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Titolo:
Sonolysis of 2,4-dichlorophenoxyacetic acid in aqueous solutions. Evidencefor (OH)-O-center dot-radical-mediated degradation
Autore:
Peller, J; Wiest, O; Kamat, PV;
Indirizzi:
Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA Univ Notre Dame Notre Dame IN USA 46556 Biochem, Notre Dame, IN 46556 USA Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556 USA Univ Notre Dame Notre Dame IN USA 46556 iat Lab, Notre Dame, IN 46556 USA
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY A
fascicolo: 13, volume: 105, anno: 2001,
pagine: 3176 - 3181
SICI:
1089-5639(20010405)105:13<3176:SO2AIA>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTOCATALYTIC DEGRADATION; SONOCHEMICAL DEGRADATION; HYDROGEN-PEROXIDE; OXIDATION; ULTRASOUND; WATER; 4-CHLOROPHENOL; OZONOLYSIS; HERBICIDES; PATHWAY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Wiest, O Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA Univ Notre Dame Notre Dame IN USA 46556 Notre Dame, IN 46556 USA
Citazione:
J. Peller et al., "Sonolysis of 2,4-dichlorophenoxyacetic acid in aqueous solutions. Evidencefor (OH)-O-center dot-radical-mediated degradation", J PHYS CH A, 105(13), 2001, pp. 3176-3181

Abstract

2,4-dichlorophenoxyacetic acid (2,4-D) undergoes efficient degradation when an O-2- or Ar-saturated aqueous solution is subjected to high-frequency (640 kHz) sonolysis. 2,4-dichlorophenol, hydroquinone, and catechol are major reaction intermediates common to various experimental conditions. The similarities between the reaction intermediates of sonolytic and radiolytic reactions indicate (OH)-O-. radical as the primary reactive species responsible for 2,4-D degradation. Very little 2,4-D degradation occurs if the sonolysis is carried out in the presence of the (OH)-O-. radical scavenger tert-butyl alcohol, also indicating that little or no pyrolysis of the compound occurs. Most of the 2,4-D eventually forms oxalic acid, which, unlike other(OH)-O-.-mediated oxidation methods, is not easily mineralized with high-frequency ultrasound.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 15:46:48