Linked Life Data

15743629

Source:http://linkedlifedata.com/resource/pubmed/id/15743629

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2005-3-3
pubmed:abstractText
The degradation of Acid Orange 7 (AO7) in aqueous solutions induced by gamma-ray irradiation was investigated in terms of both the disappearance of parent molecule (decoloration) and the degree of mineralization. The disappearance of AO7 followed pseudo first-order kinetics, whereas its mineralization could be described by zero-order kinetics. The pseudo first-order degradation rate constants were found to be proportional to irradiation dose rates and the reciprocals of initial AO7 concentrations. Based on the experimental results and a reaction analysis on the steady-state radiolysis of aerated aqueous solutions, a kinetic model was developed for describing the radiolytic degradation of AO7. Moreover, with this kinetic model, the reaction rate constants of e(aq)(-) and H. with AO7 were estimated as 3.0 x 10(9) and 8.4 x 10(9) x L mol(-1) s(-1), respectively. Taking the relative contributions of oxidative and reductive species to AO7 degradation into account, oxidative radiolysis proved to be a better approach for the degradation of AO7.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0043-1354
pubmed:author
pubmed:issnType
Print
pubmed:volume
39
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
839-46
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Kinetic modeling of the radiolytic degradation of Acid Orange 7 in aqueous solutions.
pubmed:affiliation
Department of Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't