Key Roles of Bulk Viscosity and Acidity on Liquid–Liquid Phase Separation of Atmospheric Organic–Inorganic Mixed Aerosols DOI

Yuanyuan Ye,

Jingyu Sun,

Younuo Fan

et al.

The Journal of Physical Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Liquid-liquid phase separation (LLPS) and the resulting particle morphologies in atmospheric organic-inorganic mixed aerosols are key regulators of aerosol chemistry climate forcing. However, influence coexisting viscous water-soluble organic compounds (WSOCs) on LLPS behavior complex multicomponent systems remains poorly understood. In this study, we introduced three representative WSOCs, i.e., sucrose (SUC), glycerol (GLY), citric acid (CA), to increase bulk viscosity a model system composed 1,2,6-hexanetriol (HXT) ammonium sulfate (AS). Using microscopic imaging techniques predictions, examined impact mass transfer limitations LLPS. As WSOC fractions increased, both relative humidity (SRH) efflorescence (ERH) progressively decreased. For HXT/AS/SUC HXT/AS/CA with molar ratios 1:1:0.5 1:1:0.75, was completely suppressed, although still occurred. 1:1:1 mixtures, neither nor observed. contrast, addition GLY caused minimal changes transitions due its minor effect aqueous-phase viscosity. Additionally, reducing acidity, along transformation CA into salts, alleviated molecular transport limitations, leading increased SRH ERH values for mixtures. These findings critical advancing high-resolution state modeling assessing implications presence or absence

Language: Английский

Key Roles of Bulk Viscosity and Acidity on Liquid–Liquid Phase Separation of Atmospheric Organic–Inorganic Mixed Aerosols DOI

Yuanyuan Ye,

Jingyu Sun,

Younuo Fan

et al.

The Journal of Physical Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Liquid-liquid phase separation (LLPS) and the resulting particle morphologies in atmospheric organic-inorganic mixed aerosols are key regulators of aerosol chemistry climate forcing. However, influence coexisting viscous water-soluble organic compounds (WSOCs) on LLPS behavior complex multicomponent systems remains poorly understood. In this study, we introduced three representative WSOCs, i.e., sucrose (SUC), glycerol (GLY), citric acid (CA), to increase bulk viscosity a model system composed 1,2,6-hexanetriol (HXT) ammonium sulfate (AS). Using microscopic imaging techniques predictions, examined impact mass transfer limitations LLPS. As WSOC fractions increased, both relative humidity (SRH) efflorescence (ERH) progressively decreased. For HXT/AS/SUC HXT/AS/CA with molar ratios 1:1:0.5 1:1:0.75, was completely suppressed, although still occurred. 1:1:1 mixtures, neither nor observed. contrast, addition GLY caused minimal changes transitions due its minor effect aqueous-phase viscosity. Additionally, reducing acidity, along transformation CA into salts, alleviated molecular transport limitations, leading increased SRH ERH values for mixtures. These findings critical advancing high-resolution state modeling assessing implications presence or absence

Language: Английский

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