive factor; SO$-2$; Sulphate aerosol; Sulphates; Synergistic effect; Uptake coefficients; Sulfur compounds; bisulfite; magnesium oxide; mineral; ozone; sulfate; sulfite; sulfur dioxide; surface water; water; aerosol formation; haze; humidity; laboratory method; light scattering; relative humidity; sulfate; sulfite; temperature profile; ultraviolet radiation; absorption; aerosol; Article; atmosphere; autumn; controlled study; correlation coefficient; data quality; environmental factor; haze; humidity; illumination; light; light intensity; meteorological phenomena; meteorology; pollution; pore size; priority journal; reaction analysis; reaction time; seasonal variation; simulation; spring; summer; synergistic effect; temperature; ultraviolet irradiation; ultraviolet radiation; winter
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/248492
作者单位	Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
推荐引用方式 GB/T 7714	Han L.,Liu X.,Chen Y.,et al. Key factors influencing the formation of sulfate aerosol on the surface of mineral aerosols: Insights from laboratory simulations and ACSM measurements[J],2021,253.
APA	Han L.,Liu X.,Chen Y.,Xiang X.,Cheng S.,&Wang H..(2021).Key factors influencing the formation of sulfate aerosol on the surface of mineral aerosols: Insights from laboratory simulations and ACSM measurements.ATMOSPHERIC ENVIRONMENT,253.
MLA	Han L.,et al."Key factors influencing the formation of sulfate aerosol on the surface of mineral aerosols: Insights from laboratory simulations and ACSM measurements".ATMOSPHERIC ENVIRONMENT 253(2021).