Photocatalytic degradation of Rhodamine B dye with TiO2 immobilized on SiC foam using full factorial design

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 rela...

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Veröffentlicht in:Applied water science 2020-09, Vol.10 (9), p.1-9, Article 207
Hauptverfasser: Allé, Paul Henri, Fanou, Guy Didier, Robert, Didier, Adouby, Kopoin, Drogui, Patrick
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Sprache:eng
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Zusammenfassung: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 TiO 2 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 TiO 2 /β-SiC foam quantity, the concentration of RhB, the volume of H 2 O 2 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 H 2 O 2 had a negative effect on the response. However, the quantity of TiO 2 /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 TiO 2 /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.
ISSN:2190-5487
2190-5495
DOI:10.1007/s13201-020-01282-4