Bacteria-mediated Reduction and Precipitation of Fe(OH)3 and FeS in the Subsurface of a Coastal Aquifer: A Numerical Investigation

A mathematical model is developed to simulate the reduction processes and precipitation of Fe(OH)3 and FeS in an unconfined coastal aquifer. The available measured data of the selected aquifer shows that the saltwater region of the coastal aquifer is highly reduced. Mn2+, Fe2+ and HS− have been formed in the reduced saltwater region of the aquifer as a result of the bacteria-mediated reduction of MnO2, Fe(OH)3 and SO $$_{4}^{\ \ 2-}$$