Treatment of Methylene Blue Dye Using Immersed Lamp Photocatalytic Reactor: 5 L Scale Study

Abstract

The present investigation studied methylene blue dye treatment using 5-L immersed lamp photocatalytic (UV) reactor. Dye treatment further studied using catalysts effects such as H2O2, ZnO, and TiO2. The marginal higher degradation was obtained for ZnO/UV compared to TiO2/UV effect, and it may be due to higher bandgap energy of ZnO. The maximum degradation was obtained for H2O2/UV (2 g/L) effect. The optimum findings of the present work were initial dye concentration: 31.3 µM, pH: 11, operating temperature: 28 °C, moles of dye removed: 30.1 ± 1.6 µM, moles of total organic carbon removed: 350.4 ± 17.5 µM, rate constant (pseudo-first order): 18.3 ± 0.7 × 10−3 min−1, and energy: 9.4 ± 0.4 × 10−3 µM. The present work showed the higher potential of scale-up photocatalytic reactor for treatment dye pollutants.