Document Type : Research Article
Laboratoire de Constitution et Réaction de la Matière (LCRM) à l'UFR SSMT-Université Félix Houphouët-Boigny (UFHB) de Cocody -Côte d'Ivoire, 22 BP 582 Abidjan 22
Laboratoire de Chimie des Eaux (LCE) de l’Ecole Normale Supérieure d’Abidjan, 08 BP 10 Abidjan 08 Côte d’Ivoire.
Laboratoire des Procédés Industriels de synthèse de l’Environnement et des Energies nouvelles (LAPISEN) de l’Institut National Polytechnique Félix Houphouët Boigny de Yamoussoukro, BP 1093 Yamoussoukro, Côte d’Ivoire.
Institut National de la Recherche Scientifique. Département INRS-Eau Terre et Environnement, Université du Québec, 490 rue de la Couronne, Québec, QC G1K 9A9, Canad
This study falls not only into the theme of water depollution but also and above all into the recovery of waste (logic of the 3 R: Reduce, Reuse and Recycle). There was talk of recovering corncobs, which are considered as “agricultural waste” in developing countries such as Côte d’Ivoire. They were used as activated carbon to adsorb Black Remazol in a synthetic aqueous solution. This activated carbon obtained has a specific surface of 673.33 m²/g, a mass loss of 61.44 %, an iodine value of 168.31 mg.g-1 and a zero charge potential of 2.05. The design of experiments methodology was used on the one hand to detect the influential factors and on the other hand to optimize the elimination of this dye. Thus, in a first approach six factors (pH of the solution, mass of activated carbon, temperature, and concentration of the solution, stirring time and stirring speed) were used when using the Hadamard matrix. This showed that only three parameters, the mass of adsorbent, the concentration of the solution and the stirring time actually have an influence on the response. The results of the full two-level factorial design showed that the maximum removal rate of Black Remazol is 96.67 % under the conditions of stirring a solution with a concentration of 10 mg/L of this dye with a mass of adsorbent of 0.3 g for 20 minutes.