Photocatalytic degradation of Rhodamine B dye with TiO 2 immobilized on SiC foam using full factorial design
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ORIGINAL ARTICLE
Photocatalytic degradation of Rhodamine B dye with TiO2 immobilized on SiC foam using full factorial design Paul Henri Allé1 · Guy Didier Fanou1 · Didier Robert2 · Kopoin Adouby1 · Patrick Drogui3 Received: 21 January 2020 / Accepted: 21 July 2020 © The Author(s) 2020
Abstract Textile effluents treatment is one of the important environmental challenges nowadays. Photocatalysis has proven its effectiveness for the removal of recalcitrant compounds, and it is considered as a green technology for the treatment of effluents. However, good photocatalytic yield is strongly related to the operating parameters. In this study, a supported TiO2 on a β-SiC foam was tested for the removal of Rhodamine B (RhB). The photocatalytic discoloration of RhB synthetic solution in our condition was about 90%. The effects of each parameter were assessed through a full factorial design. Sixteen tests were carried out and the response was RhB removal. The most influent parameters were T iO2/β-SiC foam quantity, the concentration of RhB, the volume of H2O2 and pH. Their contributions on RhB removal were, respectively, 53.01, 30.49, 2.7, and 2.48% according to Pareto diagram. Analysis of the coefficients shows that initial concentration of RhB and volume of H2O2 had a negative effect on the response. However, the quantity of T iO2/β-SiC foam and pH had a positive effect on the response. The influence of the flow rate on the process was assessed. The results showed a slight increase in RhB removal. Furthermore, the aging test of T iO2/β-SiC foam on the photocatalytic efficiency was carried out after ten successive photocatalysis tests. Only 6.7% loss of yield was observed. These results are very encouraging for an application at the industrial scale. Keywords Photocatalysis · TiO2/β-SiC foam · Rhodamine B · Factorial design
Introduction * Kopoin Adouby [email protected] Paul Henri Allé [email protected] Guy Didier Fanou [email protected] Didier Robert didier.robert@univ‑lorraine.fr Patrick Drogui [email protected] 1
Laboratoire des Procédés Industriels de Synthèse, de l’Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique Félix Houphouët-Boigny, BP 1093, Yamoussoukro, Côte d’Ivoire
2
Institut de Chimie de Procédé pour L’Energie, L’Environnement et la Santé (ICPEES‑UMR 7515 CNRS), Université de Strasbourg, Strasbourg, France
3
Institut National de la Recherche Scientifique (INRS Eau Terre et Environnement), Université du Québec, 490 rue de la Couronne, Quebec City, Canada
The agricultural and industrial sectors as well as household release each day a huge amount of pollutants into surface water, making them nonusable (Telegang 2017). Among them, the most well known are pharmaceutical products, phenolic compounds, and dyes (Bouyarmane 2014). Synthetic dyes are widely used in numerous industries such as textile, printing, food, cosmetic, clinical, paper, leather, pharmaceutical, and food industries (Martínez-Huitle and Brillas 2009). In fact, world pro
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