Table 3. Parameters of Different Kinetic Model Fittings for CR Adsorption onto DAC and c-DAC.

kinetic model	equation	parameters		DAC	c-DAC
–	–		qe,exp (mg/g)	36.00	177.16
pseudo-first-order	ln(qe – qt) = ln qe – K1t		qe,1 (mg/g)	11.25	2.91
			K1	7.44 × 10–3	1.99 × 10–3
			R2	0.97	0.84
pseudo-second-order			qe,2 (mg/g)	35.44	175.65
			K2	2.03 × 10–3	5.07 × 10–3
			R2	0.999	1.000
intraparticle diffusion	qt = Kid (t)0.5 + Ci	step 2	Kid	1.28	0.51
			Ci	20.43	169.80
			R2	0.97	0.82
		step 3	Kid	0.51	0.13
			Ci	25.25	172.35
			R2	0.95	0.83