Multi-parametric evaluation of the chemical ultrasonic irradiation effects in a heterogeneous metal-water system

Detalhes bibliográficos
Autor(a) principal: Souza, S. R.
Data de Publicação: 1998
Outros Autores: Korn, Mauro, Carvalho, L. R. F. de, Korn, Maria das Graças Andrade, Tavares, Marina Franco Maggi
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/8319
Resumo: Texto completo: acesso restrito. p.595–602
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spelling Souza, S. R.Korn, MauroCarvalho, L. R. F. deKorn, Maria das Graças AndradeTavares, Marina Franco MaggiSouza, S. R.Korn, MauroCarvalho, L. R. F. deKorn, Maria das Graças AndradeTavares, Marina Franco Maggi2013-02-01T11:25:52Z19980041-624Xhttp://www.repositorio.ufba.br/ri/handle/ri/8319v. 36, n. 1-5Texto completo: acesso restrito. p.595–602Sonochemical degradation of a metal in aqueous solution with ultrasound has been studied. Chemical effects in the heterogeneous system were evaluated and relationships between formed and consumed species during the sonication process were established statistically, employing factor analysis. Chemical species, such as hydrogen peroxide, nitrate, nitrite and zinc species were generated in a single heterogeneous zinc-water system under ultrasonic irradiation and their concentrations were determined. Different times of irradiation exposure were employed and the composition of the irradiated solution was monitored by ion chromatography (IC), inductively coupled plasma atomic emission spectrometry (ICP-AES) and capillary electrophoresis (CE) techniques. Variations of the hydrogen ion and hydrogen peroxide concentrations were measured by potentiometric and spectrophotometric methods, respectively. The global covariance matrix of the variables was built from experimental data, including irradiation time, nitrite, nitrate, zinc and hydrogen peroxide concentrations, and pH variation. Based on the monitoring of species formed in sonicated solutions and the multi-parametric evaluation obtained from the covariance matrix, some correlation related to the formed and consumed species is shown. Nitrate, nitrite, zinc and hydrogen peroxide formation in aqueous solution is strongly dependent upon the irradiation exposure time. Furthermore, the pH increases slightly as the amount of nitrate and nitrite ions becomes constant. This later observation confirms the concept that hydrogen ions are consumed when nitrate and nitrite ions are formed. The pH increase during sonication of the zinc/water system reveals a rather different behavior when compared to the sonicated single pure water system. At the same sonication stage that nitrate and nitrite concentrations become practically constant, zinc concentration increases as hydrogen peroxide concentration increases. According to these observations, some chemical processes can be proposed. Hydrogen ions generated in sonicated solution are consumed by nitrate and nitrite ions formation. Hydrogen ions and hydrogen peroxide formed during sonication might react with metallic fragments originated eventually from corrosive action of the ultrasound. Zinc hydroxo-complexes are formed predominantly by hydroxyl ions generated during hydrogen peroxide reduction. On a smaller proportion, zinc hydroxo-complexes may be also formed due to the alkaline medium generated during hydrolysis of zinc ions.Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2013-02-01T11:25:52Z No. of bitstreams: 1 Souza.pdf: 929714 bytes, checksum: 7c0a98094161d1a858a1f7acd5ac669b (MD5)Made available in DSpace on 2013-02-01T11:25:52Z (GMT). No. of bitstreams: 1 Souza.pdf: 929714 bytes, checksum: 7c0a98094161d1a858a1f7acd5ac669b (MD5) Previous issue date: 1998http://dx.doi.org/10.1016/S0041-624X(97)00112-1reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAHeterogeneous metal/water systemSonochemical effectsFactor analysisMulti-parametric evaluation of the chemical ultrasonic irradiation effects in a heterogeneous metal-water systemUltrasonicsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01enginfo:eu-repo/semantics/openAccessLICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/8319/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52ORIGINALSouza.pdfSouza.pdfapplication/pdf929714https://repositorio.ufba.br/bitstream/ri/8319/1/Souza.pdf7c0a98094161d1a858a1f7acd5ac669bMD51TEXTSouza.pdf.txtSouza.pdf.txtExtracted texttext/plain33415https://repositorio.ufba.br/bitstream/ri/8319/3/Souza.pdf.txt573588a602c377cbd32460db5cf8f7cfMD53ri/83192022-07-05 14:03:42.638oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:42Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Multi-parametric evaluation of the chemical ultrasonic irradiation effects in a heterogeneous metal-water system
dc.title.alternative.pt_BR.fl_str_mv Ultrasonics
title Multi-parametric evaluation of the chemical ultrasonic irradiation effects in a heterogeneous metal-water system
spellingShingle Multi-parametric evaluation of the chemical ultrasonic irradiation effects in a heterogeneous metal-water system
Souza, S. R.
Heterogeneous metal/water system
Sonochemical effects
Factor analysis
title_short Multi-parametric evaluation of the chemical ultrasonic irradiation effects in a heterogeneous metal-water system
title_full Multi-parametric evaluation of the chemical ultrasonic irradiation effects in a heterogeneous metal-water system
title_fullStr Multi-parametric evaluation of the chemical ultrasonic irradiation effects in a heterogeneous metal-water system
title_full_unstemmed Multi-parametric evaluation of the chemical ultrasonic irradiation effects in a heterogeneous metal-water system
title_sort Multi-parametric evaluation of the chemical ultrasonic irradiation effects in a heterogeneous metal-water system
author Souza, S. R.
author_facet Souza, S. R.
Korn, Mauro
Carvalho, L. R. F. de
Korn, Maria das Graças Andrade
Tavares, Marina Franco Maggi
author_role author
author2 Korn, Mauro
Carvalho, L. R. F. de
Korn, Maria das Graças Andrade
Tavares, Marina Franco Maggi
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Souza, S. R.
Korn, Mauro
Carvalho, L. R. F. de
Korn, Maria das Graças Andrade
Tavares, Marina Franco Maggi
Souza, S. R.
Korn, Mauro
Carvalho, L. R. F. de
Korn, Maria das Graças Andrade
Tavares, Marina Franco Maggi
dc.subject.por.fl_str_mv Heterogeneous metal/water system
Sonochemical effects
Factor analysis
topic Heterogeneous metal/water system
Sonochemical effects
Factor analysis
description Texto completo: acesso restrito. p.595–602
publishDate 1998
dc.date.issued.fl_str_mv 1998
dc.date.accessioned.fl_str_mv 2013-02-01T11:25:52Z
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/8319
dc.identifier.issn.none.fl_str_mv 0041-624X
dc.identifier.number.pt_BR.fl_str_mv v. 36, n. 1-5
identifier_str_mv 0041-624X
v. 36, n. 1-5
url http://www.repositorio.ufba.br/ri/handle/ri/8319
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/10.1016/S0041-624X(97)00112-1
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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instname_str Universidade Federal da Bahia (UFBA)
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collection Repositório Institucional da UFBA
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