Document Detail


Kinetics and mechanism of photoactivated periodate reaction with 4-chlorophenol in acidic solution.
MedLine Citation:
PMID:  15669352     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The application of photoactivated periodate (UV/IO4-) to the degradation of 4-chlorophenol (4-CP) was explored in this study. Under low irradiation intensities (23 microW/cm2), wavelength of 266 nm, and pH 3, 4-CP was observed to degrade by pseudo-first-order reaction kinetics. The small reduction in 4-CP degradation in the presence of tert-butyl alcohol (t-BuOH) suggests that degradation of 4-CP by UV/IO4- was not dominated by an OH* pathway. O3 production was suppressed in the presence of t-BuOH under O2-limited environments and in the presence of 4-CP. Faster degradation of 4-CP in the presence of an OH* scavenger under nitrogen purging as compared to air-saturated conditions indicates that O(3P) is an important reactive species with 4-CP in this system. When 4-CP is added to the system, IO3- production is enhanced. On the basis of the elimination of potential reaction pathways, O(3P) and IO3* are suspected reactive species with 4-CP in this system.
Authors:
Liang-Hiong Chia; Xueming Tang; Linda K Weavers
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Environmental science & technology     Volume:  38     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2004 Dec 
Date Detail:
Created Date:  2005-01-26     Completed Date:  2005-04-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  6875-80     Citation Subset:  IM    
Affiliation:
Department of Chemical and Biomolecular Chemistry, The Ohio State University, Columbus, Ohio 43210, USA.
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MeSH Terms
Descriptor/Qualifier:
Chlorophenols / chemistry*
Hydrogen-Ion Concentration
Kinetics
Mitogens / chemistry*
Nitrogen / chemistry
Periodic Acid / chemistry*
Photochemistry
Water Pollutants
Chemical
Reg. No./Substance:
0/Chlorophenols; 0/Mitogens; 0/Water Pollutants; 10450-60-9/Periodic Acid; 106-48-9/4-chlorophenol; 7727-37-9/Nitrogen; 7790-28-5/metaperiodate

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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