From the isotherm
plots, it was observed that adsorption curves reach a plateau after
equilibrium (Fig. 5). Increase in concentration increases the amount
adsorbed: 4.97 mmol/g (99.39%) to 76.80 mmol/g (43.60%) at 10 8C,
and 4.51 mmol/g (90.23%) to 58.90 mmol/g (29.45%) at 40 8C