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

Table 1

Experimental variables and levels.

		Unit	Notation	Coded values
				−1	0	+1
Variables	Radiation power	Watt (W)	X1	2.00	4.00	6.00
	Radiation time	Minutes (min)	X2	364	490	616
Responses	DDT removal	%	Y1	—
	CSAC’s yield	%	Y2	—