Relative lability of trace metals Complexed in aquatic humic substances using Ion-Exchanger cellulose-hyphan
Autor(a) principal: | |
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Data de Publicação: | 1997 |
Outros Autores: | , |
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=S0103-50531997000300010 |
Resumo: | The purpose of this paper is to characterize the lability/inertness metal fractions complexed by aquatic humic substances (HS) in relation to pH, complexation time, and HS concentration. HS were preconcentrated by ultrafiltration and complexed with bivalent metal ions. These fractions were characterized by ion exchange with the chelating collector cellulose Hyphan by applying batch procedure. The metals were determined by atomic absorption spectrometry. The results show that the distribution coefficients, Kd, decreased with HS presence, and that the relative lability of metal fractions complexed by HS is dependent on variables such as pH, complexation time, and HS concentration. Until c.a. 15 min, the metal change between aquatic HS and ion exchanger occurs following a 2nd order reaction. Afterwards, the remaining metal fraction in the HS reacts following a 1st order reaction. For traces of metal ions bound to dissolved HS, the lability orderPb > Mn > Cd, Ni > Cu is revealed. |
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Journal of the Brazilian Chemical Society (Online) |
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Relative lability of trace metals Complexed in aquatic humic substances using Ion-Exchanger cellulose-hyphanaquatic humic substancesion-exchangemetal complexationThe purpose of this paper is to characterize the lability/inertness metal fractions complexed by aquatic humic substances (HS) in relation to pH, complexation time, and HS concentration. HS were preconcentrated by ultrafiltration and complexed with bivalent metal ions. These fractions were characterized by ion exchange with the chelating collector cellulose Hyphan by applying batch procedure. The metals were determined by atomic absorption spectrometry. The results show that the distribution coefficients, Kd, decreased with HS presence, and that the relative lability of metal fractions complexed by HS is dependent on variables such as pH, complexation time, and HS concentration. Until c.a. 15 min, the metal change between aquatic HS and ion exchanger occurs following a 2nd order reaction. Afterwards, the remaining metal fraction in the HS reacts following a 1st order reaction. For traces of metal ions bound to dissolved HS, the lability orderPb > Mn > Cd, Ni > Cu is revealed.Sociedade Brasileira de Química1997-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000300010Journal of the Brazilian Chemical Society v.8 n.3 1997reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50531997000300010info:eu-repo/semantics/openAccessRocha,Julio CToscano,Ilda A.SCardoso,Arnaldo Aeng2011-01-31T00:00:00Zoai:scielo:S0103-50531997000300010Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2011-01-31T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Relative lability of trace metals Complexed in aquatic humic substances using Ion-Exchanger cellulose-hyphan |
title |
Relative lability of trace metals Complexed in aquatic humic substances using Ion-Exchanger cellulose-hyphan |
spellingShingle |
Relative lability of trace metals Complexed in aquatic humic substances using Ion-Exchanger cellulose-hyphan Rocha,Julio C aquatic humic substances ion-exchange metal complexation |
title_short |
Relative lability of trace metals Complexed in aquatic humic substances using Ion-Exchanger cellulose-hyphan |
title_full |
Relative lability of trace metals Complexed in aquatic humic substances using Ion-Exchanger cellulose-hyphan |
title_fullStr |
Relative lability of trace metals Complexed in aquatic humic substances using Ion-Exchanger cellulose-hyphan |
title_full_unstemmed |
Relative lability of trace metals Complexed in aquatic humic substances using Ion-Exchanger cellulose-hyphan |
title_sort |
Relative lability of trace metals Complexed in aquatic humic substances using Ion-Exchanger cellulose-hyphan |
author |
Rocha,Julio C |
author_facet |
Rocha,Julio C Toscano,Ilda A.S Cardoso,Arnaldo A |
author_role |
author |
author2 |
Toscano,Ilda A.S Cardoso,Arnaldo A |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Rocha,Julio C Toscano,Ilda A.S Cardoso,Arnaldo A |
dc.subject.por.fl_str_mv |
aquatic humic substances ion-exchange metal complexation |
topic |
aquatic humic substances ion-exchange metal complexation |
description |
The purpose of this paper is to characterize the lability/inertness metal fractions complexed by aquatic humic substances (HS) in relation to pH, complexation time, and HS concentration. HS were preconcentrated by ultrafiltration and complexed with bivalent metal ions. These fractions were characterized by ion exchange with the chelating collector cellulose Hyphan by applying batch procedure. The metals were determined by atomic absorption spectrometry. The results show that the distribution coefficients, Kd, decreased with HS presence, and that the relative lability of metal fractions complexed by HS is dependent on variables such as pH, complexation time, and HS concentration. Until c.a. 15 min, the metal change between aquatic HS and ion exchanger occurs following a 2nd order reaction. Afterwards, the remaining metal fraction in the HS reacts following a 1st order reaction. For traces of metal ions bound to dissolved HS, the lability orderPb > Mn > Cd, Ni > Cu is revealed. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-06-01 |
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=S0103-50531997000300010 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000300010 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50531997000300010 |
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.8 n.3 1997 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 |
_version_ |
1750318163026771968 |