Table 6.

Isotherm parameters for the adsorption behavior of various modified geopolymer cement mixes towards crystal Violet dye.

Isotherm parameter
Type of isotherm	Parameters	S	SMA6	SSF6
Langmuir	qmax (mg/g)	131.58	370.37	434.78
	kL (L/mg)	0.05	0.05	0.04
	RL	0.66	0.66	0.70
	R2	0.993	0.9882	0.9989
Freundlich	KF	12.20	21.42	21.50
	n	0.52	1.41	1.37
	R2	0.996	0.9963	0.9942