Degradation of Organic Pollutants by Wet Air Oxidation Using Nonnoble Metal-Based Catalysts
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 17, Issue 2
Abstract
Phenol is a major organic pollutant found in wastewater streams generating from several industries. The presence of excess phenol makes the wastewater unsuitable for conventional biological treatment. The present study was performed to treat synthetic phenolic wastewater by catalytic wet air oxidation (CWAO) at low operating conditions (90–150°C temperature and 0.5 MPa total air pressures). In addition, the degradation of two major intermediates (acetic acid and oxalic acid) was also observed under similar operating conditions. The reaction was performed in a stainless steel (SS-316) high-pressure reactor. Among all homogeneous ( and ) and heterogeneous catalysts ( in different proportions: , , , and ), exhibited the best performance with more than 90% reductions in phenol and total organic carbon (TOC) at 120°C temperature within 4 h. showed good capability for the removal of oxalic and acetic acids (TOC reductions were 81% and 67%, respectively). Future studies can be aimed to investigate the catalytic activity of for industrial effluents containing phenol as a major pollutant.
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Acknowledgments
The authors are thankful to IRCC, IIT Bombay for providing financial support to carry out the reported work.
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Information & Authors
Information
Published In
Journal of Hazardous, Toxic, and Radioactive Waste
Volume 17 • Issue 2 • April 2013
Pages: 89 - 96
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Nov 3, 2011
Accepted: Jul 18, 2012
Published online: Mar 15, 2013
Published in print: Apr 1, 2013
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