| Reduction of acrolein by elemental iron: kinetics, pH effect, and detoxification. | |
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MedLine Citation:
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PMID: 16683621 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Acrolein is a highly toxic alpha,beta-unsaturated aldehyde that is widely used as a biocide, a cross-linking agent, and an intermediate in the chemical industry, among other applications. In this study we investigated the reductive transformation of acrolein by elemental iron and evaluated the feasibility of using iron to detoxify acrolein. At acidic and neutral pH, acrolein was transformed by iron through reduction of the C=C double bond to propionaldehyde. The reduction appeared to involve the chemisorption of acrolein to the iron surface followed by reduction of adsorbed acrolein. Both the adsorption and reduction rate constants decreased with increasing pH. Between pH 7.0 and 7.4, the acrolein adsorption rate constant decreased precipitously, resulting in a sharp decline in its removal rate. At higher pH, acrolein disappeared rapidly in control without iron, presumably due to reversible, base-catalyzed hydration. At equilibrium, approximately 93% of acrolein was hydrated, corresponding to an equilibrium constant of 13. Acrolein at 25 mg/L completely inhibited aerobic respiration; in contrast, its reduction product propionaldehyde was biodegradable. This suggests that elemental iron may be used to pretreat acrolein-containing wastes prior to aerobic biodegradation. To our knowledge, this is the first report of reduction and detoxification of an alpha,beta-unsaturated aldehyde by elemental iron. |
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Authors:
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Seok-Young Oh; Jaewoo Lee; Daniel K Cha; Pei C Chiu |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Environmental science & technology Volume: 40 ISSN: 0013-936X ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2006 Apr |
Date Detail:
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Created Date: 2006-05-10 Completed Date: 2006-09-15 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
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Languages: eng Pagination: 2765-70 Citation Subset: IM |
Affiliation:
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Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware 19716, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acrolein
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chemistry,
isolation & purification*,
toxicity Adsorption Aldehydes / chemistry, metabolism Bacteria, Aerobic / metabolism Biodegradation, Environmental Hydrogen-Ion Concentration Iron / chemistry* Kinetics Oxidation-Reduction Oxygen / metabolism Waste Disposal, Fluid* Water Pollutants, Chemical / isolation & purification, toxicity Water Purification / methods |
| Chemical | |
Reg. No./Substance:
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0/Aldehydes; 0/Water Pollutants, Chemical; 107-02-8/Acrolein; 123-38-6/propionaldehyde; 7439-89-6/Iron; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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