Department of Earth Sciences, University of Bristol
Environmental Geochemistry
Prof. D.M. Sherman
Lecture 2: Oxidation-Reduction Equilibria
Overview
Several geochemically important elements (S, O, C, N, Fe, Mn) can exist in more than one oxidation state over the
range of conditions in the Earth's crust.
Oxidation-reduction equilibria are the primary means by which biological processes interact with geochemistry.