Synthesis of coal fly ash zeolite for the catalytic wet peroxide oxidation of Orange II

J. H. RAMIREZ; D. F. BLANCO GOMEZ; N. INCHAURRONDO; M. GUERRA-NÚÑEZ; C. P. RAMOS; P. HAURE; A. BARRERA BOGOYA; C. DI LUCA

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

SPRINGER HEIDELBERG

Lugar: HEIDELBERG; Año: 2019 vol. 26 p. 4277 - 4287

0944-1344

Fly ash, a coal combustion residue produced by Termotasajero in Colombia, has been hydrothermally treated to produce zeolite without addition of silicon or aluminium. The sample was characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Fluorescence Spectroscopy (XRF) Mössbauer spectroscopy and N2 Physisorption. The prepared material consisted of a mixture of zeolite X and zeolite A of high surface area and a Fe content of 6 %wt/wt. The zeolite was used as a catalyst for the Fenton oxidation of Orange II. Experiments were performed in a laboratory batch reactor at 70 oC and pH0 = 3, with the stoichiometric requirement of H2O2. Good mineralization (40%) and complete discoloration and oxidant consumption were obtained after 240 min of reaction. Sample retained activity after 16 h of usage.