Studies on indium sorption from iodide medium by polyurethane foam
Autor(a) principal: | |
---|---|
Data de Publicação: | 2004 |
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=S0103-50532004000400019 |
Resumo: | The sorption behavior of indium iodide onto polyether-based polyurethane (PUF) foam was investigated. The system shows rapid kinetics and maximum sorption from a meaningful range of either acidic or basic media and achieves distribution ratios above 10(4) L kg-1 ([KI] > 0.6 mol kg-1). Sorption equilibrium analysis indicates tetraiodo-indate (MInI4) as the main species sorbed on the foam matrix. A Langmuir isotherm was successfully fitted and values of (1.55±0.02) x 10-1 mol kg-1 and (7.0±1.3) x 10(4) L g-1 were obtained for the saturation capacity Ks and adsorption coefficient b, respectively. The temperature effect was evaluated and the thermodynamic parameters calculated. The values of the equilibrium constant, Kc, decreased with increasing temperature. The negative values of deltaG, deltaH and deltaS indicate a spontaneous and exothermic chemisorption process favored at low temperatures. |
id |
SBQ-2_fb227e73f5faff85cdcdf63013eaf573 |
---|---|
oai_identifier_str |
oai:scielo:S0103-50532004000400019 |
network_acronym_str |
SBQ-2 |
network_name_str |
Journal of the Brazilian Chemical Society (Online) |
repository_id_str |
|
spelling |
Studies on indium sorption from iodide medium by polyurethane foampolyurethane foamindiumsolid-phase extractionThe sorption behavior of indium iodide onto polyether-based polyurethane (PUF) foam was investigated. The system shows rapid kinetics and maximum sorption from a meaningful range of either acidic or basic media and achieves distribution ratios above 10(4) L kg-1 ([KI] > 0.6 mol kg-1). Sorption equilibrium analysis indicates tetraiodo-indate (MInI4) as the main species sorbed on the foam matrix. A Langmuir isotherm was successfully fitted and values of (1.55±0.02) x 10-1 mol kg-1 and (7.0±1.3) x 10(4) L g-1 were obtained for the saturation capacity Ks and adsorption coefficient b, respectively. The temperature effect was evaluated and the thermodynamic parameters calculated. The values of the equilibrium constant, Kc, decreased with increasing temperature. The negative values of deltaG, deltaH and deltaS indicate a spontaneous and exothermic chemisorption process favored at low temperatures.Sociedade Brasileira de Química2004-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000400019Journal of the Brazilian Chemical Society v.15 n.4 2004reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532004000400019info:eu-repo/semantics/openAccessFerreira,Elizabeth de M. M.Morelli,TadeuMoreira,Isabel M. N. S.Carvalho,Marcelo S. deeng2004-09-15T00:00:00Zoai:scielo:S0103-50532004000400019Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2004-09-15T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Studies on indium sorption from iodide medium by polyurethane foam |
title |
Studies on indium sorption from iodide medium by polyurethane foam |
spellingShingle |
Studies on indium sorption from iodide medium by polyurethane foam Ferreira,Elizabeth de M. M. polyurethane foam indium solid-phase extraction |
title_short |
Studies on indium sorption from iodide medium by polyurethane foam |
title_full |
Studies on indium sorption from iodide medium by polyurethane foam |
title_fullStr |
Studies on indium sorption from iodide medium by polyurethane foam |
title_full_unstemmed |
Studies on indium sorption from iodide medium by polyurethane foam |
title_sort |
Studies on indium sorption from iodide medium by polyurethane foam |
author |
Ferreira,Elizabeth de M. M. |
author_facet |
Ferreira,Elizabeth de M. M. Morelli,Tadeu Moreira,Isabel M. N. S. Carvalho,Marcelo S. de |
author_role |
author |
author2 |
Morelli,Tadeu Moreira,Isabel M. N. S. Carvalho,Marcelo S. de |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Ferreira,Elizabeth de M. M. Morelli,Tadeu Moreira,Isabel M. N. S. Carvalho,Marcelo S. de |
dc.subject.por.fl_str_mv |
polyurethane foam indium solid-phase extraction |
topic |
polyurethane foam indium solid-phase extraction |
description |
The sorption behavior of indium iodide onto polyether-based polyurethane (PUF) foam was investigated. The system shows rapid kinetics and maximum sorption from a meaningful range of either acidic or basic media and achieves distribution ratios above 10(4) L kg-1 ([KI] > 0.6 mol kg-1). Sorption equilibrium analysis indicates tetraiodo-indate (MInI4) as the main species sorbed on the foam matrix. A Langmuir isotherm was successfully fitted and values of (1.55±0.02) x 10-1 mol kg-1 and (7.0±1.3) x 10(4) L g-1 were obtained for the saturation capacity Ks and adsorption coefficient b, respectively. The temperature effect was evaluated and the thermodynamic parameters calculated. The values of the equilibrium constant, Kc, decreased with increasing temperature. The negative values of deltaG, deltaH and deltaS indicate a spontaneous and exothermic chemisorption process favored at low temperatures. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-08-01 |
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=S0103-50532004000400019 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000400019 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532004000400019 |
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.15 n.4 2004 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_ |
1750318165771943936 |