Abstract
Of the effect, the process parameters on photocatalytic degradation Eriochrome black T( EBT) dye has been degraded in a batch reactor under UV light in heterogeneous slurry utilizing various concentrations of two semiconductors commercial catalysts (Titanium dioxide and Zinc Oxide). The parameter has been studied (catalyst type, catalyst concentration, pH of dye solution and initial dye concentration). The results showed that the best dose of TiO2 and ZnO are 1.5 and 1 g/l respectively and the optimum pH (6 and 11) using TiO2 and ZnO respectively. Moreover, the comparative assessment of the photocatalytic efficiency was made for different photocatalytic powder. It was noticed that the best photocatalytic efficiency as ZnO > TiO2 . The investigational results were also assessed in expressions of chemical oxygen demand (COD) and color reductions to study treatment efficiency. Maximum COD removed was observed to be around 95%. The decolorization and the oxidation efficiencies could achieve 95% and 88% for ZnO and TiO2 respectively at the optimum conditions for both catalysts (30 ppm Eriochrome black T dye solution).
Highlights
Water pollution is a severe problem facing the chemical production in the world
Experiments have been done with two types of catalyst (ZnO and TiO2) the concentration for each photocatalyst is vary to choice the best concentration of each catalyst for the treatment of eriochrome black T dye
The outcome refers that zinc oxide (ZnO) give the best photocatalytic efficiency than the TiO2
Summary
Water pollution is a severe problem facing the chemical production in the world. For toxic and polluted water different methods have been reported, such as photo catalytic degradation process with several of semiconductors is an effective method. Papers concerning the photo-removal of EBT dye were as yet missing and insufficient, form quick and effective AOP (Advance Oxidation Process) Technically. All of the studies above studies display promising results of EBT photo-decolorization execution, the interaction between the processing parameters (catalysts loading, the concentration of dyes, pH, etc.) were not taking into arithmetic and the mechanism contributory was still lacking in /unclear. This work aims to remove the Eriochrome black-T dye (EBT) under UV light with two commercial semiconductors catalysts such as ZnO and TiO2 by varying process parameters for example (semiconductor photocatalyst, concentration, pH, and feed concentration) to choice the optimum condition for all catalysts
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