气候变化领域集成服务门户(CCPortal): Viscosity and phase state of aerosol particles consisting of sucrose mixed with inorganic salts

CCPortal

DOI	10.5194/acp-21-10215-2021
	Viscosity and phase state of aerosol particles consisting of sucrose mixed with inorganic salts
	Song Y.-C.; Lilek J.; Lee J.B.; Chan M.N.; Wu Z.; Zuend A.; Song M.
发表日期	2021
ISSN	1680-7316
起始页码	10215
结束页码	10228
卷号	21 期号:13
英文摘要	Research on the viscosity and phase state of aerosol particles is essential because of their significant influence on the particle growth rate, equilibration times, and related evolution of mass concentration as well as heterogeneous reactions. So far, most studies of viscosity and phase state have been focused on organic aerosol particles, yet data on how viscosity can vary when the organic materials are mixed with inorganic salts remain scarce. Herein, using bead-mobility and poke-and-flow techniques, we quantified viscosities at 293 ± 1 K for binary mixtures of organic material = H2O and inorganic salts = H2O, as well as ternary mixtures of organic material = inorganic salts = H2O over the atmospheric relative humidity (RH) range. Sucrose as the organic species and calcium nitrate (Ca.NO3/2) or magnesium nitrate (Mg.NO3/2) as the inorganic salts were examined. For binary sucrose = H2O particles, the viscosities gradually increased from ∼ 3 × 10-2 to × 108 Pas as RH decreased from ∼ 75 % to ∼ 25 %. Compared with the results for the sucrose = H2O particles, binary Ca.NO3/2 =H2O and Mg.NO3/2 =H2O particles showed drastic enhancements to 1 × 108 Pas at low RH close to the efflorescence RH. For ternary mixtures of sucrose = Ca.NO3/2 = H2O or sucrose = Mg.NO3/2 = H2O, with organic-to-inorganic mass ratios of 1 V 1, the viscosities of the particles gradually increased from ∼ 3 × 10-2 to greater than ∼ 1 × 108 Pas for RH values from ∼ 75 % to ∼ 5 %. Compared to the viscosities of the Ca.NO3/2 =H2O particles, higher viscosities were observed for the ternary sucrose = Ca.NO3/2 = H2O particles, with values increased by about 1 order of magnitude at 50 % RH and about 6 orders of magnitude at 35 % RH. Moreover, we applied a thermodynamics-based groupcontribution model (AIOMFAC-VISC, Aerosol Inorganic Organic Mixtures Functional groups Activity Coefficients Viscosity) to predict aerosol viscosities for the studied systems. The model predictions and viscosity measurements show good agreement within ∼ 1 order of magnitude in viscosity. The viscosity measurements indicate that the studied mixed organic inorganic particles range in phase state from liquid to semi-solid or even solid across the atmospheric RH range at a temperature of 293 K. These results support our understanding that organic = inorganic = H2O particles can exist in a liquid, semisolid, or even a solid state in the troposphere. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; inorganic salt; relative humidity; sucrose; viscosity
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246751
作者单位	Department of Earth and Environmental Sciences, Jeonbuk National University, Jeonju, South Korea; The Earth and Environmental Science System Research Center, Jeonbuk National University, Jeonju, South Korea; Department of Atmospheric and Oceanic Sciences, McGill University, Montréal, QC, Canada; Innovative System Safety Research Division, Korea Atomic Energy Research Institute, Daejeon, South Korea; Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, Hong Kong; The Institute of Environment Energy, and Sustainability, The Chinese University of Hong Kong, Hong Kong, Hong Kong; Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China; Department of Environment and Energy, Jeonbuk National University, Jeonju, South Korea
推荐引用方式 GB/T 7714	Song Y.-C.,Lilek J.,Lee J.B.,et al. Viscosity and phase state of aerosol particles consisting of sucrose mixed with inorganic salts[J],2021,21(13).
APA	Song Y.-C..,Lilek J..,Lee J.B..,Chan M.N..,Wu Z..,...&Song M..(2021).Viscosity and phase state of aerosol particles consisting of sucrose mixed with inorganic salts.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(13).
MLA	Song Y.-C.,et al."Viscosity and phase state of aerosol particles consisting of sucrose mixed with inorganic salts".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.13(2021).