Adsorption of Methylene Blue Using Chemically Enhanced Platanus orientalis Leaf Powder: Kinetics and Mechanisms
2020
Baba Imoro Musah, Lai Peng and Yifeng Xu
The adsorption of methylene blue in an aqueous medium using two activated carbons AC1 and AC1 + H3PO4 was studied. The AC1+ H3PO4 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 + H3PO4 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 + H3PO4 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.
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