Table 5. Equilibrium Parameters of Langmuir and Freundlich Isotherms for CV and CR Dye Uptake onto CDA.

isotherm	parameters	CV dye	CR dye
Langmuir	R2	0.986	0.984
	KL (L/mg)	0.014	0.012
	Qm (mg/g)	283.18	195.06
	RL	0.152 ≤ RL ≤ 0.781	0.172 ≤ RL ≤ 0.806
Freundlich	R2	0.937	0.948
	nf	1.41	1.43
	Kf (mg/g) · (mg/L)−1/nf	5.79	3.63