Single-Stage Microwave-Assisted Coconut-Shell-Based Activated Carbon for Removal of Dichlorodiphenyltrichloroethane (DDT) from Aqueous Solution: Optimization and Batch Studies

Table 3

Complete experimental design matrix for CSAC’s preparation.

Run	CSAC’s preparation variables		Responses
	Radiation power, X1 (Watt)	Radiation time, X2 (min)	DDT removal, Y1 (%)	CSAC’s yield, Y2 (%)
1	490.00 (0)	2.00 (−1)	74.11	41.88
2	490.00 (0)	4.00 (0)	82.45	39.83
3	490.00 (0)	6.00 (+1)	85.66	38.13
4	490.00 (0)	4.00 (0)	80.72	33.34
5	616.00 (+1)	6.00 (+1)	92.53	18.25
6	616.00 (+1)	4.00 (0)	89.45	16.17
7	490.00 (0)	4.00 (0)	80.11	36.41
8	490.00 (0)	4.00 (0)	81.36	40.12
9	364.00 (−1)	2.00 (−1)	60.54	43.24
10	364.00 (−1)	6.00 (+1)	63.59	39.38
11	490.00 (0)	4.00 (0)	78.96	35.29
12	616.00 (+1)	2.00 (−1)	83.15	35.30
13	364.00 (−1)	4.00 (0)	64.22	28.14