Adsorption of Cu2+ ions on humic acids

Detalhes bibliográficos
Autor(a) principal: Jordão,Cláudio Pereira
Data de Publicação: 2001
Outros Autores: Reis,César, Bellato,Carlos Roberto, Jham,Gulab Newandram, Pereira,José Luis
Tipo de documento: Artigo
Idioma: eng
Título da fonte: REM. Revista Escola de Minas (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672001000200006
Resumo: Commercial samples of humic acids (Fluka AG) were used to evaluate the adsorption behaviour of Cu2+ ions. The mathematical model described by Langmuir's adsorption equation was applied and the values of the maximum adsorption capacity b and those of the constant related to the bonding energy a were obtained. Aliquots of copper nitrate solutions with different copper concentrations were added to the humic acid suspensions at constant pH values (4.0 and 5.0). The Langmuir isotherms presented two distinct adsorption regions, showing that the adsorptive phenomenon occurs in two distinct steps according to the copper-humic site interaction. Samples of humic acids showed higher maximum adsorption capacity at pH 5 than at pH 4, while the constant a related to bonding energy was higher at pH 4.
id ESCOLADEMINAS-1_5dd654d67e2deff0b714b04cbe67bcd7
oai_identifier_str oai:scielo:S0370-44672001000200006
network_acronym_str ESCOLADEMINAS-1
network_name_str REM. Revista Escola de Minas (Online)
repository_id_str
spelling Adsorption of Cu2+ ions on humic acidshumic acidscopperadsorptionisothermCommercial samples of humic acids (Fluka AG) were used to evaluate the adsorption behaviour of Cu2+ ions. The mathematical model described by Langmuir's adsorption equation was applied and the values of the maximum adsorption capacity b and those of the constant related to the bonding energy a were obtained. Aliquots of copper nitrate solutions with different copper concentrations were added to the humic acid suspensions at constant pH values (4.0 and 5.0). The Langmuir isotherms presented two distinct adsorption regions, showing that the adsorptive phenomenon occurs in two distinct steps according to the copper-humic site interaction. Samples of humic acids showed higher maximum adsorption capacity at pH 5 than at pH 4, while the constant a related to bonding energy was higher at pH 4.Escola de Minas2001-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672001000200006Rem: Revista Escola de Minas v.54 n.2 2001reponame:REM. Revista Escola de Minas (Online)instname:Escola de Minasinstacron:ESCOLA DE MINAS10.1590/S0370-44672001000200006info:eu-repo/semantics/openAccessJordão,Cláudio PereiraReis,CésarBellato,Carlos RobertoJham,Gulab NewandramPereira,José Luiseng2003-08-22T00:00:00Zoai:scielo:S0370-44672001000200006Revistahttp://www.scielo.br/remhttps://old.scielo.br/oai/scielo-oai.phpeditor@rem.com.br1807-03530370-4467opendoar:2003-08-22T00:00REM. Revista Escola de Minas (Online) - Escola de Minasfalse
dc.title.none.fl_str_mv Adsorption of Cu2+ ions on humic acids
title Adsorption of Cu2+ ions on humic acids
spellingShingle Adsorption of Cu2+ ions on humic acids
Jordão,Cláudio Pereira
humic acids
copper
adsorption
isotherm
title_short Adsorption of Cu2+ ions on humic acids
title_full Adsorption of Cu2+ ions on humic acids
title_fullStr Adsorption of Cu2+ ions on humic acids
title_full_unstemmed Adsorption of Cu2+ ions on humic acids
title_sort Adsorption of Cu2+ ions on humic acids
author Jordão,Cláudio Pereira
author_facet Jordão,Cláudio Pereira
Reis,César
Bellato,Carlos Roberto
Jham,Gulab Newandram
Pereira,José Luis
author_role author
author2 Reis,César
Bellato,Carlos Roberto
Jham,Gulab Newandram
Pereira,José Luis
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Jordão,Cláudio Pereira
Reis,César
Bellato,Carlos Roberto
Jham,Gulab Newandram
Pereira,José Luis
dc.subject.por.fl_str_mv humic acids
copper
adsorption
isotherm
topic humic acids
copper
adsorption
isotherm
description Commercial samples of humic acids (Fluka AG) were used to evaluate the adsorption behaviour of Cu2+ ions. The mathematical model described by Langmuir's adsorption equation was applied and the values of the maximum adsorption capacity b and those of the constant related to the bonding energy a were obtained. Aliquots of copper nitrate solutions with different copper concentrations were added to the humic acid suspensions at constant pH values (4.0 and 5.0). The Langmuir isotherms presented two distinct adsorption regions, showing that the adsorptive phenomenon occurs in two distinct steps according to the copper-humic site interaction. Samples of humic acids showed higher maximum adsorption capacity at pH 5 than at pH 4, while the constant a related to bonding energy was higher at pH 4.
publishDate 2001
dc.date.none.fl_str_mv 2001-06-01
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=S0370-44672001000200006
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672001000200006
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0370-44672001000200006
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 Escola de Minas
publisher.none.fl_str_mv Escola de Minas
dc.source.none.fl_str_mv Rem: Revista Escola de Minas v.54 n.2 2001
reponame:REM. Revista Escola de Minas (Online)
instname:Escola de Minas
instacron:ESCOLA DE MINAS
instname_str Escola de Minas
instacron_str ESCOLA DE MINAS
institution ESCOLA DE MINAS
reponame_str REM. Revista Escola de Minas (Online)
collection REM. Revista Escola de Minas (Online)
repository.name.fl_str_mv REM. Revista Escola de Minas (Online) - Escola de Minas
repository.mail.fl_str_mv editor@rem.com.br
_version_ 1754122195858096128

Registros relacionados