Synthetic and application of a novel resin from waste foam packing for adsorption of Acid Orange 67 from aqueous solution

Bulletin of the National Research Centre

Table 1 Summary of the constants of different kinetic models for adsorption of AO67onto RPSF at different concentrations and different temperatures

Constants	Initial dye concentration (mg/L)			Temperature (°C)
	50	100	150	25	40	60
q_e exp., mg/g	18.8	20.4	22.4	23.41	23.92	28.31
Pseudo-first-order kinetics
K_1, min⁻¹	0.0129	0.0297	0.0166	0.0288	0.0216	0.02
q_ecal, mg/g	5.04	18.59	18.59	18.22	12.78	13.092
R²	0.9031	0.8642	0.9044	0.901	0.909	0.924
Pseudo-second-order kinetics
k₂, g/mg min	0.019	0.012	2.3 × 10⁻³	0.0027	0.0065	0.0073
H	7.22	6.18	1.75	1.88	4.1	6.24
q_ecal, mg/g	19.49	22.68	27.55	26.39	25.126	29.24
R²	0.9985	0.9994	0.9809	0.9712	0.9938	0.998
Elovich Constant
Α	19.94 × 10⁴	142.6	5.69	5.66	33.29	40.8
Β	0.882	0.412	0.2	0.1994	0.275	0.2278
R²	0.8524	0.8686	0.832	0.8357	0.900	0.9083
Bingham^’s Constant
Α	0.0046	0.0052	0.0066	0.01	0.0071	0.0087
K₀	487.2	469.35	460.74	460.8	468.1	470
R²	0.904	0.902	0.9182	0.917	0.9227	0.9274
Intra-particle diffusion model
k_diff1	0.479	1.65	1.660	1.664	1.574	2.634
R²	0.8955	0.8928	0.6531	0.6531	0.8256	0.9319
k_diff2	0.4915	0.6128	1.27	1.27	1.35	1.46
R²	0.9004	0.8903	0.8519	0.8519	0.9398	0.689