| Formation of formic acid, acetic acid and lactic acid from decomposition of citric acid by coal ash particles at room temperature. | |
| | |
MedLine Citation:
|
PMID: 19272701 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
It was found for the first time that citric acid was decomposed to formic acid, acetic acid and lactic acid in the presence of coal ash particles at pH 3 at 20 degrees C, while it was not decomposed at more than pH 5. The yield of organic acid at stirring time of 60 min is in the order of formic acid>acetic acid>lactic acid. Since citric acid dissociates to citric anion at more than pH 5, it was suggested that citric anion and negatively charged coal ash particles repelled electrically each other at more than pH 5, resulting in that citric acid could not be adsorbed and not be decomposed on coal ash. Based on the obtained results, the decomposition of citric acid at pH 3 was suggested to be due to catalytic effects of coal ash. Since formic acid and acetic acid can be used as a material of hydrogen fermentation, coal ash could be used as a catalyst to synthesize the important material for hydrogen fermentation from wastewater of citric acid. |
| | |
Authors:
|
Hiroyuki Nakui; Kenji Okitsu; Yasuaki Maeda; Rokuro Nishimura |
Publication Detail:
|
Type: Journal Article Date: 2009-02-10 |
Journal Detail:
|
Title: Journal of hazardous materials Volume: 168 ISSN: 1873-3336 ISO Abbreviation: J. Hazard. Mater. Publication Date: 2009 Aug |
Date Detail:
|
Created Date: 2009-06-05 Completed Date: 2009-08-05 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9422688 Medline TA: J Hazard Mater Country: Netherlands |
Other Details:
|
Languages: eng Pagination: 548-50 Citation Subset: IM |
Affiliation:
|
Technology Development Center, Electric Power Development Co, Ltd, Chigasaki, Kanagawa, Japan. hiroyuki_nakui@jpower.co.jp |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Acetic Acid
/
chemistry Carbon Carboxylic Acids / chemistry* Citric Acid / chemistry* Coal* Formic Acids / chemistry Hydrogen-Ion Concentration Lactic Acid / chemistry Particulate Matter Temperature |
| Chemical | |
Reg. No./Substance:
|
0/Carboxylic Acids; 0/Coal; 0/Formic Acids; 0/Particulate Matter; 50-21-5/Lactic Acid; 64-18-6/formic acid; 64-19-7/Acetic Acid; 68131-74-8/fly ash; 7440-44-0/Carbon; 77-92-9/Citric Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Effects of particle size and acid addition on the remediation of chromite ore processing residue usi...
Next Document: Stripping of copper coatings from steel in Cr(VI)-free commercial bath.