Open AccessPhotocatalytic treatment based on TiO2 for a coal mining drainage
Author(s) -
Julie Joseane Murcia Mesa,
Ceidy Geraldine Patiño Castillo,
Hugo Alfonso Rojas Sarmiento,
J.A. Navı́o,
M.C. Hidalgo,
Alberto Angel Botero
Publication year - 2021
Publication title -
revista facultad de ingeniería universidad de antioquia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.16
H-Index - 12
eISSN - 2422-2844
pISSN - 0120-6230
DOI - 10.17533/udea.redin.20211063
Subject(s) - photocatalysis , x ray photoelectron spectroscopy , physisorption , diffuse reflection , diffuse reflectance infrared fourier transform , materials science , fourier transform infrared spectroscopy , nuclear chemistry , chemical engineering , chemistry , analytical chemistry (journal) , catalysis , environmental chemistry , organic chemistry , optics , physics , engineering
The aim of the present work was to evaluate the effectiveness of a heterogeneous photocatalyst based on TiO2 in the treatment of coal mining drainage which contains a variety of heavy metals and high concentration sulfates and sulfides. The photocatalytic behavior of the commercial reference Sigma Aldrich and the different materials synthesized using the Sol-gel methodology with surface modifications using sulfation and fluorination processes were analyzed. To find a possible correlation between the physicochemical properties of photocatalysts and their behavior, a characterization was carried out using X-Ray Diffraction (XRD), X-Ray Fluorescence spectrometry (XRF), Fourier transform infrared spectroscopy (FT–IR), UV–Vis diffuse reflectance Spectra (UV-Vis DRS), N2 physisorption, X-ray photoelectron spectroscopy (XPS), and particle size analysis. Results indicated that the modification of the TiO₂ prepared in the laboratory using sulfation and fluorination allowed the successful control of the physicochemical properties of this oxide. However, commercial TiO2 showed the greatest effectiveness in removing metals such as: Fe, Cu, Cr, and As after a photocatalytic reaction for a maximum of 1 hour under continuous nitrogen flow and a light intensity of 120 W/m2.