摘要：The adsorption of methylene blue in an aqueous medium using two activated carbons AC1 and AC1 + H 3 PO 4 was studied. The AC1+ H 3 PO 4 adsorbent, which was inoculated with phosphoric acid, had better methylene blue removal capacity compared with AC1 adsorbent which had only thermal treatment. The optimum activation temperature for both adsorbents was 500°C while the suitable activation time was 180 min. The best pH in this investigation was 6. With AC1 + H 3 PO 4 adsorbent, 100% removal of methylene blue was recorded for concentrations 20 to 100 mg.L -1 and the suitable adsorbent dosage was 3 g.L -1 . The effect of temperature showed insignificant effect on the adsorption of methylene blue ions. The SEM results for AC1 + H 3 PO 4 adsorbent showed better pores compared with AC1, an indication that, the injection of phosphoric acid into it before the activation played a significant role in enhancing the porosity of the adsorbent surface.
