Table 4.

Pseudo-first-order and pseudo-second-order kinetic parameters for the adsorption of Acid Red 27 on ACC (C₀: mg·L⁻¹; q_e: mg·g⁻¹; k₁: min⁻¹; k₂: g·mg⁻¹·min⁻¹; r₀: mg·g⁻¹·min⁻¹).

C0	qe,exp	PFO				PSO
		k1 × 103	qe,cal	R 2	ARE	k2 × 105	qe,cal	r 0	R 2	ARE
25	35.5	1.85	32.4	0.993	0.35	9.21	37.6	0.130	0.997	0.16
50	63.9	1.05	60.5	0.991	0.27	2.24	71.2	0.113	0.997	0.07
75	102.5	0.79	94.0	0.976	0.37	1.80	109.1	0.215	0.982	0.22
100	119.6	0.67	105.8	0.982	0.69	0.94	134.0	0.169	0.987	0.37
150	143.5	1.05	122.7	0.994	0.52	1.94	153.1	0.454	0.995	0.21
200	144.7	1.14	137.2	0.994	0.26	1.10	163.6	0.294	0.999	0.13