Research Article

Removal of Lead (II) Ions from Aqueous Solutions onto Activated Carbon Derived from Waste Biomass

Table 2

Thermodynamic parameters calculated from the Langmuir isotherm constant, , and activation energy calculated from the pseudo-second-order rate equation, k 2, for the adsorption of lead (II) ions onto the activated carbon (SAC2).

(K)
(kJ mol−1)
° 
(kJ mol−1)
° 
(kJ mol−1)
° 
(J K−1 mol−1)

298.15−0.74
308.159.02−0.999.4634.15
318.15−1.40