Removal of Acid Red 88 Using Activated Carbon Produced from Pomelo Peels by KOH Activation: Orthogonal Experiment, Isotherm, and Kinetic Studies

Table 1

Levels of parameters in an orthogonal experiment.

Levels	Parameters
	Activation temperature A (°C)	Activation time B (min)	Impregnation ratio C
Level 1	650	90	1.0 : 1
Level 2	700	120	1.5 : 1
Level 3	750	150	2.0 : 1
Level 4	800	180	2.5 : 1