Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides

Autores
Peligro, Francisco R.; Pavlovic, Ivana; Rojas Delgado, Ricardo; Barriga, Cristobalina
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Heavy metal removal from wastewater is an important environmental issue. Sorption by layered double hydroxides (LDHs) and precipitation in alkaline media are two of the main remediation techniques for these pollutants. Here, both processes are compared, with emphasis on the mechanisms involved and the solids obtained as residues. A heavy metal ion solution with high sulfate concentration was used as a simulated wastewater. It was treated with a carbonate-containing Mg-Al LDH to study sorption processes, while alkalization in the presence of Mg2+ ions was used to produce LDH in situ precipitation. The removal capacity of these processes was analyzed and the solids obtained upon remediation were characterized by PXRD patterns and FT-IR spectra. The obtained results were related to the removal mechanisms, the solubility products of heavy metal hydroxides and their capacity to produce LDH phases. High Cu2+ removal capacities were obtained in all cases, while those of Pb2+ and Zn2+ ions depended on the remediation procedure and factors such as Mg2+ ions concentration and final pH. Apart from Pb2+ ions, the heavy metal precipitated as LDH phases, which presented higher stability than simple heavy metal hydroxides and prevented Zn2+ mobilization in basic media.
Fil: Peligro, Francisco R.. Universidad de Córdoba; España
Fil: Pavlovic, Ivana. Universidad de Córdoba; España
Fil: Rojas Delgado, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Barriga, Cristobalina. Universidad de Córdoba; España
Materia
Heavy Metal
Layered Double Hydroxide
Mechanism
Precipitation
Sorption
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:11336/60997
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxidesPeligro, Francisco R.Pavlovic, IvanaRojas Delgado, RicardoBarriga, CristobalinaHeavy MetalLayered Double HydroxideMechanismPrecipitationSorptionhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Heavy metal removal from wastewater is an important environmental issue. Sorption by layered double hydroxides (LDHs) and precipitation in alkaline media are two of the main remediation techniques for these pollutants. Here, both processes are compared, with emphasis on the mechanisms involved and the solids obtained as residues. A heavy metal ion solution with high sulfate concentration was used as a simulated wastewater. It was treated with a carbonate-containing Mg-Al LDH to study sorption processes, while alkalization in the presence of Mg2+ ions was used to produce LDH in situ precipitation. The removal capacity of these processes was analyzed and the solids obtained upon remediation were characterized by PXRD patterns and FT-IR spectra. The obtained results were related to the removal mechanisms, the solubility products of heavy metal hydroxides and their capacity to produce LDH phases. High Cu2+ removal capacities were obtained in all cases, while those of Pb2+ and Zn2+ ions depended on the remediation procedure and factors such as Mg2+ ions concentration and final pH. Apart from Pb2+ ions, the heavy metal precipitated as LDH phases, which presented higher stability than simple heavy metal hydroxides and prevented Zn2+ mobilization in basic media.Fil: Peligro, Francisco R.. Universidad de Córdoba; EspañaFil: Pavlovic, Ivana. Universidad de Córdoba; EspañaFil: Rojas Delgado, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Barriga, Cristobalina. Universidad de Córdoba; EspañaElsevier Science Sa2016-12-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/60997Peligro, Francisco R.; Pavlovic, Ivana; Rojas Delgado, Ricardo; Barriga, Cristobalina; Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides; Elsevier Science Sa; Chemical Engineering Journal; 306; 10-12-2016; 1035-10401385-8947CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.cej.2016.08.054info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1385894716311275info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:04:19Zoai:ri.conicet.gov.ar:11336/60997instacron: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 15:04:19.64CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides
title Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides
spellingShingle Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides
Peligro, Francisco R.
Heavy Metal
Layered Double Hydroxide
Mechanism
Precipitation
Sorption
title_short Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides
title_full Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides
title_fullStr Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides
title_full_unstemmed Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides
title_sort Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides
dc.creator.none.fl_str_mv Peligro, Francisco R.
