Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Influence of NO2 and dissolved iron on the S(IV) oxidation in synthetic aqueous solution
Autore:
Tursic, J; Grgic, I; Bizjak, M;
Indirizzi:
Natl Inst Chem, SI-1000 Ljubljana, Slovenia Natl Inst Chem Ljubljana Slovenia SI-1000 m, SI-1000 Ljubljana, Slovenia
Titolo Testata:
ATMOSPHERIC ENVIRONMENT
fascicolo: 1, volume: 35, anno: 2001,
pagine: 97 - 104
SICI:
1352-2310(2001)35:1<97:IONADI>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
METAL-IONS; NITROGEN-DIOXIDE; CATALYZED OXIDATION; SULFUR(IV) OXIDES; LIQUID WATER; BISULFITE SOLUTIONS; KINETICS; AUTOXIDATION; SULFITE; MECHANISM;
Keywords:
acid rain formation; aqueous S(IV) oxidation; iron; NO2;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Grgic, I Natl Inst Chem, Hajdrihova 19,POB 3430, SI-1000 Ljubljana, Slovenia Natl Inst Chem Hajdrihova 19,POB 3430 Ljubljana Slovenia SI-1000
Citazione:
J. Tursic et al., "Influence of NO2 and dissolved iron on the S(IV) oxidation in synthetic aqueous solution", ATMOS ENVIR, 35(1), 2001, pp. 97-104

Abstract

The influence of dissolved NO2 and iron on the oxidation rate of S(IV) species in the presence of dissolved oxygen is presented. To match the conditions in the real environment, the concentration of iron in the reaction solution and trace gases in the gas mixture was typical for a polluted atmosphere. The time dependence of HSO3-, SO42-, NO42- and NO3- and the concentration ratio between Fe(II) and total dissolved iron were monitored. Sulphate formation was the most intensive in the presence of an SO2/NO2/air gas mixture and Fe(III) in solution. The highest contribution to the overall oxidation was from Fe-catalysed S(IV) autoxidation. The reaction rate in the presence of both components was equal to the sum of the reaction rates when NO2 and Fe(III) were present separately, indicating that under selected experimental conditions there exist two systems: SO2/NO2/air and SO2/NO2/air/Fe(III), which are unlikely to interact with each other. The radical chain mechanism can be initiated via reactions Fe(III)-HSO3- and NO2-SO32-/HO3-. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 09:03:35