The adsorption studies were carried out in a 2 L Erlenmeyer
flask. The methylene blue solution was prepared with deionized
water. The adsorption of methylene blue by DAB was investigated
for the initial dye concentration range 1-5 mg/L at adsorbent dose
of 1 g L1
. The concentrations of dye and the dose of adsorbent
were chosen based on earlier studies with similar system (Tsai
et al., 2011). The initial pH of the dye solution was adjusted to
7.0 by using dilute HCl solution.