Influence of NO2 and metal ions on oxidation of aqueous-phase S(IV) in atmospheric concentrations

Detalhes bibliográficos
Autor(a) principal: Martins, Cláudia Rocha
Data de Publicação: 2008
Outros Autores: Alves, Janete J. F., Carvalho, Wanessa B. D., Cardoso, Cristiane S. C., Andrade, Jailson Bittencourt de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6130
Resumo: p. 279-290
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spelling Martins, Cláudia RochaAlves, Janete J. F.Carvalho, Wanessa B. D.Cardoso, Cristiane S. C.Andrade, Jailson Bittencourt deMartins, Cláudia RochaAlves, Janete J. F.Carvalho, Wanessa B. D.Cardoso, Cristiane S. C.Andrade, Jailson Bittencourt de2012-06-14T11:36:50Z2012-06-14T11:36:50Z20080001-3765http://www.repositorio.ufba.br/ri/handle/ri/6130v. 80, n. 2p. 279-290An investigation was made of the influence of atmospheric concentrations (15 or 130 ppbv) of NO2 on the aqueous-phase oxidation rate of S(IV) in the presence and absence of Fe(III), Mn(II) and Cr(VI) metal ions under controlled experimental conditions (pH, T, concentration of reactants, etc.). The reaction rate in the presence of the NO2 flow was slower than the reaction rate using only clean air with an initial S(IV) concentration of 10-4 mol/L. NO2 appears to react with S(IV), producing a kind of inhibitor that slows down the reaction. Conversely, tenfold lower concentrations of S(IV) ([S(IV)]º = 10-5 mol/L) caused a faster reaction in the presence of NO2 than the reaction using purified air. Under these conditions, therefore, the equilibrium shifts to sulfate formation. With the addition of Fe(III), Mn(II) or Cr(VI) in the presence of a NO2 flow, the reaction occurred faster under all the conditions in which S(IV) oxidation was investigated.Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-06-14T11:36:50Z No. of bitstreams: 1 __www.scielo.br_pdf_aabc_v80n2_a06v80n2.pdf: 224553 bytes, checksum: 67fed68cdbb73ae5500618040cafeddf (MD5)Made available in DSpace on 2012-06-14T11:36:50Z (GMT). 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dc.title.pt_BR.fl_str_mv Influence of NO2 and metal ions on oxidation of aqueous-phase S(IV) in atmospheric concentrations
dc.title.alternative.pt_BR.fl_str_mv Anais da Academia Brasileira de Ciências
title Influence of NO2 and metal ions on oxidation of aqueous-phase S(IV) in atmospheric concentrations
spellingShingle Influence of NO2 and metal ions on oxidation of aqueous-phase S(IV) in atmospheric concentrations
Martins, Cláudia Rocha
aqueous S(IV) oxidation
metal ions
NO2
acid rain formation
title_short Influence of NO2 and metal ions on oxidation of aqueous-phase S(IV) in atmospheric concentrations
title_full Influence of NO2 and metal ions on oxidation of aqueous-phase S(IV) in atmospheric concentrations
title_fullStr Influence of NO2 and metal ions on oxidation of aqueous-phase S(IV) in atmospheric concentrations
title_full_unstemmed Influence of NO2 and metal ions on oxidation of aqueous-phase S(IV) in atmospheric concentrations
title_sort Influence of NO2 and metal ions on oxidation of aqueous-phase S(IV) in atmospheric concentrations
author Martins, Cláudia Rocha
author_facet Martins, Cláudia Rocha
Alves, Janete J. F.
Carvalho, Wanessa B. D.
Cardoso, Cristiane S. C.
Andrade, Jailson Bittencourt de
author_role author
author2 Alves, Janete J. F.
Carvalho, Wanessa B. D.
Cardoso, Cristiane S. C.
Andrade, Jailson Bittencourt de
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Martins, Cláudia Rocha
Alves, Janete J. F.
Carvalho, Wanessa B. D.
Cardoso, Cristiane S. C.
Andrade, Jailson Bittencourt de
Martins, Cláudia Rocha
Alves, Janete J. F.
Carvalho, Wanessa B. D.
Cardoso, Cristiane S. C.
Andrade, Jailson Bittencourt de
dc.subject.por.fl_str_mv aqueous S(IV) oxidation
metal ions
NO2
acid rain formation
topic aqueous S(IV) oxidation
metal ions
NO2
acid rain formation
description p. 279-290
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2012-06-14T11:36:50Z
dc.date.available.fl_str_mv 2012-06-14T11:36:50Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/6130
dc.identifier.issn.none.fl_str_mv 0001-3765
dc.identifier.number.pt_BR.fl_str_mv v. 80, n. 2
identifier_str_mv 0001-3765
v. 80, n. 2
url http://www.repositorio.ufba.br/ri/handle/ri/6130
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1590/S0001-37652008000200006
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
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instname_str Universidade Federal da Bahia (UFBA)
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institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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