Relative lability of trace metals complexed in aquatic humic substances using ion-exchanger cellulose-hyphan
Main Author: | |
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Publication Date: | 1997 |
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Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UNESP |
Download full: | http://dx.doi.org/10.1590/S0103-50531997000300010 http://hdl.handle.net/11449/65294 |
Summary: | 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 2 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. ©1997 Soc. Bras. Química. |
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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 2 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. ©1997 Soc. Bras. Química.Depto. de Quim. Analítica Inst. de Quim. de Araraquara- UNESP, C.P. 355, 14800-900 Araraquara - SPDepto. de Quim. Analítica Inst. de Quim. de Araraquara- UNESP, C.P. 355, 14800-900 Araraquara - SPUniversidade Estadual Paulista (Unesp)Rocha, Julio Cesar [UNESP]Toscano, Ilda A. S. [UNESP]Cardoso, Arnaldo Alves [UNESP]2014-05-27T11:18:18Z2014-05-27T11:18:18Z1997-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article239-243application/pdfhttp://dx.doi.org/10.1590/S0103-50531997000300010Journal of the Brazilian Chemical Society, v. 8, n. 3, p. 239-243, 1997.0103-5053http://hdl.handle.net/11449/6529410.1590/S0103-50531997000300010S0103-50531997000300010WOS:A1997XG435000102-s2.0-188444451442-s2.0-18844445144.pdf41488374036182079165109840414837Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Brazilian Chemical Society1.4440,357info:eu-repo/semantics/openAccess2023-11-08T06:10:46Zoai:repositorio.unesp.br:11449/65294Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-08T06:10:46Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)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 Cesar [UNESP] 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 Cesar [UNESP] |
author_facet |
Rocha, Julio Cesar [UNESP] Toscano, Ilda A. S. [UNESP] Cardoso, Arnaldo Alves [UNESP] |
author_role |
author |
author2 |
Toscano, Ilda A. S. [UNESP] Cardoso, Arnaldo Alves [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Rocha, Julio Cesar [UNESP] Toscano, Ilda A. S. [UNESP] Cardoso, Arnaldo Alves [UNESP] |
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 2 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. ©1997 Soc. Bras. Química. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-12-01 2014-05-27T11:18:18Z 2014-05-27T11:18:18Z |
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://dx.doi.org/10.1590/S0103-50531997000300010 Journal of the Brazilian Chemical Society, v. 8, n. 3, p. 239-243, 1997. 0103-5053 http://hdl.handle.net/11449/65294 10.1590/S0103-50531997000300010 S0103-50531997000300010 WOS:A1997XG43500010 2-s2.0-18844445144 2-s2.0-18844445144.pdf 4148837403618207 9165109840414837 |
url |
http://dx.doi.org/10.1590/S0103-50531997000300010 http://hdl.handle.net/11449/65294 |
identifier_str_mv |
Journal of the Brazilian Chemical Society, v. 8, n. 3, p. 239-243, 1997. 0103-5053 10.1590/S0103-50531997000300010 S0103-50531997000300010 WOS:A1997XG43500010 2-s2.0-18844445144 2-s2.0-18844445144.pdf 4148837403618207 9165109840414837 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of the Brazilian Chemical Society 1.444 0,357 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
239-243 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964860302229504 |