shows the adsorption isotherms of Pb2+ on FeAA at
288, 308 and 318 K. Equilibrium data can be analyzed using
commonly known adsorption isotherms, which provide the basis
for the design of adsorption systems. The most widely used
isotherm equation for modelling of the adsorption data is the
Langmuir equation, which is valid for monolayer sorption onto
a surface with a finite number of identical sites and is given