Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maize

Detalhes bibliográficos
Autor(a) principal: Paes,Juliana L.
Data de Publicação: 2011
Outros Autores: Faroni,Lêda R. A., Martins,Marcio A., Dhingra,Onkar D., Silva,Tales A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662011000300011
Resumo: The purpose of this work was to evaluate the transport of allyl isothiocyanate (AITC) by means of the sorption mechanism and the diffusion of AITC through maize grains. The experimental procedure to study the sorption mechanism was conducted by injection of AITC in glass flasks containing the grains. Kinetic models of zero, first and second order were fitted to AITC concentration data, with the purpose of determining the sorption rate (k). For the study of diffusion, a prototype was utilized in which the components are a gas chamber and a cylindrical column in which the grains were stored. At the interval of 110 min, samples in the chamber and in the column were collected, which were immediately injected into the gas chromatograph. In order to determine the effective diffusion coefficient (Def) of AITC through maize grains, the term referring to the sorption rate was added to the diffusion equation. The kinetic model of the first order was the one that best fitted the experimental data for the sorption mechanism, and k was 6.26 x 10-4 s-1. The Def of AITC through grains was 7.2 x 10-3 cm² s-1. It was concluded that the transport of AITC through maize grains is slow, due to the low value of Def and high sorption rate of this component by the grains.
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spelling Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maizefumiganteffective diffusion coefficientsorption rateThe purpose of this work was to evaluate the transport of allyl isothiocyanate (AITC) by means of the sorption mechanism and the diffusion of AITC through maize grains. The experimental procedure to study the sorption mechanism was conducted by injection of AITC in glass flasks containing the grains. Kinetic models of zero, first and second order were fitted to AITC concentration data, with the purpose of determining the sorption rate (k). For the study of diffusion, a prototype was utilized in which the components are a gas chamber and a cylindrical column in which the grains were stored. At the interval of 110 min, samples in the chamber and in the column were collected, which were immediately injected into the gas chromatograph. In order to determine the effective diffusion coefficient (Def) of AITC through maize grains, the term referring to the sorption rate was added to the diffusion equation. The kinetic model of the first order was the one that best fitted the experimental data for the sorption mechanism, and k was 6.26 x 10-4 s-1. The Def of AITC through grains was 7.2 x 10-3 cm² s-1. It was concluded that the transport of AITC through maize grains is slow, due to the low value of Def and high sorption rate of this component by the grains.Departamento de Engenharia Agrícola - UFCG2011-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662011000300011Revista Brasileira de Engenharia Agrícola e Ambiental v.15 n.3 2011reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)instname:Universidade Federal de Campina Grande (UFCG)instacron:UFCG10.1590/S1415-43662011000300011info:eu-repo/semantics/openAccessPaes,Juliana L.Faroni,Lêda R. A.Martins,Marcio A.Dhingra,Onkar D.Silva,Tales A.eng2011-02-25T00:00:00Zoai:scielo:S1415-43662011000300011Revistahttp://www.scielo.br/rbeaaPUBhttps://old.scielo.br/oai/scielo-oai.php||agriambi@agriambi.com.br1807-19291415-4366opendoar:2011-02-25T00:00Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)false
dc.title.none.fl_str_mv Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maize
title Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maize
spellingShingle Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maize
Paes,Juliana L.
fumigant
effective diffusion coefficient
sorption rate
title_short Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maize
title_full Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maize
title_fullStr Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maize
title_full_unstemmed Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maize
title_sort Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maize
author Paes,Juliana L.
author_facet Paes,Juliana L.
Faroni,Lêda R. A.
Martins,Marcio A.
Dhingra,Onkar D.
Silva,Tales A.
author_role author
author2 Faroni,Lêda R. A.
Martins,Marcio A.
Dhingra,Onkar D.
Silva,Tales A.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Paes,Juliana L.
Faroni,Lêda R. A.
Martins,Marcio A.
Dhingra,Onkar D.
Silva,Tales A.
dc.subject.por.fl_str_mv fumigant
effective diffusion coefficient
sorption rate
topic fumigant
effective diffusion coefficient
sorption rate
description The purpose of this work was to evaluate the transport of allyl isothiocyanate (AITC) by means of the sorption mechanism and the diffusion of AITC through maize grains. The experimental procedure to study the sorption mechanism was conducted by injection of AITC in glass flasks containing the grains. Kinetic models of zero, first and second order were fitted to AITC concentration data, with the purpose of determining the sorption rate (k). For the study of diffusion, a prototype was utilized in which the components are a gas chamber and a cylindrical column in which the grains were stored. At the interval of 110 min, samples in the chamber and in the column were collected, which were immediately injected into the gas chromatograph. In order to determine the effective diffusion coefficient (Def) of AITC through maize grains, the term referring to the sorption rate was added to the diffusion equation. The kinetic model of the first order was the one that best fitted the experimental data for the sorption mechanism, and k was 6.26 x 10-4 s-1. The Def of AITC through grains was 7.2 x 10-3 cm² s-1. It was concluded that the transport of AITC through maize grains is slow, due to the low value of Def and high sorption rate of this component by the grains.
publishDate 2011
dc.date.none.fl_str_mv 2011-03-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662011000300011
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dc.language.iso.fl_str_mv eng
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dc.publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
dc.source.none.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental v.15 n.3 2011
reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
instname:Universidade Federal de Campina Grande (UFCG)
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instname_str Universidade Federal de Campina Grande (UFCG)
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repository.name.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)
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