Statistical Modeling and Kinetic Studies on the Adsorption of Reactive Red 2 by a Low-Cost Adsorbent: Grape Waste-Based Activated Carbon Using Sulfuric Acid Activator-Assisted Thermal Activation

Table 2

Experimental conditions for adsorption process in the presence of prepared GWAC.

Run no.	Parameters				Response
	Contact time	pH	Adsorbent dosage	Dye concentration	Removal (%)
1	10	11	12.25	100	38.9
2	90	3	12.25	100	96.83
3	10	3	12.25	500	9.8
4	50	7	3.25	300	70.6
5	10	3	0.25	500	2
6	90	3	12.25	500	63.4
7	10	3	0.25	100	25
8	90	11	0.25	100	33.66
9	50	7	6.25	400	67.9
10	90	3	0.25	500	1.33
11	10	11	12.25	500	11.6
12	50	9	6.25	300	81.06
13	50	5	6.25	300	89
14	90	11	0.25	500	1.73
15	50	7	6.25	200	80
16	30	7	6.25	300	78.96
17	10	11	0.25	100	22
19	90	11	12.25	500	61.33
19	10	11	0.25	500	0.53
20	50	7	9.25	300	85.53
21	70	7	6.25	300	89.53
22	90	3	0.25	100	37.66
23	10	3	12.25	100	41
24	90	11	12.25	100	93.5
25	50	7	6.25	300	52.6
26	50	7	6.25	300	85
27	50	7	6.25	300	85.3
28	50	7	6.25	300	84.3
29	50	7	6.25	300	83.6
30	50	7	6.25	300	84.4