Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/37456 |
Resumo: | In the present work, a new material, SiO2 /Al2 O3 /Nb2 O5 (designated as SiAlNb), was evaluated as an adsorbent in a flow injection spectrophotometric method for online preconcentration and determination of trace amounts of Zn2+ ions. The preconcentration method is based on Zn2+ adsorption onto the surface of SiAlNb in alkaline medium (pH 9.0). The elution step is carried out using HNO3 solution, followed by reaction of the Zn2+ ions with 1-(2-piridylazo)-2-naphtol (pan) in ammoniacal buffer solution (pH 9.3) containing Tween-80. The [Zn(pan)2 ] complex formed is determined at 560 nm. The method presented a linear range between 7.6 and 180.0 µg L-1 (r = 0.9992) and limits of detection and quantification of 2.3 and 7.6 µg L-1, respectively. According to the Langmuir linear model, the maximum adsorption capacity was found to be 7.0 mg of Zn2+ g-1 of SiAlNb. The proposed method was successfully applied to the Zn2+ determination in water samples (lake, mineral, tap) and certified reference material (TORT-2 Lobster Hepatopancreas). |
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Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ionsAdsorbent preconcentration systemZinc ionsSilica-alumina-niobiaSol-gel processIn the present work, a new material, SiO2 /Al2 O3 /Nb2 O5 (designated as SiAlNb), was evaluated as an adsorbent in a flow injection spectrophotometric method for online preconcentration and determination of trace amounts of Zn2+ ions. The preconcentration method is based on Zn2+ adsorption onto the surface of SiAlNb in alkaline medium (pH 9.0). The elution step is carried out using HNO3 solution, followed by reaction of the Zn2+ ions with 1-(2-piridylazo)-2-naphtol (pan) in ammoniacal buffer solution (pH 9.3) containing Tween-80. The [Zn(pan)2 ] complex formed is determined at 560 nm. The method presented a linear range between 7.6 and 180.0 µg L-1 (r = 0.9992) and limits of detection and quantification of 2.3 and 7.6 µg L-1, respectively. According to the Langmuir linear model, the maximum adsorption capacity was found to be 7.0 mg of Zn2+ g-1 of SiAlNb. The proposed method was successfully applied to the Zn2+ determination in water samples (lake, mineral, tap) and certified reference material (TORT-2 Lobster Hepatopancreas).No presente trabalho foi avaliado um novo material como adsorvente, SiO2 /Al2 O3 /Nb2 O5 (designado SiAlNb), empregado na determinação e pré-concentração online de Zn2+ por um método espectrofotométrico por injeção em fluxo. O método de pré-concentração é baseado na adsorção de Zn2+ em meio alcalino (pH 9,0) sobre a superfície de SiAlNb. A etapa de eluição é realizada usando solução de HNO3 e é seguida da reação dos íons Zn2+ com 1-(2-piridilazo)-2-naftol (pan) na presença de Tween-80 em solução amoniacal (pH 9,3). O complexo formado, [Zn(pan)2 ], é posteriormente determinado a 560 nm. O método apresentou faixa linear entre 7,6 e 180,0 µg L-1 (r = 0,9992) e limites de detecção e quantificação de 2,3 e 7,6 µg L-1, respectivamente. De acordo com o modelo linear de Langmuir, a capacidade máxima de adsorção foi de 7,0 mg de Zn2+ por grama de SiAlNb. O método proposto foi aplicado com sucesso na determinação de Zn2+ em amostras de água (lago, mineral e torneira) e material certificado de referência (TORT-2 Lobster Hepatopancreas).Sociedade Brasileira de Química2019-10-31T17:00:14Z2019-10-31T17:00:14Z2010info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfTARLEY, C. R. T. et al. Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions. Journal of the Brazilian Chemical Society, [S.l.], v. 21, n. 6, p. 1106-1116, 2010.http://repositorio.ufla.br/jspui/handle/1/37456Journal of the Brazilian Chemical Societyreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessTarley, César Ricardo T.Ávila, Thiago C. deSegatelli, Mariana G.Lima, Giovana de F.Peregrino, Gabrielly dos S.Scheeren, Carla W.Dias, Silvio Luís P.Ribeiro, Emerson S.eng2019-10-31T17:00:46Zoai:localhost:1/37456Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2019-10-31T17:00:46Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions |
title |
Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions |
spellingShingle |
Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions Tarley, César Ricardo T. Adsorbent preconcentration system Zinc ions Silica-alumina-niobia Sol-gel process |
title_short |
Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions |
title_full |
Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions |
title_fullStr |
Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions |
title_full_unstemmed |
Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions |
title_sort |
Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions |
author |
Tarley, César Ricardo T. |
author_facet |
Tarley, César Ricardo T. Ávila, Thiago C. de Segatelli, Mariana G. Lima, Giovana de F. Peregrino, Gabrielly dos S. Scheeren, Carla W. Dias, Silvio Luís P. Ribeiro, Emerson S. |
author_role |
author |
author2 |
Ávila, Thiago C. de Segatelli, Mariana G. Lima, Giovana de F. Peregrino, Gabrielly dos S. Scheeren, Carla W. Dias, Silvio Luís P. Ribeiro, Emerson S. |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Tarley, César Ricardo T. Ávila, Thiago C. de Segatelli, Mariana G. Lima, Giovana de F. Peregrino, Gabrielly dos S. Scheeren, Carla W. Dias, Silvio Luís P. Ribeiro, Emerson S. |
dc.subject.por.fl_str_mv |
Adsorbent preconcentration system Zinc ions Silica-alumina-niobia Sol-gel process |
topic |
Adsorbent preconcentration system Zinc ions Silica-alumina-niobia Sol-gel process |
description |
In the present work, a new material, SiO2 /Al2 O3 /Nb2 O5 (designated as SiAlNb), was evaluated as an adsorbent in a flow injection spectrophotometric method for online preconcentration and determination of trace amounts of Zn2+ ions. The preconcentration method is based on Zn2+ adsorption onto the surface of SiAlNb in alkaline medium (pH 9.0). The elution step is carried out using HNO3 solution, followed by reaction of the Zn2+ ions with 1-(2-piridylazo)-2-naphtol (pan) in ammoniacal buffer solution (pH 9.3) containing Tween-80. The [Zn(pan)2 ] complex formed is determined at 560 nm. The method presented a linear range between 7.6 and 180.0 µg L-1 (r = 0.9992) and limits of detection and quantification of 2.3 and 7.6 µg L-1, respectively. According to the Langmuir linear model, the maximum adsorption capacity was found to be 7.0 mg of Zn2+ g-1 of SiAlNb. The proposed method was successfully applied to the Zn2+ determination in water samples (lake, mineral, tap) and certified reference material (TORT-2 Lobster Hepatopancreas). |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010 2019-10-31T17:00:14Z 2019-10-31T17:00:14Z |
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 |
TARLEY, C. R. T. et al. Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions. Journal of the Brazilian Chemical Society, [S.l.], v. 21, n. 6, p. 1106-1116, 2010. http://repositorio.ufla.br/jspui/handle/1/37456 |
identifier_str_mv |
TARLEY, C. R. T. et al. Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions. Journal of the Brazilian Chemical Society, [S.l.], v. 21, n. 6, p. 1106-1116, 2010. |
url |
http://repositorio.ufla.br/jspui/handle/1/37456 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial 4.0 International http://creativecommons.org/licenses/by-nc/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial 4.0 International http://creativecommons.org/licenses/by-nc/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
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1807835184190455808 |