[Retracted] Optimization of Remazol Black B Removal Using Biochar Produced from Caulerpa scalpelliformis Using Response Surface Methodology

Table 3

Experimental and predicted responses of BBD with residual error.

	A	B	C	D	Yield (%)		Residuals
Run order	Biochar dosage (g/L)	Equilibrium pH	Initial dye concentration (mmol/L)	Temperature (^oC)	Experiment	RSM
1	4	2	0.25	35	80.30	79.97	0.333
2	4	2	0.75	35	74.15	74.82	−0.667
3	2	3	0.75	35	71.10	70.43	0.667
4	4	3	0.50	35	76.60	76.60	0.000
5	6	3	0.50	45	77.80	78.30	−0.500
6	4	4	0.50	45	71.10	70.77	0.333
7	4	3	0.25	25	76.75	76.42	0.333
8	4	2	0.50	45	79.25	78.92	0.333
9	2	4	0.50	35	69.90	69.73	0.167
10	4	4	0.50	25	69.40	69.07	0.333
11	4	3	0.50	35	76.60	76.60	0.000
12	2	2	0.50	35	78.05	77.88	0.167
13	2	3	0.25	35	77.25	78.58	−1.333
14	6	3	0.75	35	77.70	75.70	2.000
15	4	3	0.75	45	72.30	72.97	−0.667
16	4	3	0.25	45	78.45	78.12	0.333
17	4	3	0.50	35	76.60	76.60	0.000
18	2	3	0.50	25	74.50	74.33	0.167
19	4	4	0.75	35	66.00	66.67	−0.667
20	2	3	0.50	45	76.20	76.03	0.167
21	6	2	0.50	35	79.65	80.15	−0.500
22	4	4	0.25	35	72.15	71.82	0.333
23	6	3	0.25	35	77.85	77.85	0.000
24	4	2	0.50	25	77.55	77.22	0.333
25	6	4	0.50	35	71.50	72.00	−0.500
26	6	3	0.50	25	76.10	76.60	−0.500
27	4	3	0.75	25	70.60	71.27	−0.667