Ewha Womans University · Earth and Planetary Sciences
Professor Yong Pyo Kim's research lab specializes in atmospheric chemistry and environmental modeling, with a focus on the thermodynamics and gas-particle equilibrium of inorganic and organic aerosols. The lab develops and applies advanced computational models—such as SCAPE—to predict the phase partitioning, composition, and activity coefficients of atmospheric species, including secondary inorganic aerosols and hazardous air pollutants. Research also emphasizes the impact of policy on air quality, particularly in urban environments like Seoul, and investigates emerging pollutants such as nitrosamines and nitramines in fine particulate matter. The lab integrates experimental measurements with model validation to improve understanding of aerosol formation, transformation, and environmental health impacts.
Figures are computed from collected data and may differ slightly.
A rigorous and computationally efficient thermodynamic model that estimates the state and composition of atmospheric inorganic species between the gas and aerosol phases is presented. The estimation of important thermodynamic properties, equilibrium constants, ionic activity coefficients, water activity, and deliquescence points is described. Various sources and estimation methods for inorganic gas-liquid-solid equilibrium properties are compared and optimal approaches for the new equilibrium ro
The gas-aerosol equilibrium model, SCAPE, presented in Part I is used to evaluate the sensitivity of thermodynamic calculations of aerosol composition to common approximations and the choice of activity coefficient estimation method. The treatment of weak electrolytes, associated ammonia, NH3(aq), and bisulfate ion, HSO4 −, is analyzed. Comparisons of the three multi-component activity coefficient estimation methods are carried out with a variety of data. On the basis of the sensitivity analysis
Thermodynamics of the water-soluble crustal ionic species Ca²⁺, K⁺, and Mg²⁺ are added to that of those species already included (Na⁺, NH₄⁺, Cl⁻, NO₃⁻, and SO₄²⁻) in the gas-particle equilibrium model SCAPE (Kim et al., 1993ab) which estimates the state and composition of atmospheric inorganic species between the gas and aerosol phases. Thermodynamic properties for the aerosol species that include the above ions, equilibrium constants, ionic activity coefficients, water activity, and deliquescen
The trend of air pollutant concentrations in the Seoul Metropolitan Area (SMA)—particularly the city of Seoul—in the Republic of Korea, is shown and analyzed along with applied policy; furthermore, the remaining challenges are identified, and the direction of future research is discussed. The policies adopted from developed countries, notably, direct emission control measures, such as limiting the sulfur content in fuel and tightening emission standards, have been successful in reducing primary
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