Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
PAH degradation by UV/H2O2 in perfluorinated surfactant solutions
Autore:
An, YJ; Carraway, ER;
Indirizzi:
Texas A&M Univ, Dept Civil Engn, Environm Engn Div, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 gn Div, College Stn, TX 77843 USA
Titolo Testata:
WATER RESEARCH
fascicolo: 1, volume: 36, anno: 2002,
pagine: 309 - 314
SICI:
0043-1354(200201)36:1<309:PDBUIP>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
HYDROGEN-PEROXIDE; OXIDATION; PHOTOLYSIS; RADIATION; MICELLES; WATER;
Keywords:
perfluorinated surfactant (PFS); ammonium perfluorooctanoate (APFO); polycyclic aromatic hydrocarbons (PAHs); photolysis; hydrogen peroxide; surfactant recovery;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: An, YJ US EPA, Res Associateship Program, Natl Risk Management Res Lab, Ada, OK 74820 USA US EPA Ada OK USA 74820 Risk Management Res Lab, Ada, OK 74820 USA
Citazione:
Y.J. An e E.R. Carraway, "PAH degradation by UV/H2O2 in perfluorinated surfactant solutions", WATER RES, 36(1), 2002, pp. 309-314

Abstract

Polycyclic aromatic hydrocarbons (PAHs) solubilized in perfluorinated surfactant (PFS) solutions were degraded by direct photolysis and UV/H2O2 process. The subsequent recovery and reuse of these surfactant solutions were also demonstrated. Phenanthrene and pyrene were selected as representative PAHs and an anionic PFS; ammonium perfluorooctanoate (APFO) was used, In our experiments, micellar APFO solutions retarded the phenanthrene photolysis and enhanced the pyrene photolysis. The results indicate that the photochemical reactivity of compound in micelles is strongly dependent on specific properties of the solubilizate, possibly due to the different excited state behaviors of compound. UV/H2O2 process exhibits a greatly enhanced rate of PAH photolysis in both water and APFO compared to direct photolysis, indicating that hydroxyl radicals may be generated or penetrated at the sites of PAHs solubilized in the micelles. Additionally, a smaller rate enhancement by UV/H2O2 in micelles than in water suggests that micelles provide some degree of protection from hydroxyl radical attack. The possibility of recoveryand reuse of PFS has been demonstrated by measuring the solubilizing capacity of APFO after direct photolysis and UV/H2O2 process. Overall, this study demonstrates UV/H2O2 process can be an effective treatment method for notonly PAH degradation but also surfactant recovery and reuse. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 08:04:34