[ Utilisation du plan factoriel complet pour l’optimisation des conditions opératoires d’élimination du plomb par les charbons actifs issus des coques de noix de coco ]
Volume 27, Issue 1, August 2019, Pages 54–64
Kouassi Narcisse Aboua1, Kossonou Roland N’GUETTIA2, Moussa DIARRA3, Kouadio Dibi4, and Karim Sory TRAORE5
1 Nangui Abrogoua University, Department of Sciences and Environmental Management, Laboratory of Environmental Sciences, 02 BP 801 Abidjan 02, Cote d’Ivoire
2 Laboratoire National d’Appui au Développement Agricole (LANADA), 04 BP 612 Abidjan 04, Côte d’Ivoire
3 UFR Environnement, Université Jean Lorougnon Guédé, BP 150 Daloa, Côte d’Ivoire
4 Nangui Abrogoua University, Department of Sciences and Environmental Management, Laboratory of Environmental Sciences, 02 BP 801 Abidjan 02, Cote d’Ivoire
5 UFR Sciences et gestion de l’Environnement, Université Nangui Abrogoua, 02 B.P 801 Abidjan 02, Côte d’Ivoire
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Adsorption of heavy metals on activated carbons is influenced by various factors that must be controlled. This study investigates the optimal conditions for removal lead on activated carbon using experimental designs. Thus influence of three parameters (pH, lead concentration and activated carbon) on adsorption rate was studied. Activated carbons was prepared from coconuts shells of Côte d’Ivoire by using chemical activation method. PH, lead concentration and coal nature are the factors taken into account in the two-level complete factorial plan used for optimization. Values of lead elimination rate are between 87 % and 96 % thus indicating the pertinence of the choice of the experimental domain. Moreover, two of the three factors; pH and lead concentration have a significant influence on the lead removal rate. Also, interactions between carbon type and lead concentration and those between pH and concentration have a significant influence on adsorption. Thus, the optimal adsorption conditions of 50 mL of lead at 150 mg / L of concentration are obtained with 0.3 g of activated carbon, at pH 6 and at a temperature of 25 ° C. Experimental designs therefore make it possible to optimize lead removal conditions from wastewater.
Author Keywords: Activated Carbon, Adsorption, Lead, Optimization, Expeimental Design, wastewater.
Volume 27, Issue 1, August 2019, Pages 54–64
Kouassi Narcisse Aboua1, Kossonou Roland N’GUETTIA2, Moussa DIARRA3, Kouadio Dibi4, and Karim Sory TRAORE5
1 Nangui Abrogoua University, Department of Sciences and Environmental Management, Laboratory of Environmental Sciences, 02 BP 801 Abidjan 02, Cote d’Ivoire
2 Laboratoire National d’Appui au Développement Agricole (LANADA), 04 BP 612 Abidjan 04, Côte d’Ivoire
3 UFR Environnement, Université Jean Lorougnon Guédé, BP 150 Daloa, Côte d’Ivoire
4 Nangui Abrogoua University, Department of Sciences and Environmental Management, Laboratory of Environmental Sciences, 02 BP 801 Abidjan 02, Cote d’Ivoire
5 UFR Sciences et gestion de l’Environnement, Université Nangui Abrogoua, 02 B.P 801 Abidjan 02, Côte d’Ivoire
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Adsorption of heavy metals on activated carbons is influenced by various factors that must be controlled. This study investigates the optimal conditions for removal lead on activated carbon using experimental designs. Thus influence of three parameters (pH, lead concentration and activated carbon) on adsorption rate was studied. Activated carbons was prepared from coconuts shells of Côte d’Ivoire by using chemical activation method. PH, lead concentration and coal nature are the factors taken into account in the two-level complete factorial plan used for optimization. Values of lead elimination rate are between 87 % and 96 % thus indicating the pertinence of the choice of the experimental domain. Moreover, two of the three factors; pH and lead concentration have a significant influence on the lead removal rate. Also, interactions between carbon type and lead concentration and those between pH and concentration have a significant influence on adsorption. Thus, the optimal adsorption conditions of 50 mL of lead at 150 mg / L of concentration are obtained with 0.3 g of activated carbon, at pH 6 and at a temperature of 25 ° C. Experimental designs therefore make it possible to optimize lead removal conditions from wastewater.
Author Keywords: Activated Carbon, Adsorption, Lead, Optimization, Expeimental Design, wastewater.
Abstract: (french)
L’adsorption des métaux lourds sur charbon actif est contrôlée par divers facteurs dont la maitrise permet de garantir une grande efficacité. L’objectif de ce travail est donc d’optimiser les conditions d’adsorption du plomb sur des charbons actifs par l’usage des plans d’expériences. Les charbons utilisés sont préparés à partir de coques de noix de coco de Côte d’Ivoire. Le pH, la concentration de plomb et la nature du charbon sont les facteurs pris en compte dans le plan factoriel complet à deux niveaux utilisé pour l’optimisation. Le taux d’adsorption constitue la réponse pour les différents tests de la matrice d’expériences et les résultats sont compris entre 87 % et 96 %. Ces valeurs indiquent la pertinence du choix du domaine d'étude. Par ailleurs, deux des trois facteurs, le pH et la concentration de plomb, ont une influence significative sur le taux d’élimination du plomb. De plus, les interactions entre le type de charbon et la concentration et celle entre le pH et la concentration influencent significativement l’adsorption. Ainsi, les conditions optimales d’adsorption de 50 mL de plomb de concentration 150 mg/L sont obtenues avec 0,3 g de charbon, à pH 6 et à la température de 25 °C. Les plans d’expériences permettent donc d’optimiser les conditions d’élimination du plomb en milieu aqueux.
Author Keywords: Charbon actif, Adsorption, Plomb, Optimisation, Plan d’expériences, Eaux usées.
How to Cite this Article
Kouassi Narcisse Aboua, Kossonou Roland N’GUETTIA, Moussa DIARRA, Kouadio Dibi, and Karim Sory TRAORE, “Optimization of conditions of lead adsorption on activated carbons from coconut shells using full factorial design,” International Journal of Innovation and Applied Studies, vol. 27, no. 1, pp. 54–64, August 2019.
