Photocatalytic decomposition of aqueous waste containing EDTA using nanosized gallium oxide/H₂O₂ system
by H. Seshadri; P. Sasidhar; P.K. Sinha
International Journal of Environment and Waste Management (IJEWM), Vol. 11, No. 3, 2013

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.

Online publication date: Sat, 20-Sep-2014

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