Figure 4.

(a) Effect of contact time on the adsorption of MB without agitation (initial dye concentration: 7.81 × 10–2 mol/m3, volume of MB: 5 × 10–5 m3, adsorbent dose DA, PA: 0.00001 kg, pH = 8 for DA, pH = 6 for PA, T = 298 K). (b) Effect of agitation at 400 rpm on the adsorption of MB (initial dye concentration: 7.81 × 10–2 mol/m3, volume of MB: 5 × 10–5 m3, pH = 8 for DA, pH = 6 for PA, adsorbent amount DA, PA: 0.00001 kg, T = 298 K). (c) Effect of agitation on the removal percent of MB on DA and PA after 24 h.