Effects of Operational Parameters on Decolorization of C. I. Acid Red 88 by UV/H₂O₂ Process: Evaluation of Electrical Energy Consumption

Abstract

In the present study, effects of operational parameters on the electrical energy consumption for photooxidative process (UV/H 2 O 2 ) for the decolorization of C. I. Acid Red 88 (AR88) have been investigated. In a series of experiments, 20 mg L À1 of AR88 solution were irradiated in the presence of different concentrations of H 2 O 2 (to find out optimum amount of H 2 O 2 ) by UV light intensity of 30 W m À2 for certain irradiation times. The decolorization of the dye followed pseudo first-order kinetics, and hence, the figure-of-merit electrical energy per order (E EO ) is appropriate for estimating the electrical energy efficiency. The electrical energy consumption was determined during the variation of some parameters such as initial H 2 O 2 concentration, initial dye concentration, UV light intensity, pH, and the gap size of solution. Results showed that electrical energy could be reduced by optimizing operational parameters.

UV/H2O2 Process Under High Intensity UV Irradiation: A Rapid and Effective Method for Methylene Blue Decolorization

“…This process is economical compared with other advanced oxidation processes (e.g., E EO = 3.97–15.9 kWh m −3 order −1 for UV/O 3 treatment 24; E EO = 32–37 kWh m −3 order −1 for photocatalytic process 25; E EO = 633.79 kWh m −3 order −1 for ultrasound treatment 26; E EO = 1033 kWh m −3 order −1 for ultrasound/UV/Fe(II) treatment 27). However, the E EO value in our study is on the high side among other reports of UV/H 2 O 2 process (e.g., E EO = 2.44 kWh m −3 order −1 for [Direct Red 23] 0 = 30 mg L −1 28; E EO = 2.51 kWh m −3 order −1 for [Acid Orange 7] 0 = 19.55 mg L −1 29; E EO = 14.1 for [Acid Red 88] 0 = 20 mg L −1 30; E EO = 45 kWh m −3 order −1 for [Acid Blue 9] 0 = 30 mg L −1 31). The E EO value of black light lamp was also calculated under the same condition as high photon flux UV/H 2 O 2 process, and the E EO value of black light lamp was 5.51 kWh m −3 order −1 .…”

Photocatalytic degradation of ciprofloxacin by synthesized TiO2 nanoparticles on montmorillonite: Effect of operation parameters and artificial neural network modeling

“…Therefore, hydrogen peroxide can be considered as an effective chemical for the generation of hydroxyl radicals to enhance the degradation efficiency [49,70].The addition of potassium iodate can also enhance the photocatalytic degradation efficiency of CIP. The reason is due to the formation of highly reactive radicals and also the capture of the generated electron by this oxidant.…”

Synthesis of novel acyclic and multiple phenyl iron tetraamino ligand catalysts and its catalytic activity for degradation of dye wastewater by H2O2

“…Compared with the inorganic ferrous salt used in the Fenton process, Fe III ‐TAML catalyst has the advantages of wide pH range, low dosage, no secondary pollution, and environmental friendliness. [ 28 ] Therefore, it has been widely studied and applied in various fields. At present, Fe III ‐TAML has been used to degrade a variety of pollutants in wastewater, including dyes, estrogen compounds, nitrophenol, bromophenol, thiophosphate insecticides, and pharmaceuticals.…”