Speeding up HCl extractions by employing ultrasound energy to evaluate trace elements bioavailability in sediments

Detalhes bibliográficos
Autor(a) principal: Hatje,Vanessa
Data de Publicação: 2009
Outros Autores: Costa,Letícia M., Korn,Maria Graças A., Cotrim,Gabriel
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000500007
Resumo: A three factors analysis of variance was used to test the significance of the type of vessel, the type of material and the number of replicates in the preparation of sediment samples using an ultrasonic bath. The conventional extraction with HCl 1.0 mol L-1, for 0.5, 4 and 12 h, has been modified, applying an ultrasonic bath, in order to speeding up the sample preparation time. Trace metals were measured by an ICP OES. The best results were obtained using a Teflon® vessel with a flat bottom. For all metals but Ni it was demonstrated the feasibility of working in triplicates in the ultrasonic bath, without compromising the efficiency and/or the precision of the extraction. Leaching efficiency enhanced with increasing sonication time from 1 to 50 min. For most elements the ultrasound-assisted leaching could reduce the conventional extraction time from 12 h to 50 min or even less (i.e. 6 min for Pb). The precision obtained was comparable to values obtained for the conventional acid extraction. The proposed method is a fast, inexpensive and easy alternative for screening of the potential mobility and bioavailability of metals in sediments.
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spelling Speeding up HCl extractions by employing ultrasound energy to evaluate trace elements bioavailability in sedimentsultrasonic bathsample preparationbioavailable metalssedimentA three factors analysis of variance was used to test the significance of the type of vessel, the type of material and the number of replicates in the preparation of sediment samples using an ultrasonic bath. The conventional extraction with HCl 1.0 mol L-1, for 0.5, 4 and 12 h, has been modified, applying an ultrasonic bath, in order to speeding up the sample preparation time. Trace metals were measured by an ICP OES. The best results were obtained using a Teflon® vessel with a flat bottom. For all metals but Ni it was demonstrated the feasibility of working in triplicates in the ultrasonic bath, without compromising the efficiency and/or the precision of the extraction. Leaching efficiency enhanced with increasing sonication time from 1 to 50 min. For most elements the ultrasound-assisted leaching could reduce the conventional extraction time from 12 h to 50 min or even less (i.e. 6 min for Pb). The precision obtained was comparable to values obtained for the conventional acid extraction. The proposed method is a fast, inexpensive and easy alternative for screening of the potential mobility and bioavailability of metals in sediments.Sociedade Brasileira de Química2009-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000500007Journal of the Brazilian Chemical Society v.20 n.5 2009reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532009000500007info:eu-repo/semantics/openAccessHatje,VanessaCosta,Letícia M.Korn,Maria Graças A.Cotrim,Gabrieleng2009-06-29T00:00:00Zoai:scielo:S0103-50532009000500007Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2009-06-29T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Speeding up HCl extractions by employing ultrasound energy to evaluate trace elements bioavailability in sediments
title Speeding up HCl extractions by employing ultrasound energy to evaluate trace elements bioavailability in sediments
spellingShingle Speeding up HCl extractions by employing ultrasound energy to evaluate trace elements bioavailability in sediments
Hatje,Vanessa
ultrasonic bath
sample preparation
bioavailable metals
sediment
title_short Speeding up HCl extractions by employing ultrasound energy to evaluate trace elements bioavailability in sediments
title_full Speeding up HCl extractions by employing ultrasound energy to evaluate trace elements bioavailability in sediments
title_fullStr Speeding up HCl extractions by employing ultrasound energy to evaluate trace elements bioavailability in sediments
title_full_unstemmed Speeding up HCl extractions by employing ultrasound energy to evaluate trace elements bioavailability in sediments
title_sort Speeding up HCl extractions by employing ultrasound energy to evaluate trace elements bioavailability in sediments
author Hatje,Vanessa
author_facet Hatje,Vanessa
Costa,Letícia M.
Korn,Maria Graças A.
Cotrim,Gabriel
author_role author
author2 Costa,Letícia M.
Korn,Maria Graças A.
Cotrim,Gabriel
author2_role author
author
author
dc.contributor.author.fl_str_mv Hatje,Vanessa
Costa,Letícia M.
Korn,Maria Graças A.
Cotrim,Gabriel
dc.subject.por.fl_str_mv ultrasonic bath
sample preparation
bioavailable metals
sediment
topic ultrasonic bath
sample preparation
bioavailable metals
sediment
description A three factors analysis of variance was used to test the significance of the type of vessel, the type of material and the number of replicates in the preparation of sediment samples using an ultrasonic bath. The conventional extraction with HCl 1.0 mol L-1, for 0.5, 4 and 12 h, has been modified, applying an ultrasonic bath, in order to speeding up the sample preparation time. Trace metals were measured by an ICP OES. The best results were obtained using a Teflon® vessel with a flat bottom. For all metals but Ni it was demonstrated the feasibility of working in triplicates in the ultrasonic bath, without compromising the efficiency and/or the precision of the extraction. Leaching efficiency enhanced with increasing sonication time from 1 to 50 min. For most elements the ultrasound-assisted leaching could reduce the conventional extraction time from 12 h to 50 min or even less (i.e. 6 min for Pb). The precision obtained was comparable to values obtained for the conventional acid extraction. The proposed method is a fast, inexpensive and easy alternative for screening of the potential mobility and bioavailability of metals in sediments.
publishDate 2009
dc.date.none.fl_str_mv 2009-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000500007
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000500007
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532009000500007
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.20 n.5 2009
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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