Adsorption of Cu(II) and Zn(II) onto Activated Carbon from Oil Palm Empty Fruit Bunch Prepared by Two-Step Acid Treatment and Microwave-Assisted Pyrolysis

Table 3

Kinetic model parameters of Cu(II) and Zn(II) onto EFB and 2ACEFB.

Kinetic model	Parameters	Adsorbent-adsorbate
		EFB-Cu	2ACEFB-Cu	EFB-Zn	2ACEFB-Zn
Pseudo-first-order model	(min^-1); (mg/g)	0.0584; 8.63; 0.974	0.0584; 8.57; 0.974	0.0417; 8.13; 0.960	0.0533; 8.45; 0.962
Pseudo-second-order model	(min^-1); (mg/g)	0.0094; 9.26; 0.998	0.0138; 9.12; 0.999	0.0109; 8.47; 0.998	0.0102; 9.22; 0.998