Predicted and experimental responses of CV and MB removal by NCC–CH hydrogel beads.

Run	A a	B a	C a	D a	CV-Removal efficiency (%)		MB-Removal efficiency (%)
					Experimentalb	Predicted	Experimentalb	Predicted
1	60	0.1	5	7	93.21 ± 0.88	93.18	77.16 ± 0.73	76.82
2	30	0.5	5	5	88.98 ± 0.71	89.16	89.21 ± 0.71	90.73
3	60	0.5	4	5	91.46 ± 0.95	91.53	90.66 ± 0.94	90.94
4	60	0.5	5	9	92.60 ± 0.48	92.54	85.87 ± 0.45	86.29
5	30	0.1	5	5	91.94 ± 1.04	91.84	93.69 ± 1.06	92.28
6	15	0.5	3	5	87.77 ± 1.16	87.54	91.60 ± 1.21	91.21
7	15	0.1	3	7	89.55 ± 1.60	89.17	84.18 ± 1.51	83.35
8	60	0.1	1	5	93.86 ± 1.32	93.82	90.33 ± 1.27	90.67
9	37.5	0.3	3	7	90.84 ± 0.94	90.98	90.35 ± 0.94	90.15
10	37.5	0.3	3	7	91.13 ± 0.47	90.98	93.76 ± 0.49	93.42
11	15	0.5	5	7	86.73 ± 0.82	86.69	91.60 ± 0.86	90.51
12	15	0.3	5	9	88.43 ± 1.17	88.43	89.24 ± 1.18	88.90
13	37.5	0.3	3	7	91.07 ± 0.95	90.98	88.07 ± 0.91	86.89
14	45	0.5	1	7	92.63 ± 1.12	92.64	95.11 ± 1.15	96.23
15	15	0.5	2	9	89.41 ± 0.91	89.47	93.08 ± 0.95	93.22
16	45	0.1	4	9	92.49 ± 0.48	92.57	91.28 ± 0.47	91.42
17	15	0.3	1	5	90.28 ± 0.72	90.31	88.84 ± 0.71	88.76
18	30	0.5	1	5	91.30 ± 0.86	91.47	90.33 ± 0.85	91.28
19	37.5	0.3	3	7	90.96 ± 1.28	90.98	86.78 ± 1.22	88.35
20	60	0.3	1	9	93.74 ± 1.24	93.85	87.02 ± 1.15	87.11
21	60	0.5	1	5	93.15 ± 1.46	93.00	92.27 ± 1.45	91.32
22	37.5	0.3	3	7	91.02 ± 0.73	90.98	89.24 ± 0.72	89.73
23	30	0.1	1	9	92.93 ± 0.95	92.73	83.44 ± 0.85	83.13
24	15	0.1	3	7	88.59 ± 1.25	89.17	75.73 ± 1.07	75.68
25	45	0.1	4	9	92.55 ± 0.96	92.57	85.91 ± 0.89	86.37

^a A – initial dye concentration (mg L⁻¹), B – adsorbent dosage (g), C – contact time (h), D – pH.

^bValues next to ± are standard error of 3 replicates.