The metal concentration were analysed before and after the experiment using Atomic Absorption Spectrophotometer
(AAS). Figure 1 represents the schematic diagram for the experimental procedure for obtaining equilibrium data. A
simple preliminary sorption kinetics test established the exposure time necessary for the given sorbent particles to reach
the equilibrium state characterized by the unchanging sorbate concentration in the solution. This was determined by
time-based analysis. Enough time was allowed for the sorption system to reach equilibrium.