Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: Effect of temperature, pH and water hardness

Detalhes bibliográficos
Autor(a) principal: Martins, Ramiro
Data de Publicação: 2004
Outros Autores: Pardo, Rosana, Boaventura, Rui
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10198/2001
Resumo: The biosorption of cadmium(II) and zinc(II) ions onto dried Fontinalis antipyretica, a widely spread aquatic moss, was studied under different values of temperature, initial pH and water hardness. The equilibrium was well described by Langmuir adsorption isotherms. Maximum biosorption capacity of cadmium was independent on temperature and averaged 28.0mg g 1 moss, whereas for zinc, capacity increased with temperature, from 11.5mg g 1 moss at 5 C to 14.7mg g 1 moss at 30 C. Optimum adsorption pH value was determined as 5.0 for both metal ions. Cadmium uptake was unaffected by the presence of calcium ions, but zinc sorption was improved when water hardness increased from 101.1 to 116.3mg CaCO3 l 1. Inversely, as hardness increases, the competition with calcium ions strongly reduces the affinity of the biosorbent for zinc.
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spelling Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: Effect of temperature, pH and water hardnessAquatic mossZincCadmiumSorptionHeavy metalsFontinalis antipyreticaThe biosorption of cadmium(II) and zinc(II) ions onto dried Fontinalis antipyretica, a widely spread aquatic moss, was studied under different values of temperature, initial pH and water hardness. The equilibrium was well described by Langmuir adsorption isotherms. Maximum biosorption capacity of cadmium was independent on temperature and averaged 28.0mg g 1 moss, whereas for zinc, capacity increased with temperature, from 11.5mg g 1 moss at 5 C to 14.7mg g 1 moss at 30 C. Optimum adsorption pH value was determined as 5.0 for both metal ions. Cadmium uptake was unaffected by the presence of calcium ions, but zinc sorption was improved when water hardness increased from 101.1 to 116.3mg CaCO3 l 1. Inversely, as hardness increases, the competition with calcium ions strongly reduces the affinity of the biosorbent for zinc.The authors thank the Portuguese Foundation for Science and Technology (FCT) for the financial support under the research project POCTI/C/EQU/12139/98.ElsevierBiblioteca Digital do IPBMartins, RamiroPardo, RosanaBoaventura, Rui2010-02-18T16:20:11Z20042004-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/2001engMartins, Ramiro; Pardo, Rosana; Boaventura, Rui (2004). Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: effect of temperature, pH and wat:er hardness. Water Research. ISSN 0043-1354. 38:3, p. 693-6990043-135410.1016/j.watres.2003.10.013info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-21T10:04:58Zoai:bibliotecadigital.ipb.pt:10198/2001Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:54:52.823999Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: Effect of temperature, pH and water hardness
title Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: Effect of temperature, pH and water hardness
spellingShingle Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: Effect of temperature, pH and water hardness
Martins, Ramiro
Aquatic moss
Zinc
Cadmium
Sorption
Heavy metals
Fontinalis antipyretica
title_short Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: Effect of temperature, pH and water hardness
title_full Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: Effect of temperature, pH and water hardness
title_fullStr Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: Effect of temperature, pH and water hardness
title_full_unstemmed Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: Effect of temperature, pH and water hardness
title_sort Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: Effect of temperature, pH and water hardness
author Martins, Ramiro
author_facet Martins, Ramiro
Pardo, Rosana
Boaventura, Rui
author_role author
author2 Pardo, Rosana
Boaventura, Rui
author2_role author
author
dc.contributor.none.fl_str_mv Biblioteca Digital do IPB
dc.contributor.author.fl_str_mv Martins, Ramiro
Pardo, Rosana
Boaventura, Rui
dc.subject.por.fl_str_mv Aquatic moss
Zinc
Cadmium
Sorption
Heavy metals
Fontinalis antipyretica
topic Aquatic moss
Zinc
Cadmium
Sorption
Heavy metals
Fontinalis antipyretica
description The biosorption of cadmium(II) and zinc(II) ions onto dried Fontinalis antipyretica, a widely spread aquatic moss, was studied under different values of temperature, initial pH and water hardness. The equilibrium was well described by Langmuir adsorption isotherms. Maximum biosorption capacity of cadmium was independent on temperature and averaged 28.0mg g 1 moss, whereas for zinc, capacity increased with temperature, from 11.5mg g 1 moss at 5 C to 14.7mg g 1 moss at 30 C. Optimum adsorption pH value was determined as 5.0 for both metal ions. Cadmium uptake was unaffected by the presence of calcium ions, but zinc sorption was improved when water hardness increased from 101.1 to 116.3mg CaCO3 l 1. Inversely, as hardness increases, the competition with calcium ions strongly reduces the affinity of the biosorbent for zinc.
publishDate 2004
dc.date.none.fl_str_mv 2004
2004-01-01T00:00:00Z
2010-02-18T16:20:11Z
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://hdl.handle.net/10198/2001
url http://hdl.handle.net/10198/2001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Martins, Ramiro; Pardo, Rosana; Boaventura, Rui (2004). Cadmium(II) and zinc(II) adsorption by the aquatic moss Fontinalis antipyretica: effect of temperature, pH and wat:er hardness. Water Research. ISSN 0043-1354. 38:3, p. 693-699
0043-1354
10.1016/j.watres.2003.10.013
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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