The activated carbon (AC) was used for removal of As(III) and As(V) ions from aqueous solutions. Sorption experiments were conducted using both batch and column systems. The effect of some important parameters on sorption of these by AC was studied. It was found that among the different factors affecting sorption capacity and efficiency in removal of arsenic from aqueous solutions, the effect of pH and the oxidation state were the most prominent. The optimum pH values for removal of As(III) and As(V) from aqueous solutions using AC was found 12 and 3 respectively. Impregnation of AC with sulphur contain organic dyes, it is possible to improve As(III) uptake considerably.
Ansari, R., & Sadegh, M. (2007). Application of activated carbon for removal of arsenic ions from aqueous solutions. E-Journal of Chemistry, 4(1), 103–108. https://doi.org/10.1155/2007/829187