3.4. Effects of adsorbent dosage
Percentage adsorbed was observed to increase as the adsorbent dosage increased and equilibrium was attained after
adsorbent dosage of 2 g/L (Fig. 6). Percentage adsorbed increased from 85.19% for adsorbent dosage of 1 g/L to 88.88% for
adsorbent dosage of 2 g/L. Increase in percentage adsorbed with increase in adsorbent dosage between 1 g/L and 2 g/L may
be as a result of increase in the available adsorption sites. Only about 3% increase was observed as adsorbent dosage was
increased from 1 g/L to 2 g/L, overlap of adsorption sites may account for the small increase in percentage adsorption.
However, saturation viz-à-viz aggregation on adsorption site results into equilibrium after 2 g/L dosage (Fig. 7).