Pavlovic, Ivana
Rojas Delgado, Ricardo
Barriga, Cristobalina
author Peligro, Francisco R.
author_facet Peligro, Francisco R.
Pavlovic, Ivana
Rojas Delgado, Ricardo
Barriga, Cristobalina
author_role author
author2 Pavlovic, Ivana
Rojas Delgado, Ricardo
Barriga, Cristobalina
author2_role author
author
author
dc.subject.none.fl_str_mv Heavy Metal
Layered Double Hydroxide
Mechanism
Precipitation
Sorption
topic Heavy Metal
Layered Double Hydroxide
Mechanism
Precipitation
Sorption
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Heavy metal removal from wastewater is an important environmental issue. Sorption by layered double hydroxides (LDHs) and precipitation in alkaline media are two of the main remediation techniques for these pollutants. Here, both processes are compared, with emphasis on the mechanisms involved and the solids obtained as residues. A heavy metal ion solution with high sulfate concentration was used as a simulated wastewater. It was treated with a carbonate-containing Mg-Al LDH to study sorption processes, while alkalization in the presence of Mg2+ ions was used to produce LDH in situ precipitation. The removal capacity of these processes was analyzed and the solids obtained upon remediation were characterized by PXRD patterns and FT-IR spectra. The obtained results were related to the removal mechanisms, the solubility products of heavy metal hydroxides and their capacity to produce LDH phases. High Cu2+ removal capacities were obtained in all cases, while those of Pb2+ and Zn2+ ions depended on the remediation procedure and factors such as Mg2+ ions concentration and final pH. Apart from Pb2+ ions, the heavy metal precipitated as LDH phases, which presented higher stability than simple heavy metal hydroxides and prevented Zn2+ mobilization in basic media.
Fil: Peligro, Francisco R.. Universidad de Córdoba; España
Fil: Pavlovic, Ivana. Universidad de Córdoba; España
Fil: Rojas Delgado, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Barriga, Cristobalina. Universidad de Córdoba; España
description Heavy metal removal from wastewater is an important environmental issue. Sorption by layered double hydroxides (LDHs) and precipitation in alkaline media are two of the main remediation techniques for these pollutants. Here, both processes are compared, with emphasis on the mechanisms involved and the solids obtained as residues. A heavy metal ion solution with high sulfate concentration was used as a simulated wastewater. It was treated with a carbonate-containing Mg-Al LDH to study sorption processes, while alkalization in the presence of Mg2+ ions was used to produce LDH in situ precipitation. The removal capacity of these processes was analyzed and the solids obtained upon remediation were characterized by PXRD patterns and FT-IR spectra. The obtained results were related to the removal mechanisms, the solubility products of heavy metal hydroxides and their capacity to produce LDH phases. High Cu2+ removal capacities were obtained in all cases, while those of Pb2+ and Zn2+ ions depended on the remediation procedure and factors such as Mg2+ ions concentration and final pH. Apart from Pb2+ ions, the heavy metal precipitated as LDH phases, which presented higher stability than simple heavy metal hydroxides and prevented Zn2+ mobilization in basic media.
publishDate 2016
dc.date.none.fl_str_mv 2016-12-10
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/11336/60997
Peligro, Francisco R.; Pavlovic, Ivana; Rojas Delgado, Ricardo; Barriga, Cristobalina; Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides; Elsevier Science Sa; Chemical Engineering Journal; 306; 10-12-2016; 1035-1040
1385-8947
CONICET Digital
CONICET
url http://hdl.handle.net/11336/60997
identifier_str_mv Peligro, Francisco R.; Pavlovic, Ivana; Rojas Delgado, Ricardo; Barriga, Cristobalina; Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides; Elsevier Science Sa; Chemical Engineering Journal; 306; 10-12-2016; 1035-1040
1385-8947
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cej.2016.08.054
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1385894716311275
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 Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
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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