Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd

Autores
Debbaudt, Adriana Laura; Ferreira, María Luján; Gschaider, María Elena
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Chitosan, pectin and chitosan-pectin pellets were studied as adsorbents for Cd2+ from acidic aqueous solutions at selected conditions. Several adsorption sites were considered and adsorption mechanisms for the biopolymers-metal interactions are proposed taking into account theoretical and experimental results. Langmuir adsorption isotherms for Hg, Pb and Cd on pellets gave KL values of 796, 1551 and 7265Lmequiv.-1; their Memax (mequiv./g) being 0.027 (2.71 mg/g), 0.1075 (11.2 mg/g) and 0.022 (1.23 mg/g), respectively. Chitosan adsorption of Hg achieved 85-100% and 70-75% for Pb and Cd, respectively. Ci (initial concentration) was 47,045.4 μg/g chitosan for Pb, 6863.6 μg/g chitosan for Hg and 5.4436 μg/g chitosan for Cd. When pectin was the adsorbent 15% of Hg and not more than 4% Pb and Cd were adsorbed, Ci Pb being 9409.1 μg/g pectin Ci Hg=1372.7 μg/g pectin and Ci Cd=1064.5 μg/g pectin. In the case of pellets, 100% initial Hg, Cd and Pb present initially in solution were adsorbed, Ci Pb being=103.5 μg/g, Ci Hg=15 μg/g and Ci Cd=12 μg/g. Molecular mechanics (MM2) and PM3 calculations were done, trying to identify evidence of the proposed kinetic model and an explanation of the equilibrium uptake of the metal adsorption on chitosan-pectin pellets.
Fil: Debbaudt, Adriana Laura. Universidad Nacional del Sur. Departamento de Química; Argentina
Fil: Ferreira, María Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Nacional del Sur. Departamento de Química; Argentina
Fil: Gschaider, María Elena. Universidad Nacional del Sur. Departamento de Química; Argentina
Materia
BIOADSORBENTS
BIOPOLYMERS
CHITOSAN
PECTIN
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/126998
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/126998
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and CdDebbaudt, Adriana LauraFerreira, María LujánGschaider, María ElenaBIOADSORBENTSBIOPOLYMERSCHITOSANPECTINhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Chitosan, pectin and chitosan-pectin pellets were studied as adsorbents for Cd2+ from acidic aqueous solutions at selected conditions. Several adsorption sites were considered and adsorption mechanisms for the biopolymers-metal interactions are proposed taking into account theoretical and experimental results. Langmuir adsorption isotherms for Hg, Pb and Cd on pellets gave KL values of 796, 1551 and 7265Lmequiv.-1; their Memax (mequiv./g) being 0.027 (2.71 mg/g), 0.1075 (11.2 mg/g) and 0.022 (1.23 mg/g), respectively. Chitosan adsorption of Hg achieved 85-100% and 70-75% for Pb and Cd, respectively. Ci (initial concentration) was 47,045.4 μg/g chitosan for Pb, 6863.6 μg/g chitosan for Hg and 5.4436 μg/g chitosan for Cd. When pectin was the adsorbent 15% of Hg and not more than 4% Pb and Cd were adsorbed, Ci Pb being 9409.1 μg/g pectin Ci Hg=1372.7 μg/g pectin and Ci Cd=1064.5 μg/g pectin. In the case of pellets, 100% initial Hg, Cd and Pb present initially in solution were adsorbed, Ci Pb being=103.5 μg/g, Ci Hg=15 μg/g and Ci Cd=12 μg/g. Molecular mechanics (MM2) and PM3 calculations were done, trying to identify evidence of the proposed kinetic model and an explanation of the equilibrium uptake of the metal adsorption on chitosan-pectin pellets.Fil: Debbaudt, Adriana Laura. Universidad Nacional del Sur. Departamento de Química; ArgentinaFil: Ferreira, María Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Nacional del Sur. Departamento de Química; ArgentinaFil: Gschaider, María Elena. Universidad Nacional del Sur. Departamento de Química; ArgentinaElsevier2004-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/126998Debbaudt, Adriana Laura; Ferreira, María Luján; Gschaider, María Elena; Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd; Elsevier; Carbohydrate Polymers; 56; 3; 7-2004; 321-3320144-8617CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0144861704000645#!info:eu-repo/semantics/altIdentifier/doi/10.1016/j.carbpol.2004.02.009info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:46:55Zoai:ri.conicet.gov.ar:11336/126998instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:46:55.899CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd
title Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd
spellingShingle Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd
Debbaudt, Adriana Laura
BIOADSORBENTS
BIOPOLYMERS
CHITOSAN
PECTIN
