Application of Electroanalytical Methods to Investigate Biogeochemical Processes from Global to Molecular Scales

Electroanalytical methods are widely applicable in a variety of scientific fields and have proven to be a useful tool for fundamental and applied scientific investigations involving redox reactions and species. Over the past decades, electrochemical methods have been increasingly applied to investigate environmental processes. Environmental applications of electrochemistry range from large-scale environmental monitoring to bench-top investigations of fundamental processes at a micro-scale. This dissertation primarily applies two analytical techniques, voltammetry and mediated electrochemical oxidation (MEO), to directly investigate in situ redox cycling in estuarine and lacustrine environments, and to probe iron complexation and redox dynamics with organic ligands in a controlled laboratory setting.