Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/24473 |
Resumo: | We performed a laboratorial test with the aim of evaluating the effect of the application of nanotechnology in the decontamination of soils and alluvium with high levels of metals (Zn, Cu, Cr, Co, Cd, Pb, Ni ) and As. An injection of a suspension of nanoparticles of zero-valent iron (nZVI) with 3 different concentrations (1 g/L, 3g/L and 7g/L), was used. For most of the elements the retention by nZVI was proportional to the concentration of the injected suspensions and the evolution was similar.The metals were immobilized by adsorption on the surface layer of iron oxides covering the nZVI and/or by mechanisms of complexation (co)-precipitation and chemical reduction. After 60 days of injection, the nZVIs lost their reactivity, and the retained species were desorbed and passed back to the soluble phase, a situation which was observed after 120 days. The evaluation of the effectiveness of the nanoparticles in these contaminated materials was positive, although the lost of reactivity 60 days after the injection. The low permeability of most materials makes difficult the injection and diffusion of nZVI, so a more efficient technique will be the use of macroparticles of zero-valent iron, more stable and as filling of reactive barriers. |
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Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminadoscontaminaçãoferro zero valentemetais pesadosnanopartículasremediaçãoWe performed a laboratorial test with the aim of evaluating the effect of the application of nanotechnology in the decontamination of soils and alluvium with high levels of metals (Zn, Cu, Cr, Co, Cd, Pb, Ni ) and As. An injection of a suspension of nanoparticles of zero-valent iron (nZVI) with 3 different concentrations (1 g/L, 3g/L and 7g/L), was used. For most of the elements the retention by nZVI was proportional to the concentration of the injected suspensions and the evolution was similar.The metals were immobilized by adsorption on the surface layer of iron oxides covering the nZVI and/or by mechanisms of complexation (co)-precipitation and chemical reduction. After 60 days of injection, the nZVIs lost their reactivity, and the retained species were desorbed and passed back to the soluble phase, a situation which was observed after 120 days. The evaluation of the effectiveness of the nanoparticles in these contaminated materials was positive, although the lost of reactivity 60 days after the injection. The low permeability of most materials makes difficult the injection and diffusion of nZVI, so a more efficient technique will be the use of macroparticles of zero-valent iron, more stable and as filling of reactive barriers.XIV Congresso de Geoquímica dos Países de Língua Portuguesa2019-02-06T12:41:49Z2019-02-062018-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/24473http://hdl.handle.net/10174/24473porFonseca, R.; Pinho, C.; Janeiro, A. I.; Araújo, A. (2018). Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados. XIV Congresso de Geoquímica dos Países de Língua Portuguesa, XIX Semana de Geoquímica. Programa e ResumosGEOrfonseca@uevora.ptndndaaraujo@uevora.ptnd396Fonseca, RitaPinho, CatarinaJaneiro, Ana IsabelAraújo, AntónioAraújo, Antónioinfo: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:RCAAP2024-01-03T19:17:33Zoai:dspace.uevora.pt:10174/24473Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:15:09.342966Repositório 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 |
Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados |
title |
Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados |
spellingShingle |
Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados Fonseca, Rita contaminação ferro zero valente metais pesados nanopartículas remediação |
title_short |
Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados |
title_full |
Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados |
title_fullStr |
Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados |
title_full_unstemmed |
Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados |
title_sort |
Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados |
author |
Fonseca, Rita |
author_facet |
Fonseca, Rita Pinho, Catarina Janeiro, Ana Isabel Araújo, António |
author_role |
author |
author2 |
Pinho, Catarina Janeiro, Ana Isabel Araújo, António |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Fonseca, Rita Pinho, Catarina Janeiro, Ana Isabel Araújo, António Araújo, António |
dc.subject.por.fl_str_mv |
contaminação ferro zero valente metais pesados nanopartículas remediação |
topic |
contaminação ferro zero valente metais pesados nanopartículas remediação |
description |
We performed a laboratorial test with the aim of evaluating the effect of the application of nanotechnology in the decontamination of soils and alluvium with high levels of metals (Zn, Cu, Cr, Co, Cd, Pb, Ni ) and As. An injection of a suspension of nanoparticles of zero-valent iron (nZVI) with 3 different concentrations (1 g/L, 3g/L and 7g/L), was used. For most of the elements the retention by nZVI was proportional to the concentration of the injected suspensions and the evolution was similar.The metals were immobilized by adsorption on the surface layer of iron oxides covering the nZVI and/or by mechanisms of complexation (co)-precipitation and chemical reduction. After 60 days of injection, the nZVIs lost their reactivity, and the retained species were desorbed and passed back to the soluble phase, a situation which was observed after 120 days. The evaluation of the effectiveness of the nanoparticles in these contaminated materials was positive, although the lost of reactivity 60 days after the injection. The low permeability of most materials makes difficult the injection and diffusion of nZVI, so a more efficient technique will be the use of macroparticles of zero-valent iron, more stable and as filling of reactive barriers. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01T00:00:00Z 2019-02-06T12:41:49Z 2019-02-06 |
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/10174/24473 http://hdl.handle.net/10174/24473 |
url |
http://hdl.handle.net/10174/24473 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Fonseca, R.; Pinho, C.; Janeiro, A. I.; Araújo, A. (2018). Aplicação de nanotecnologia na remediação ambiental: Uso de nanopartículas de ferro zero valente (NZVI) em materiais contaminados. XIV Congresso de Geoquímica dos Países de Língua Portuguesa, XIX Semana de Geoquímica. Programa e Resumos GEO rfonseca@uevora.pt nd nd aaraujo@uevora.pt nd 396 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
XIV Congresso de Geoquímica dos Países de Língua Portuguesa |
publisher.none.fl_str_mv |
XIV Congresso de Geoquímica dos Países de Língua Portuguesa |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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