Abstract
Arsenic (As) contamination of groundwater has become problem in the world. Although we know that anaerobic environments often promote arsenic release and mobilization from the solid phase, the precise mechanism remains unresolved because of complexity by the combination of several factors such as microbial activity and geochemical factors. In this study, two-dimensional transport model was developed for arsenic mobilization with microbiological redox mechanism. This model calculates the mass transport, bacteria mediated bio-chemical reducing processes, iron precipitation and Fe-As adsorption and desorption process in the three phases (BIO-, MOBILE- and MATRIX-PHASE). Results from a 2D-flow soil experiment were used to verify the simulation results of this model. This study showed the potential that this model could be more useful by evaluating issues such as interpretation of chemical evolving processes at field.
