Degradation of formaldehyde by advanced oxidation processes

The degradation of formaldehyde in an aqueous solution (400 mg L−1) was studied using photolysis, peroxidation and advanced oxidation processes (UV/H2O2, Fenton and photo-Fenton). Photolysis was the only process tested that did not reduce formaldehyde concentration; however, only advanced oxidation...

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Bibliographic Details
Published in:	Journal of environmental management Vol. 107; pp. 96 - 101
Main Authors:	Guimarães, José Roberto, Turato Farah, Carolina Rittes, Maniero, Milena Guedes, Fadini, Pedro Sérgio
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ltd 30-09-2012 Elsevier Academic Press Ltd
Subjects:	Aldehydes Anatomy Anatomy lab effluent Animal, plant and microbial ecology AOPs Applied ecology Aqueous solutions biochemical oxygen demand Biodegradation Biological and medical sciences Carbon Carbon - chemistry chemical oxygen demand Chemicals Conservation, protection and management of environment and wildlife Degradation dissolved organic carbon Effluents Environmental degradation Environmental management Environmental science Formaldehyde Formaldehyde - chemistry Fundamental and applied biological sciences. Psychology General aspects Oxidation Oxidation-Reduction peroxidation Photolysis Ultraviolet radiation Anatomy lab effluent Formaldehyde AOPs Degradation Oxidation Anatomy Environmental management Effluent
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Summary:	The degradation of formaldehyde in an aqueous solution (400 mg L−1) was studied using photolysis, peroxidation and advanced oxidation processes (UV/H2O2, Fenton and photo-Fenton). Photolysis was the only process tested that did not reduce formaldehyde concentration; however, only advanced oxidation processes (AOPs) significantly decreased dissolved organic carbon (DOC). UV/H2O2 and photo-Fenton AOPs were used to degrade formaldehyde at the highest concentrations (1200–12,000 mg L−1); the processes were able to reduce CH2O by 98% and DOC by 65%. Peroxidation with ultraviolet light (UV/H2O2) improved the efficiency of treatment of effluent from an anatomy laboratory. The effluent's CH2O content was reduced by 91%, DOC by 48%, COD by 46% and BOD by 53% in 420 min of testing. ► CH2O degradation by UV, H2O2, UV/H2O2, Fenton and photo-Fenton was evaluated. ► There was no photodecomposition of CH2O. ► Although the peroxidation was able to degrade CH2O, it was not able to reduce DOC. ► DOC removal efficiency was found to be: UV/H2O2 > photo-Fenton > Fenton. ► UV/H2O2 and photo-Fenton are indicated for treatment of anatomy lab effluents.
Bibliography:	http://dx.doi.org/10.1016/j.jenvman.2012.04.024 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	0301-4797 1095-8630
DOI:	10.1016/j.jenvman.2012.04.024