(Stellenbosch : Stellenbosch University, 2013-12) Amikiya, Emmanuel Adoliwine; Banda, Mapundi K.; Stellenbosch University. Faculty of Science. Dept. of Mathematical Sciences.
ENGLISH ABSTRACT: Flow and reactive transport of chemical species is a very common phenomenon that occurs
in natural and artificial systems. However in this study, the topic is related to acid
mine drainage in the South African mining environment. Due to the hazards associated
with acid mine drainage, prevention or treatment of mine effluent water before discharging
to receiving waters and other environments is a necessity. A new time-dependent
mathematical model is developed for a passive treatment method, based on multi-scale
modelling of the coupled physico-chemical processes such as diffusion, convection, reactions
and filtration, that are involved in the treatment process. The time-dependent
model is simulated on a two-dimensional domain using finite volume discretization to
obtain chemical species distributions.