Hypothesis: The purpose of the present work is the development of a kinetic model for the adsorption of
As(III) and As(V) onto tetravalent manganese feroxyhyte (d-Fe0.75Mn0.25OOH), which have been recently
proved to be very efficient adsorbent for the particular species.
Experiments: In this respect equilibrium and adsorption kinetic experiments onto this type of adsorbent
for As(III) and As(V) were performed. Two sizes of adsorbate particles are tested in order to acquire better
insight to the adsorption process.
Results: The adsorption kinetic curves cannot be described by the well-known adsorption kinetic models
so a detailed model that takes into account the structure of the adsorbent particle is developed. The
model parameters were extracted by the requirement of agreement between model and experimental
results. The batch model developed here is necessary for the development of models for fixed bed adsorption
devices in order to exploit the commercial prospects of the particular adsorbent. This work constitutes
the first attempt of kinetic study and adsorption model development for the specific very promising
adsorbent