Figure 3

Effect of (a) time, (b) adsorbent dose, (c) initial dye concentration, (d) temperature on dye I adsorption onto PAC. (Adsorption conditions: (a): initial dye concentration: 5 mg L−1; adsorbent dosage: 4 g L−1; temperature: 295 K, (b): initial dye concentration: 5 mg L−1; contact time: 60 min; temperature: 295 K, (c): contact time: 60 min; adsorbent dosage: 4 g L−1; temperature: 295 K, (d): initial dye concentration: 5 mg L−1; contact time: 60 min; adsorbent dosage: 6 g L−1).