Title: Photocatalytic decomposition of aqueous waste containing EDTA using nanosized gallium oxide/H2O2 system

Authors: H. Seshadri; P. Sasidhar; P.K. Sinha

Addresses: Safety Research Institute, Atomic Energy Regulatory Board, Kalpakkam 603 102, Tamil Nadu, India ' Safety Research Institute, Atomic Energy Regulatory Board, Kalpakkam 603 102, Tamil Nadu, India ' Centralised Waste Management Facility, BARC Facilities, Kalpakkam, 603 102, Tamil Nadu, India

Abstract: Oxidative degradation of Ethylenediaminetetracetic acid in aqueous solution using the polymorphs of gallium oxide, γ- and β-Ga2O3/H2O2 system was studied in this paper. Nanophases of γ- and β-Ga2O3 were synthesised through solution combustion method and characterised using Powder X-ray diffraction (XRD), Thermogravimetry (TG), Differential Thermal Analysis (DTA), and Raman spectra. The photocatalytic degradation efficiency these catalysts was compared with P-25 TiO2. 5 mg of Ga2O3 + 0.5 ml of H2O2 was employed as photocatalyst for the degradation of 1000 mg/l EDTA. Kinetics of EDTA degradation followed the order: β- Ga2O3+H2O2 > γ- Ga2O3+ H2O2 > P-25 TiO2+ H2O2.

Keywords: photocatalyst; gallium oxide; EDTA; ethylenediaminetetraacetic acid; hydrogen peroxide; decontamination factor; photocatalytic decomposition; aqueous waste; nanosized gallium oxide; oxidative degradation; kinetics; organic pollutants; effluent pretreatment.

DOI: 10.1504/IJEWM.2013.053123

International Journal of Environment and Waste Management, 2013 Vol.11 No.3, pp.244 - 254

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 05 Apr 2013 *

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