Document Detail


H2O2/UV-C treatment of the commercially important aryl sulfonates H-, K-, J-acid and Para base: assessment of photodegradation kinetics and products.
MedLine Citation:
PMID:  19481776     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
H2O2/UV-C treatment of four commercially important aryl sulfonates (naphthalene sulfonic acids H-acid, K-acid, J-acid and benzene sulfonic acid Para base) in aqueous solutions was investigated. Photodegradation kinetics was followed in terms of changes brought about in the parent compound concentration via high performance liquid chromatography, as well as abatement of the collective environmental parameters COD and TOC. The efficiency of H2O2/UV-C treatment was also evaluated by determining H2O2 consumption rates throughout the reactions whereas the formation of intermediates (photodegradation products) was traced by means of mass spectrometry. Our experimental findings indicated that especially trisulfonated K-acid was not very prone to photochemical degradation, closely followed by the other studied aryl sulfonates. The highest abatement rates (treatment efficiencies and reaction kinetics) were obtained for the relatively simpler structured Para base. Mass spectrometric analysis revealed that the early stages of H2O2/UV-C treatment followed a (.)OH-addition mechanism as mainly hydroxylated photodegradation products were qualitatively identified.
Authors:
Idil Arslan-Alaton; Tugba Olmez-Hanci; Betul Hande Gursoy; Gokce Tureli
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-05-29
Journal Detail:
Title:  Chemosphere     Volume:  76     ISSN:  1879-1298     ISO Abbreviation:  Chemosphere     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-06-22     Completed Date:  2009-08-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  587-94     Citation Subset:  IM    
Affiliation:
Istanbul Technical University, Faculty of Civil Engineering, Department of Environmental Engineering, 34469 Maslak, Istanbul, Turkey. arslanid@itu.edu.tr
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MeSH Terms
Descriptor/Qualifier:
2-Naphthylamine / analogs & derivatives*,  chemistry
Benzenesulfonates / chemistry*
Environmental Pollutants / chemistry,  isolation & purification
Hydrogen Peroxide / chemistry*
Hydrogen-Ion Concentration
Kinetics
Naphthalenesulfonates / chemistry
Organic Chemicals / chemistry,  isolation & purification
Oxidation-Reduction
Photolysis*
Sulfonic Acids / chemistry*
Sulfuric Acid Esters / chemistry*
Ultraviolet Rays*
Chemical
Reg. No./Substance:
0/1-amino-8-nephthol-2, 2'-disulfonic acid; 0/2-naphthylamine 3,6,8-trisulfonic acid; 0/Benzenesulfonates; 0/Environmental Pollutants; 0/Naphthalenesulfonates; 0/Organic Chemicals; 0/Sulfonic Acids; 0/Sulfuric Acid Esters; 0/aniline-4-beta-ethyl sulfonyl sulfate-2-sulfonic acid; 7722-84-1/Hydrogen Peroxide; 87-02-5/7-amino-4-hydroxy-2-naphthalenesulfonic acid; 91-59-8/2-Naphthylamine

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


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