Table 2: Pertinent parameters of the adsorption isotherm equations at 23 ± 2°C.

Temperature of ash The Langmuir isothermThe Freundlich isotherm
( g/g) (L/ g) n

300°C4.660.120.81668137.70.470.8983
500°C6.770.30.7651430.70.770.9274