Removal of As(III) and As(V) using rubber tire derived activated carbon modified with alumina composite

Waste tire rubber derived activated carbon-alumina composites (ACALs) and tire rubber alumina composite (TRAL) were used as efficient adsorbent for the rapid removal of As(III) and As(V). The developed adsorbents i.e. activated carbon-alumina composites were synthesized through a two-step pyrolytic technique at 700 degrees C in the presence of N-2 gas along with steam. Ratio metric preparation of the activated carbon-alumina composites was carried out using activated carbon and aluminum hydroxide in 1:1 ratio by weight i.e. activated carbon alumina composites (ACAL) 11, and 1:2 ratio by weight i.e. activated carbon-alumina composites (ACAL) 12 and 2:1 ratio by weight i.e. activated carbon-alumina composites (ACAL) 21. It was observed that an activated carbon-alumina composite (ACAL) 11 has greater BET surface area and arsenic adsorptive capacity as compared to other developed adsorbent. The adsorbents activated carbon-alumina composites (ACAL) 11 and tire rubber alumina composite (TRAL) were subjected to adsorption of As(III) and As(V) ions from aqueous solution and the impact of influential parameters such as pH, adsorbent dose, contact time and initial adsorbate concentration was well investigated and optimized. The developed adsorbents showed higher adsorption capacity for As(V) in comparison with that of As(III). (C) 2016 Elsevier B.V. All rights reserved.