An Efficient Visible Light Driven Photocatalytic Removal of Dyes from the Dye Effluent using Metal Halide Lamp Based Slurry Reactor

Dnyaneshwar R. Shinde,1

Imran S. Quraishi2

Ramdas A. Pawar1,2*Email

1P.D.E. A's, Prof .Ramkrishna More College, Akurdi, Pune-411044, affiliated to Savitribai Phule Pune University (India)

2 P.D.E.A's, Baburaoji Gholap College, Sangvi, Pune, 411027, affiliated to Savitribai Phule Pune University (India)

Abstract

The present work focuses on the best source of radiation and optimization of the process parameters in the photocatalytic degradation of the dye in a slurry reactor. For the photocatalytic degradation of dyes in water, a cylindrical slurry photoreactor has been fabricated in glass of two litter capacity. The performance of a reactor in the degradation of Orange M2R dye was evaluated under visible light irradiation using ZnO as a photo-catalyst. ZnO was obtained by thermal decomposition of ZnCO3 and characterized for its crystalline structure, surface morphology, and the band gap. Different parameters affecting the degradation of the dye in the reactor were optimized. The pH of the dye solution, catalyst dose, and concentration of the dye solution were found to be dominating experimental parameters affecting the dye degradation in the reactor. Taguchi L9(34) orthogonal array method was used to design the degradation experiment. The pseudo-first-order decolourization rate constant was evaluated by applying the Langmuir–Hinshelwood equation. The results of the experiments were statically analysed and compared to obtain the optimal experimental conditions for the degradation of the dye in the reactor. The research finding proved that metal halide lamp is the best source for the process.