3.4. Effect of adsorbent dose The adsorption of dye on MAC was studied by changing the quantity of adsorbent range of 0.005-0.025 g. With the dye concentration of 70 mg L , room temperature (25 + 1 'C), and pH of 2.0. It is evident (Fig. 7) that the efficiency did not increase linearly with the increase in the adsorbent dosage. As reported [29], with the increases in adsorbent dosage the percentage adsorption also increases up to 99.4% at 0.02 g for for 70 mg L dye solution. After that, even though the adsorbent dosage increases in the