Catalytic oxidation of cresols using molecular ozone
type: CreativeWork
description: Catalytic oxidation of cresols using molecular ozone. The environment, both in general and specifically our habitable segment is currently under threat from surfacing chemical pollutants that are generated mostly from pharmaceutical and industrial sectors. The extended use of cresols (meta-, ortho-, and para-cresol) in these sectors makes them potential pollutants and yet they are of hazardous nature to human, plants and animals. Therefore, the necessity to efficiently degrade these compounds is heightened and one of the reliable tools would be chemical oxidation, mainly advanced oxidation processes, which in this work refers to heterogeneously catalyzed oxidation of cresols using molecular ozone. The main objective of this study was to catalytically oxidize various cresol isomers using ozone. All oxidation reactions were studied as a function of time. Metal (Ni, Fe, Mn, V) loaded γ-Al2O3, SiO2 and V2O5 catalysts were synthesized by wet impregnation method. These catalysts were further calcined (300 oC) in air and characterized using powder X-ray diffraction (XRD), Fourier Transform-Infrared (FT-IR), inductively coupled plasma-optical emission spectroscopy (ICP-OES), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, transmission electron microscopy (TEM) and Brunauer-Emmet-Teller (BET) surface area analyzer. These analytical techniques provided essential information about the catalysts, ranging from solid phase composition and purity, catalyst surface morphology, concentration of a loaded metal on a support to the specific surface area of the catalyst material. Prior to the application of these calcined catalysts in the oxidation of meta-, ortho- and para-cresol, a brief study of column mounted oxidation of cresols was done. A volume of 3.0 mL for each cresol isomer was adsorbed on pure γ-Al2O3 and SiO2, mounted on a vertical glass column and oxidized with O3 (0.123 mg/L) for 1, 3 and 5 h intervals. After each oxidation reaction, the sa…
abstract: Catalytic oxidation of cresols using molecular ozone. The environment, both in general and specifically our habitable segment is currently under threat from surfacing chemical pollutants that are generated mostly from pharmaceutical and industrial sectors. The extended use of cresols (meta-, ortho-, and para-cresol) in these sectors makes them potential pollutants and yet they are of hazardous nature to human, plants and animals. Therefore, the necessity to efficiently degrade these compounds is heightened and one of the reliable tools would be chemical oxidation, mainly advanced oxidation processes, which in this work refers to heterogeneously catalyzed oxidation of cresols using molecular ozone. The main objective of this study was to catalytically oxidize various cresol isomers using ozone. All oxidation reactions were studied as a function of time. Metal (Ni, Fe, Mn, V) loaded γ-Al2O3, SiO2 and V2O5 catalysts were synthesized by wet impregnation method. These catalysts were further calcined (300 oC) in air and characterized using powder X-ray diffraction (XRD), Fourier Transform-Infrared (FT-IR), inductively coupled plasma-optical emission spectroscopy (ICP-OES), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, transmission electron microscopy (TEM) and Brunauer-Emmet-Teller (BET) surface area analyzer. These analytical techniques provided essential information about the catalysts, ranging from solid phase composition and purity, catalyst surface morphology, concentration of a loaded metal on a support to the specific surface area of the catalyst material. Prior to the application of these calcined catalysts in the oxidation of meta-, ortho- and para-cresol, a brief study of column mounted oxidation of cresols was done. A volume of 3.0 mL for each cresol isomer was adsorbed on pure γ-Al2O3 and SiO2, mounted on a vertical glass column and oxidized with O3 (0.123 mg/L) for 1, 3 and 5 h intervals. After each oxidation reaction, the sa…
author: Ncanana, Zamani Siphephelo
keywords: Chemical pollutants --cresols --chemical oxidation
license: https://devspace.unizulu.ac.za/bitstreams/075e4986-6904-43ee-9fc4-c6ec8c8fc990/download
date published: 2017
date modified: 2026-07-24T06:17:08Z
provider: University of Zululand
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Zululand