Pumice Characteristics and Their Utilization on the Synthesis of Mesoporous Minerals and on the Removal of Heavy Metals

Table 4

Kinetic parameters of sorption for the metal ions onto zeolite at 25°C.

Metal	Pseudo-first-order				Pseudo-second-order
	(mg/g)	(mg/g)	(min^−1)		(mg/g)	(g/mg min)
Co^+2	61.60	10.06	−0.3705	0.8357	61.95	0.2326	0.9999
Cu^+2	75.50	10.24	−0.6458	0.8170	77.57	0.1123	0.9994
Fe^+2	76.50	16.76	−0.5954	0.7651	80.05	0.0274	0.9999
Cd^+2	97.80	35.45	−0.7452	0.8337	98.32	0.2650	1