Catalytic Wet Air Oxidation of Aromatics

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Environmental Catalysis".

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 1919

Special Issue Editor


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Guest Editor
Madia Department of Chemistry, Indiana University of Pennsylvania, IN, USA
Interests: natural zeolite; clay minerals; diatomite; carbon xerogels; mesoporous glasses; heterogeneous catalysis; adsorption; wastewater treatment

Special Issue Information

Dear Colleagues,

Aromatics are important water pollutants, which are discharged from various industries. Their effects are ranging from modifying the photosynthetic reactions in water bodies to altering cellular metabolism and DNA in humans. Physical, chemical, and biological methods were all investigated for the removal of such pollutants from wastewater. In many situations, due to the high toxicity and resistance to biological treatments, chemical destruction of the organic compounds, to carbon dioxide and water, is desired. Wet Air Oxidation (WAO) is one of the available technologies, suitable for high organic loads and/or toxic contaminants. The main disadvantage of this method is the need of elevated temperatures and pressure. Alternatively, WAO in the presence of a catalyst, Catalytic Wet Air Oxidation (CWAO), reduces the severity of the reaction conditions, therefore reducing the cost of wastewater treatment. As research in the CWAO field expands strongly, this issue proposes to gather the latest developments in terms of catalytic systems and process requirements.

“Catalytic Wet Air Oxidation of Aromatics” Special Issue will include original research articles, comprehensive reviews, and short communications, on the topic, as defined by the keywords below.

Dr. Sanda Andrada Maicaneanu
Guest Editor

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Keywords

  • Catalytic Wet Air Oxidation
  • Phenol
  • Phenolic
  • Dyes
  • Mesoporous materials
  • Catalyst preparation
  • Catalyst characterization
  • CWAO mechanism
  • Pilot and full-scale applications
  • Reactor design
  • Process control

Published Papers (1 paper)

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Research

14 pages, 3499 KiB  
Article
Characterization and Evaluation of Natural Bearing and Iron-Enriched Montmorillonitic Clay as Catalysts for Wet Oxidation of Dye-Containing Wastewaters
by Sanda Andrada Maicaneanu, David L. Henninger III, Charles H. Lake, Ethan Addicott, Loredana E. Olar and Razvan Stefan
Catalysts 2022, 12(6), 652; https://0-doi-org.brum.beds.ac.uk/10.3390/catal12060652 - 14 Jun 2022
Viewed by 1417
Abstract
Natural bearing (raw and calcined at 500 °C) and iron-enriched (impregnation and pillaring) montmorillonitic clay samples were prepared. The obtained samples were characterized (X-ray diffraction, Fourier Transformed Infrared Spectroscopy, Scanning Electron Microscopy, and Energy Dispersive X-ray Spectroscopy) and evaluated as catalysts in catalytic [...] Read more.
Natural bearing (raw and calcined at 500 °C) and iron-enriched (impregnation and pillaring) montmorillonitic clay samples were prepared. The obtained samples were characterized (X-ray diffraction, Fourier Transformed Infrared Spectroscopy, Scanning Electron Microscopy, and Energy Dispersive X-ray Spectroscopy) and evaluated as catalysts in catalytic wet oxidation of Brilliant Green and Crystal Violet. Experiments were conducted in the same conditions (0.5 g catalysts, 300 mL air/min or 0.5 mL H2O2, 25 mL of dye solution, 25 °C, initial solution pH = 6.0, for 3 h) in thermostated batch reaction tubes. Process evolution was followed using UV-Vis spectrometry (200–1100 cm−1) and total organic carbon. Dye removal efficiencies (decolorization) between 98 and 99% were determined, while total organic carbon removal efficiencies were calculated to be in the 53–98% range. Iron leakage investigation showed that iron is lost in higher amounts for the catalysts prepared using the impregnation method by comparison with the pillared sample. Full article
(This article belongs to the Special Issue Catalytic Wet Air Oxidation of Aromatics)
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