Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer

Table 3

Parameters of kinetics models for the adsorption of MB on the geopolymer.

Condition	qex (mg/g)	Pseudo-first-order			Pseudo-second-order			Intraparticle diffusion
		k1 (min^−1)	qe (mg/g)	R^2	k2 (g/(mg min))	qe (mg/g)	R^2	kp (mg/(g min^1/2))	I	R^2
Without UV	15.18	0.008	5.94	0.78	0.004	15.51	0.99	0.118	12.60	0.88
With UV	15.20	0.011	2.59	0.70	0.020	15.28	0.99	0.047	14.30	0.67