Broadly, I am interested in the use of reactive transport modeling to better utilize water resources. To me this means understanding the fundamental processes that determine transport behavior of aqueous systems. I do this by coupling experiments and models of simplified settings to gain insights into real world problems.
Salinity is an increasingly prescient issue in groundwater systems, from seawater intrusion, to produced water disposal. Acidity and salinity are coupled through electrostatic interactions at the mineral surface. This work seeks to understand this phenomenon in order to determine the impact of salinity changes on water quality in groundwater systems.
Acidity is a fundamental control of most aqueous systems, yet little is known about how hydrogen moves in natural settings, such as groundwater. This work analyzes how aqueous protons interact with mineral surfaces, and how this interaction controls transport behavior.
Heavy Metal Transport
Groundwaters laden with heavy metals impacts the lives of millions of people around the globe. Improved techniques for remediation are needed. This work explores the use of acidity and redox chemistry to im/mobilize metals in engineered and natural media such as iron oxides and silica sands.
Robust Chemical Solvers
The solution of chemical systems is made difficult by the complexity of their form and the wide range of values concentrations can reasonably take. This work seeks to create a robust solver of arbitrary chemical systems, using automatic differentiation, variable transformation, and a priori bounds on variable values.