Optimization by Using Response Surface Methodology of the Preparation from Plantain Spike of a Micro-/Mesoporous Activat
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RESEARCH ARTICLE-CHEMICAL ENGINEERING
Optimization by Using Response Surface Methodology of the Preparation from Plantain Spike of a Micro-/Mesoporous Activated Carbon Designed for Removal of Dyes in Aqueous Solution Bi Gouessé Henri Briton1 · Benjamin Kouassi Yao1 · Yohan Richardson2 · Laurent Duclaux3 · Laurence Reinert3 · Yasushi Soneda4 Received: 2 August 2019 / Accepted: 28 January 2020 © King Fahd University of Petroleum & Minerals 2020
Abstract Response surface methodology based on central composite design was used as a tool to optimize the preparation of micro/mesoporous activated carbon from plantain spike. The impact of three variables: activation temperature, activation time, and H3 PO4 impregnation ratio, were evaluated on the iodine number and the methylene blue (MB) index according to the model-determined conditions. These three variables have been extensively studied using analysis of variance to assess their significance. Each response was described by a second-order regression equation showing good agreement between the predicted and the experimental data as the adjusted correlation coefficients were greater than 0.80. The multi-response optimized conditions have been set at the temperature of 480 °C, the activation time of 113 min, and the impregnation ratio of 3.34/1 (w/w). The activated carbon prepared in these conditions has a specific surface area of 896 m2 /g with micro- and mesopore volumes of 34% and 66%, respectively. Water depollution capacity of this activated carbon evaluated by adsorption of MB and iodine was 206 mg/g and 927 mg/g, respectively. Keywords Plantain spike · Optimization · Activated carbon · Porosity · Iodine number · Methylene blue index
1 Introduction In recent years, the rapid rise of the textile sector industrialization has greatly increased the consumption of synthetic dyes estimated at 7 × 105 tons per year [1] worldwide, of which about 10–15% are found in effluents after dyeing pro-
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Bi Gouessé Henri Briton [email protected]
1
Laboratoire de Procédés Industriels de Synthèse, de L’Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Félix Houphouët Boigny (Côte d’Ivoire), BP 1093, Yamoussoukro, Côte d’Ivoire
2
Laboratoire Energies Renouvelables et Efficacité Energétique (LabEREE), Institut International d’ingénierie de l’eau et de L’Environnement (Burkina Faso), 01 Bp 594, Ouagadougou 01, Burkina Faso
3
Laboratoire de Chimie Moléculaire et de L’Environnement (LCME), Université Savoie Mont Blanc, 73000 Chambéry, France
4
National Institute of Advanced Industrial Science and Technology, Energy Technology Research Institute, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
cess [2, 3]. Many of textile industries in developing countries, including the craft sector, are often unable to treat highly colored process water which is released directly in watercourses because of inefficient technology or high processing costs. In addition, the hospital effluents containing some micropollutants such as dermal Betadine or other antisept
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