The effect of initial contact time on Peanut shells coated with polyaniline adsorption is shown in Fig. 2
which indicates that the sorption increased for increasing contact time and remained constant.
Equilibrium was reached after about 15 min of contact time and the curves show that the adsorption occurred in two stages: a first rapid step followed by a much slower one
leading to a high OTC adsorption percentage of 79.11%