Table 2 Adsorption kinetic parameters for ZnO-AC and GA@ZnO-AC performance towards MB dye.

Kinetic model	Parameters	ZnO-AC					GA@ZnO-AC
		Concentration (mg/L)					Concentration (mg/L)
		30	40	50	60	70	30	40	50	60	70
Pseudo-first order	qe exp (mg/g)	60	80	96.83	117.41	133.83	60	80	96.83	117.41	133.83
	qe cal (mg/g)	60.67	42.05	119.32	59.08	111.63	29.24	29.52	25.28	41.8	60.54
	K₁ (min^–1)	0.3813	0.169	0.2646	0.1207	0.1127	0.1787	0.1387	0.0837	0.0795	0.0841
	R²	0.8584	0.8582	0.8315	0.8298	0.9284	0.8231	0.6332	0.6511	0.8905	0.9361
	SSE	0.2735	15.493	9.1815	23.813	7.0219	12.558	20.608	29.21	30.868	29.921
Pseudo-second order	x²	0.0074	7.6624	4.2387	57.59	4.2257	39.003	86.322	202.51	136.77	88.725
	qe exp (mg/g)	60	80	96.83	117.41	133.83	60	80	96.83	117.41	133.83
	qe cal (mg/g)	60.24	80.65	101.01	121.95	142.86	60.24	80.65	100	120.48	140.85
	K₂ (g/mg. min)³	0.0306	0.0179	0.0084	0.0053	0.0024	0.029	0.023	0.0152	0.0074	0.0049
	R²	0.9999	0.9999	0.9998	0.9998	0.9994	0.9999	0.9999	0.9999	0.9999	0.9999
Intra-particle diffusion model	SSE	0.098	0.2654	1.7065	1.8534	3.6865	0.098	0.2654	1.2942	1.2533	2.8659
Intra-particle diffusion model	x²	0.001	0.0052	0.173	0.169	0.5708	0.001	0.0052	0.1005	0.0782	0.3499
Elovich’s Equation	h (mg/g. min^1/2)	111.12	116.28	85.471	78.748	47.857	105.24	149.26	151.5	107.53	98.04
	K_ipD (mg/g. min^1/2)	0.9923	1.35	2.7777	3.8613	6.379	0.8523	1.0028	1.1972	2.7494	4.0563
	C (mg/g)	50.258	66.453	72.416	81.392	75.857	51.441	69.854	87.518	92.074	99.135
	R²	0.4347	0.5564	0.5083	0.5549	0.6496	0.5788	0.6111	0.7228	0.5737	0.5185
	α (mg/g. min)	580.57	742.8	240.2	199.59	97.019	872.68	1550.8	2264.5	508.47	300.73
	β (g/mg)²	0.139	0.1052	0.0694	0.0548	0.0407	0.1483	0.1151	0.0942	0.0635	0.049
	R²	0.5431	0.5526	0.7044	0.7558	0.8701	0.5035	0.4748	0.461	0.6475	0.7168

Quick links

Search