title_short Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd
title_full Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd
title_fullStr Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd
title_full_unstemmed Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd
title_sort Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd
dc.creator.none.fl_str_mv Debbaudt, Adriana Laura
Ferreira, María Luján
Gschaider, María Elena
author Debbaudt, Adriana Laura
author_facet Debbaudt, Adriana Laura
Ferreira, María Luján
Gschaider, María Elena
author_role author
author2 Ferreira, María Luján
Gschaider, María Elena
author2_role author
author
dc.subject.none.fl_str_mv BIOADSORBENTS
BIOPOLYMERS
CHITOSAN
PECTIN
topic BIOADSORBENTS
BIOPOLYMERS
CHITOSAN
PECTIN
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Chitosan, pectin and chitosan-pectin pellets were studied as adsorbents for Cd2+ from acidic aqueous solutions at selected conditions. Several adsorption sites were considered and adsorption mechanisms for the biopolymers-metal interactions are proposed taking into account theoretical and experimental results. Langmuir adsorption isotherms for Hg, Pb and Cd on pellets gave KL values of 796, 1551 and 7265Lmequiv.-1; their Memax (mequiv./g) being 0.027 (2.71 mg/g), 0.1075 (11.2 mg/g) and 0.022 (1.23 mg/g), respectively. Chitosan adsorption of Hg achieved 85-100% and 70-75% for Pb and Cd, respectively. Ci (initial concentration) was 47,045.4 μg/g chitosan for Pb, 6863.6 μg/g chitosan for Hg and 5.4436 μg/g chitosan for Cd. When pectin was the adsorbent 15% of Hg and not more than 4% Pb and Cd were adsorbed, Ci Pb being 9409.1 μg/g pectin Ci Hg=1372.7 μg/g pectin and Ci Cd=1064.5 μg/g pectin. In the case of pellets, 100% initial Hg, Cd and Pb present initially in solution were adsorbed, Ci Pb being=103.5 μg/g, Ci Hg=15 μg/g and Ci Cd=12 μg/g. Molecular mechanics (MM2) and PM3 calculations were done, trying to identify evidence of the proposed kinetic model and an explanation of the equilibrium uptake of the metal adsorption on chitosan-pectin pellets.
Fil: Debbaudt, Adriana Laura. Universidad Nacional del Sur. Departamento de Química; Argentina
Fil: Ferreira, María Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Nacional del Sur. Departamento de Química; Argentina
Fil: Gschaider, María Elena. Universidad Nacional del Sur. Departamento de Química; Argentina
description Chitosan, pectin and chitosan-pectin pellets were studied as adsorbents for Cd2+ from acidic aqueous solutions at selected conditions. Several adsorption sites were considered and adsorption mechanisms for the biopolymers-metal interactions are proposed taking into account theoretical and experimental results. Langmuir adsorption isotherms for Hg, Pb and Cd on pellets gave KL values of 796, 1551 and 7265Lmequiv.-1; their Memax (mequiv./g) being 0.027 (2.71 mg/g), 0.1075 (11.2 mg/g) and 0.022 (1.23 mg/g), respectively. Chitosan adsorption of Hg achieved 85-100% and 70-75% for Pb and Cd, respectively. Ci (initial concentration) was 47,045.4 μg/g chitosan for Pb, 6863.6 μg/g chitosan for Hg and 5.4436 μg/g chitosan for Cd. When pectin was the adsorbent 15% of Hg and not more than 4% Pb and Cd were adsorbed, Ci Pb being 9409.1 μg/g pectin Ci Hg=1372.7 μg/g pectin and Ci Cd=1064.5 μg/g pectin. In the case of pellets, 100% initial Hg, Cd and Pb present initially in solution were adsorbed, Ci Pb being=103.5 μg/g, Ci Hg=15 μg/g and Ci Cd=12 μg/g. Molecular mechanics (MM2) and PM3 calculations were done, trying to identify evidence of the proposed kinetic model and an explanation of the equilibrium uptake of the metal adsorption on chitosan-pectin pellets.
publishDate 2004
dc.date.none.fl_str_mv 2004-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/126998
Debbaudt, Adriana Laura; Ferreira, María Luján; Gschaider, María Elena; Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd; Elsevier; Carbohydrate Polymers; 56; 3; 7-2004; 321-332
0144-8617
CONICET Digital
CONICET
url http://hdl.handle.net/11336/126998
identifier_str_mv Debbaudt, Adriana Laura; Ferreira, María Luján; Gschaider, María Elena; Theoretical and experimental study of M2+ adsorption on biopolymers: III. Comparative kinetic pattern of Pb, Hg and Cd; Elsevier; Carbohydrate Polymers; 56; 3; 7-2004; 321-332
0144-8617
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0144861704000645#!
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.carbpol.2004.02.009
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.22299

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