My research interests center around topics related to surface and interfacial interactions in complex natural and engineered environmental systems.  Areas of particular interest include physical-chemical interactions in complex systems, behaviors in unsaturated soils/multiple-phase systems, and numerical model development for prediction and design in complex systems.

Topics of some of my current and previous projects have included:

  • Machine learning for environmental applications
  • Source allocation of per- and polyfluoroalkyl substances (PFAS) in environmental samples
  • Nanoparticle interactions with biological surfaces
  • Transport in capillary-held water films on grain surfaces
  • The effect of phase change on mobility in the vadose zone
  • Environmentally-benign surfactant-based bio-oil extraction
  • Dynamic capillary effects in unsaturated porous media
  • Detection of endocrine disrupting chemicals in environmental media
  • Accumulation and release of nanomaterials in the unsaturated zone
  • Surfactant mixtures in complex systems

Images from some of my recent publications are below.

Amine-modified fluorescent nanospheres attached to a lettuce plant root. (Kibbey and Strevett, Chemosphere, 2019, 221, 703-707.)
Calculated capillary held water film configurations on a sand grain surface at three different capillary pressures. (Kibbey, Water Resources Research, 201349, doi:10.1002/wrcr.20383.)
Precipitation of salt on the ridges of a sand grain as a result of evaporation. (Adegbule, Yan, Papelis and Kibbey. Colloids and Surfaces A, 2018, 548, 134-141.)
Deposition of nanomaterials on surfaces in a grain cluster experiencing evaporation. (Yan and Kibbey, Journal of Contaminant Hydrology, 2019, 226, 103524.)
Machine learning identification of shadows in scanning electron microscope (SEM) images. (Yan, Adegbule and Kibbey, Ultramicroscopy, 2019, 197, 122-128.)
Hysteretic capillary pressure-saturation relationship measured for a fine sand. (Chen, Miller and Kibbey, ASTM Geotechnical Testing Journal, 2007, 30, GTJ100850.)