Removal of Reactive Red 120 in a Batch Technique Using Seaweed-Based Biochar: A Response Surface Methodology Approach

Table 2

Comparison of RSM and experimental removal efficiency with residual errors.

Run order	A	B	C	D	Efficiency (%)		Residual error
					Experimental	RSM predicted
1	3	3	500	30	77.65	77.68	0.03
2	3	4	500	35	72.85	72.30	-0.55
3	2	3	500	35	77.10	76.06	-1.04
4	2	4	750	35	68.50	68.25	-0.25
5	2	3	750	30	73.30	73.72	0.42
6	1	3	500	30	67.15	66.96	-0.19
7	2	4	250	35	73.53	73.36	-0.16
8	1	2	500	35	71.23	71.99	0.76
9	2	3	750	40	73.75	74.05	0.30
10	2	3	250	30	78.33	78.23	-0.09
11	2	2	500	30	78.70	78.56	-0.14
12	2	2	750	35	75.40	75.29	-0.11
13	2	3	500	35	78.12	78.10	-0.02
14	3	2	500	35	79.75	79.16	-0.59
15	2	2	250	35	81.62	81.60	-0.02
16	1	3	750	35	63.85	63.10	-0.75
17	3	3	750	35	74.35	74.74	0.39
18	1	4	500	35	63.50	64.30	0.80
19	1	3	250	35	68.88	68.55	-0.33
20	2	4	500	40	72.25	72.45	0.20
21	2	3	500	35	79.20	80.26	1.06
22	1	3	500	40	67.60	67.30	-0.30
23	2	2	500	40	79.85	79.95	0.10
24	2	4	500	30	71.80	71.77	-0.03
25	3	3	250	35	81.23	82.04	0.81
26	3	3	500	40	78.10	78.01	-0.09
27	2	3	250	40	78.78	78.57	-0.21