IWA Publishing

Table 2

Adsorption kinetics and correlation coefficient

Dose mg	PH	C₀mg/L	Pseudo-first-order ln (q_e–q_t) vs time (t)		Pseudo-second-order (t/q_t vs t)		Intraparticle (q_t vs t^0.5)
Dose mg	PH	C₀mg/L	Experimental R²	NARX output R²	Experimental R²	NARX outputs R²	Experimental R²	NARX outputs R²
20	3	1	0.8925	0.9052	0.9973	0.9979	0.7471	0.7172
20	8	1	0.5483	0.5997	0.9983	0.9988	0.6496	0.6244
20	3	3	0.656	0.6819	0.9711	0.963	0.7931	0.7311
20	5.5	3	0.7858	0.7017	0.9562	0.9897	0.6775	0.6884
30	5.5	3	0.8939	0.8682	0.9978	0.9909	0.5338	0.5848
30	8	3	0.6758	0.6069	0.9905	0.9945	0.7542	0.795
30	3	1	0.756	0.7888	0.9994	0.9974	0.5921	0.5229
30	5.5	1	0.8102	0.8608	0.9999	0.9994	0.674	0.6838

Dose mg	PH	C₀mg/L	Pseudo-first-order ln (q_e–q_t) vs time (t)		Pseudo-second-order (t/q_t vs t)		Intraparticle (q_t vs t^0.5)
Dose mg	PH	C₀mg/L	Experimental R²	NARX output R²	Experimental R²	NARX outputs R²	Experimental R²	NARX outputs R²
20	3	1	0.8925	0.9052	0.9973	0.9979	0.7471	0.7172
20	8	1	0.5483	0.5997	0.9983	0.9988	0.6496	0.6244
20	3	3	0.656	0.6819	0.9711	0.963	0.7931	0.7311
20	5.5	3	0.7858	0.7017	0.9562	0.9897	0.6775	0.6884
30	5.5	3	0.8939	0.8682	0.9978	0.9909	0.5338	0.5848
30	8	3	0.6758	0.6069	0.9905	0.9945	0.7542	0.795
30	3	1	0.756	0.7888	0.9994	0.9974	0.5921	0.5229
30	5.5	1	0.8102	0.8608	0.9999	0.9994	0.674	0.6838