Effect of Oxide Presence in Activated Carbon on Arsenic Removal

This study investigated the effect of oxides on removal As when present in simple mixtures with granular activated carbon (GAC) particles. The performance these was compared other reported GAC-based adsorbents. A standard curve for ultraviolet adsorption vs. concentration obtained using silver diethyldithiocarbamate (SDDC) method to evaluate various samples. preliminary carried out find optimal conditions experiments. For 50 mL samples 2.35 ppm As, values pH, time, and amount adsorbent were pH 7, 30 min, mg, respectively. ratio between well water this showed a superior capacity (1 g/L, 2.1 mg/g) similar adsorbents previously (12.5 1.0-1.4 mg/g). Among adsorbents, KOH-treated AC-Mn3O4 exhibited best an efficiency ~95%. oxide particles had synergistic GAC removal. primarily due change potential partially agglomerated nano Mn3O4 ACK surface. influence surface area not pronounced. All results explained terms microstructure, specific area, zeta potential. finding could be extended carbons (AC) from different sources.