Nanoscale zero-valent iron-assisted soil washing for the removal of potentially toxic elements

[EN] The present study focuses on soil washing enhancement via soil pretreatment with nanoscale zero-valent iron (nZVI) for the remediation of potentially toxic elements. To this end, soil polluted with As, Cu, Hg, Pb and Sb was partitioned into various grain sizes (500–2000, 125–500 and <125 μm)...

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Detalhes bibliográficos
Autores: Boente López, Carlos, Sierra Fernández, Carlos, Martínez Blanco, David, Menéndez Aguado, Juan María, Rodríguez Gallego, José Luis
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Recursos:Universidad de León
Repositorio:BULERIA. Repositorio Institucional de la Universidad de León
OAI Identifier:oai:buleria.unileon.es:10612/26169
Acesso em linha:https://hdl.handle.net/10612/26169
Access Level:acceso abierto
Palavra-chave:Ecología. Medio ambiente
Nanoscale zero-valent iron
PTEs
Soil Remediation
Soil Washing
2511.06 Conservación de Suelos
2511.04 Química de Suelos
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repository_id_str
spelling Nanoscale zero-valent iron-assisted soil washing for the removal of potentially toxic elementsBoente López, CarlosSierra Fernández, CarlosMartínez Blanco, DavidMenéndez Aguado, Juan MaríaRodríguez Gallego, José LuisEcología. Medio ambienteNanoscale zero-valent ironPTEsSoil RemediationSoil Washing2511.06 Conservación de Suelos2511.04 Química de Suelos[EN] The present study focuses on soil washing enhancement via soil pretreatment with nanoscale zero-valent iron (nZVI) for the remediation of potentially toxic elements. To this end, soil polluted with As, Cu, Hg, Pb and Sb was partitioned into various grain sizes (500–2000, 125–500 and <125 μm). The fractions were pretreated with nZVI and subsequently subjected, according to grain size, to Wet-High Intensity Magnetic Separation (WHIMS) or hydrocycloning. The results were compared with those obtained in the absence of nanoparticles. An exhaustive characterization of the magnetic signal of the nanoparticles was done. This provided valuable information regarding potentially toxic elements (PTEs) fate, and allowed a metallurgical accounting correction considering the dilution effects caused by nanoparticle addition. As a result, remarkable recovery yields were obtained for Cu, Pb and Sb, which concentrated with the nZVI in the magnetically separated fraction (WHIMS tests) and underflow (hydrocyclone tests). In contrast, Hg, concentrated in the non-magnetic fraction and overflow respectively, while the behavior of As was unaltered by the nZVI pretreatment. All things considered, the addition of nZVI enhanced the efficiency of soil washing, particularly for larger fractions (125–2000 μm). The proposed methodology lays the foundations for nanoparticle utilization in soil washing operations.SIThis work was supported by Project CTM2016-75894-P (MINECO) . Carlos Boente obtained a grant from the “Formación del Profesorado Universitario” program , financed by the “Ministerio de Educación, Cultura y Deporte de España” . The authors thank the “Servicio Cientifico-Técnico de Medidas Magnéticas” of the University of Oviedo.ElsevierExplotacion de MinasEscuela Superior y Tecnica de Ingenieros de Minas2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttps://hdl.handle.net/10612/26169reponame:BULERIA. Repositorio Institucional de la Universidad de Leóninstname:Universidad de LeónIngléshttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:buleria.unileon.es:10612/261692026-06-24T12:43:27Z
dc.title.none.fl_str_mv Nanoscale zero-valent iron-assisted soil washing for the removal of potentially toxic elements
title Nanoscale zero-valent iron-assisted soil washing for the removal of potentially toxic elements
spellingShingle Nanoscale zero-valent iron-assisted soil washing for the removal of potentially toxic elements
Boente López, Carlos
Ecología. Medio ambiente
Nanoscale zero-valent iron
PTEs
Soil Remediation
Soil Washing
2511.06 Conservación de Suelos
2511.04 Química de Suelos
title_short Nanoscale zero-valent iron-assisted soil washing for the removal of potentially toxic elements
title_full Nanoscale zero-valent iron-assisted soil washing for the removal of potentially toxic elements
title_fullStr Nanoscale zero-valent iron-assisted soil washing for the removal of potentially toxic elements
title_full_unstemmed Nanoscale zero-valent iron-assisted soil washing for the removal of potentially toxic elements
title_sort Nanoscale zero-valent iron-assisted soil washing for the removal of potentially toxic elements
dc.creator.none.fl_str_mv Boente López, Carlos
Sierra Fernández, Carlos
Martínez Blanco, David
Menéndez Aguado, Juan María
Rodríguez Gallego, José Luis
author Boente López, Carlos
author_facet Boente López, Carlos
Sierra Fernández, Carlos
Martínez Blanco, David
Menéndez Aguado, Juan María
Rodríguez Gallego, José Luis
author_role author
author2 Sierra Fernández, Carlos
Martínez Blanco, David
Menéndez Aguado, Juan María
Rodríguez Gallego, José Luis
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Explotacion de Minas
Escuela Superior y Tecnica de Ingenieros de Minas
dc.subject.none.fl_str_mv Ecología. Medio ambiente
Nanoscale zero-valent iron
PTEs
Soil Remediation
Soil Washing
2511.06 Conservación de Suelos
2511.04 Química de Suelos
topic Ecología. Medio ambiente
Nanoscale zero-valent iron
PTEs
Soil Remediation
Soil Washing
2511.06 Conservación de Suelos
2511.04 Química de Suelos
description [EN] The present study focuses on soil washing enhancement via soil pretreatment with nanoscale zero-valent iron (nZVI) for the remediation of potentially toxic elements. To this end, soil polluted with As, Cu, Hg, Pb and Sb was partitioned into various grain sizes (500–2000, 125–500 and <125 μm). The fractions were pretreated with nZVI and subsequently subjected, according to grain size, to Wet-High Intensity Magnetic Separation (WHIMS) or hydrocycloning. The results were compared with those obtained in the absence of nanoparticles. An exhaustive characterization of the magnetic signal of the nanoparticles was done. This provided valuable information regarding potentially toxic elements (PTEs) fate, and allowed a metallurgical accounting correction considering the dilution effects caused by nanoparticle addition. As a result, remarkable recovery yields were obtained for Cu, Pb and Sb, which concentrated with the nZVI in the magnetically separated fraction (WHIMS tests) and underflow (hydrocyclone tests). In contrast, Hg, concentrated in the non-magnetic fraction and overflow respectively, while the behavior of As was unaltered by the nZVI pretreatment. All things considered, the addition of nZVI enhanced the efficiency of soil washing, particularly for larger fractions (125–2000 μm). The proposed methodology lays the foundations for nanoparticle utilization in soil washing operations.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/10612/26169
url https://hdl.handle.net/10612/26169
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:BULERIA. Repositorio Institucional de la Universidad de León
instname:Universidad de León
instname_str Universidad de León
reponame_str BULERIA. Repositorio Institucional de la Universidad de León
collection BULERIA. Repositorio Institucional de la Universidad de León
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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