Adsorption & Diffusion
Animation showing the temperature dependence of gas particle adsorption onto rock/soil walls within a fracture or pore.
Copyright © John P. Ortiz 2022.
Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. As a result, adsorption is a process that retards contaminant transport through porous media, so it is important for us to understand for a variety of applications.
Highlighted Works
Articles
Ortiz, J. P., Neil, C. W., Rajaram, H., Boukhalfa, H., & Stauffer, P. H. (2025). Preferential adsorption of noble gases in zeolitic tuff with variable saturation: A modeling study of counter-intuitive diffusive-adsorptive behavior. Journal of Environmental Radioactivity. 282, 107608. doi:10.1016/j.jenvrad.2024.107608.
Neil, C. W., Boukhalfa, H., Xu, H., Ware, S. D., Ortiz, J., Avendaño, S., Harp, D. R., Broome, S., Hjelm, R. P., Brug, W. P., & Stauffer, P. H. (2022). Gas diffusion through variably-water-saturated zeolitic tuff: Implications for transport following a subsurface nuclear event. Journal of Environmental Radioactivity, 250, 106905.
Harp, D. R., Ortiz, J. P., Pandey, S., Karra, S., Anderson, D., Bradley, C., Viswanathan, H., & Stauffer, P. H. (2018). Immobile pore-water storage enhancement and retardation of gas transport in fractured rock. Transport in Porous Media, 124(2), 369-394.
Posters
Ortiz, J. P. (2019). Noble gas diffusion through variably-saturated rock: implications for verification of subsurface nuclear events. LANL Student Symposium.