Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532015000901887 |
Resumo: | Composites based on nanosized particles of magnetite and natural microsized zeolite were prepared and their efficiency to adsorb arsenate from aqueous systems was evaluated through kinetic data and adsorption isotherms, considering the proportion of magnetic iron oxide, composite:solution ratio and zeolite particle size. A well-crystallized nanomagnetite with an averaged particle size of 50 nm when supported on zeolite was obtained; the nanomagnetite enhances the arsenate adsorption of zeolite. The composite prepared with a nanomagnetite:zeolite mass ratio of 0.43:1 and 0.30:1 presented on zeolite milled 20 and 120 min, respectively, showed a similar adsorption capacity as that observed for pure magnetite. Supported nanomagnetite prevents risks of the nanoparticles contamination. The smaller the mean particle size of zeolite the lower the mass proportion of nanomagnetite in the composite required to reach the maximum adsorptive efficiency. Acidic conditions improve arsenate remotion, in agreement with the development of positive surface charge in the composite. |
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Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systemscompositesmagnetic materialsnanostructuresMössbauer spectroscopysurface propertiesComposites based on nanosized particles of magnetite and natural microsized zeolite were prepared and their efficiency to adsorb arsenate from aqueous systems was evaluated through kinetic data and adsorption isotherms, considering the proportion of magnetic iron oxide, composite:solution ratio and zeolite particle size. A well-crystallized nanomagnetite with an averaged particle size of 50 nm when supported on zeolite was obtained; the nanomagnetite enhances the arsenate adsorption of zeolite. The composite prepared with a nanomagnetite:zeolite mass ratio of 0.43:1 and 0.30:1 presented on zeolite milled 20 and 120 min, respectively, showed a similar adsorption capacity as that observed for pure magnetite. Supported nanomagnetite prevents risks of the nanoparticles contamination. The smaller the mean particle size of zeolite the lower the mass proportion of nanomagnetite in the composite required to reach the maximum adsorptive efficiency. Acidic conditions improve arsenate remotion, in agreement with the development of positive surface charge in the composite.Sociedade Brasileira de Química2015-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532015000901887Journal of the Brazilian Chemical Society v.26 n.9 2015reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20150166info:eu-repo/semantics/openAccessPizarro,CarmenRubio,María A.Escudey,MauricioAlbornoz,María F.Muñoz,DanielaDenardin,JulianoFabris,José D.eng2015-09-11T00:00:00Zoai:scielo:S0103-50532015000901887Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2015-09-11T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems |
title |
Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems |
spellingShingle |
Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems Pizarro,Carmen composites magnetic materials nanostructures Mössbauer spectroscopy surface properties |
title_short |
Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems |
title_full |
Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems |
title_fullStr |
Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems |
title_full_unstemmed |
Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems |
title_sort |
Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems |
author |
Pizarro,Carmen |
author_facet |
Pizarro,Carmen Rubio,María A. Escudey,Mauricio Albornoz,María F. Muñoz,Daniela Denardin,Juliano Fabris,José D. |
author_role |
author |
author2 |
Rubio,María A. Escudey,Mauricio Albornoz,María F. Muñoz,Daniela Denardin,Juliano Fabris,José D. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Pizarro,Carmen Rubio,María A. Escudey,Mauricio Albornoz,María F. Muñoz,Daniela Denardin,Juliano Fabris,José D. |
dc.subject.por.fl_str_mv |
composites magnetic materials nanostructures Mössbauer spectroscopy surface properties |
topic |
composites magnetic materials nanostructures Mössbauer spectroscopy surface properties |
description |
Composites based on nanosized particles of magnetite and natural microsized zeolite were prepared and their efficiency to adsorb arsenate from aqueous systems was evaluated through kinetic data and adsorption isotherms, considering the proportion of magnetic iron oxide, composite:solution ratio and zeolite particle size. A well-crystallized nanomagnetite with an averaged particle size of 50 nm when supported on zeolite was obtained; the nanomagnetite enhances the arsenate adsorption of zeolite. The composite prepared with a nanomagnetite:zeolite mass ratio of 0.43:1 and 0.30:1 presented on zeolite milled 20 and 120 min, respectively, showed a similar adsorption capacity as that observed for pure magnetite. Supported nanomagnetite prevents risks of the nanoparticles contamination. The smaller the mean particle size of zeolite the lower the mass proportion of nanomagnetite in the composite required to reach the maximum adsorptive efficiency. Acidic conditions improve arsenate remotion, in agreement with the development of positive surface charge in the composite. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532015000901887 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532015000901887 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5935/0103-5053.20150166 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
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 v.26 n.9 2015 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318177488732160 |