Calcium Pretreated Hevea brasiliensis Sawdust for Copper Removal: Batch and Column Study

Table 2

Kinetic characterization of the copper adsorption onto CaHBSW.

Kinetic model	Mathematical equation and references	Notations	Plot	Results
Pseudo-first	[26]	: adsorption capacity at time (mg/g), : adsorption capacity at equilibrium (mg/g), and : pseudo-first-order rate constant (min^−1)	Figure 13	(mg/g); (min^−1)	29.95; 0.042; 0.975
Pseudo-second	[27]	: pseudo-second-order rate constant (g mg^−1 min^−1), : maximum adsorption capacity at equilibrium (mg/g), and : adsorption capacity at time (mg/g)	Figure 14	(mg/g); (g mg^−1 min^−1)	32.26; 0.003; 0.995
Intraparticle diffusion	[28]	: intraparticle diffusion constant (mg g^−1 min^−1) and : intercept	Figure 15	(mg g^−1 min^−1)	2.41; 3.628; 0.914