Characterization of Activated Carbon Synthesized from Coffee Hulls
A.F. KokoraA.F. Kokora, K.N. Aboua, K.R. N’guettia, B.D. Soro, L.D. Kouadio, M. Ladji and K. S. Traore
Adsorption on commercial activated carbon (CAC) is a highly sought-after physical technique for the treatment of industrial effluents . However, this adsorbent is expensive for developing countries where it is imported . As a result, research is shifting towards local natural materials as alternatives to CAC because of their comparable efficiency, high availability and low cost . This study aims to produce activated carbons with interesting structural and chemical characteristics from biomass. Thus, four coals of coffee shells three of which were activated by orthophosphoric acid (H3PO4) at different concentrations and a crude were developed. Characterization of these coals was done by different methods (Boehm, MEB-EDS, Methylene Blue adsorption and First bisector). The results showed that 60% activated charcoal of H3PO4 has an acidic character, a production yield of 43.72%, a carbon content of 69.67%, a developed porous structure and a surface area of 705 m2. g-1. The results indicate the high quality of the obtained active carbon. In perspective, the characterization by the use of the BET method (Brunauer-Emmett and Teller) for the determination of the specific surface and the porosity (pore volume) will be investigated and the capacity of this CA to treat the textiles effluents evaluated.