Removal of aqueous carbamazepine using graphene oxide nanoplatelets: process modelling and optimization

Table 1 Experimental details and results obtained for RSM (CCD) based optimization of Carbamazepine (CBZ) adsorption by graphene oxide (GO)

Factors	Units	Levels			Star point α = 1.68
Factors	Units	Low (−1)	Central (0)	High (+ 1)	-α	+α
A: pH		4	6	8	5.32	8.68
B: Adsorbent dosage	g L^− 1	0.26	0.63	1.00	0.005	1.255
C: Time	min	60	90	120	40	141
Run	Factors			Predicted % CBZ removal	Experimentally recorded % CBZ removal
Run	A	B	C	Predicted % CBZ removal	Experimentally recorded % CBZ removal
1	8	1.00	120	52	52
2	2	1.00	120	99	99
3	6	0.63	90	78	78
4	6	0.26	120	52	51
5	4	0.63	90	74	73
6	6	0.63	90	78	77
7	4	1.00	60	70	70
8	8	0.26	120	47	47
9	6	0.63	140	60	61
10	6	0.63	90	78	78
11	6	0.63	39	49	48
12	8	0.26	60	63	62
13	8	1.00	60	68	69
14	6	0.01	90	34	35
15	6	0.63	90	78	78
16	4	0.26	60	23	24
17	6	1.25	90	78	77
18	6	0.63	90	78	78
19	9	0.63	90	68	69
20	6	0.63	90	78	78

ISSN: 2468-2039