The application of Rumex abyssinicus based activated carbon for Brilliant Blue Reactive dye adsorption from aqueous solution

Table 2 Independent variables and their corresponding levels

Variables	Units	Low (–)	Middle (0)	High (+)
pH	–	2	6	10
Dye concentration	mg/L	50	100	150
Adsorbent dosage	g/100 mL	0.05	0.1	0.15
Contact time	min	20	50	80

ISSN: 2661-801X