The parameters calculated from isotherm models for the adsorption of MB over VNU-23.

Isotherms	Paramaters	Value
Langmuir	q m (mg g−1)	2000
	K L (L mg−1)	0.011
	R 2	0.999
Freundlich	1/n	0.230
	K F (mg g−1 (L g−1)1/n)	433.2
	R 2	0.975
Temkin	b	7.805
	k T (L mg−1)	0.558
	R 2	0.967
DR	C (mol2 J2)	3 × 10−5
	k DR (mg g−1)	1623.6
	R 2	0.755