Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes
Autor(a) principal: | |
---|---|
Data de Publicação: | 2001 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392001000300009 |
Resumo: | The development of simple methods for removal of heavy metals from aqueous samples is a relevant field of research. In this connection, the electrodeposition of the Cd+2 ion, one of the most toxic species for animals and human beings, was investigated in aerated pH 4.8 sulfuric-sulfate solutions. In potentiostatic conditions, the maximum rate of cadmium deposition at a neutral polypyrrole (PPy0) coated reticulated vitreous carbon (RVC) working electrode occurs at -3.0 V vs. the saturated calomel reference electrode (SCE). Moreover, the conversion rate depends both on the applied potential and on the mass transport regime, and, for solutions containing 10 mg L-1 of Cd2+, the highest removal efficiency achieved is 84% after 90 min of electrolysis. The concentration decay of the Cd+2 ion in the solution was monitored by anodic stripping voltammetry (ASV) at a hanging mercury drop electrode. Besides, metallic cadmium deposited onto the polypyrrole modified RVC electrode was evidenced by Scanning Electron Microscopy (SEM) analysis using the backscattered electron image (BEI) technique and by Energy Dispersive Spectrometry (EDS). |
id |
ABMABCABPOL-1_b0a9d560d4ea9baa1f9d8a439921c6f3 |
---|---|
oai_identifier_str |
oai:scielo:S1516-14392001000300009 |
network_acronym_str |
ABMABCABPOL-1 |
network_name_str |
Materials research (São Carlos. Online) |
repository_id_str |
|
spelling |
Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodescadmiumRVCpolypyrrolemicroscopyThe development of simple methods for removal of heavy metals from aqueous samples is a relevant field of research. In this connection, the electrodeposition of the Cd+2 ion, one of the most toxic species for animals and human beings, was investigated in aerated pH 4.8 sulfuric-sulfate solutions. In potentiostatic conditions, the maximum rate of cadmium deposition at a neutral polypyrrole (PPy0) coated reticulated vitreous carbon (RVC) working electrode occurs at -3.0 V vs. the saturated calomel reference electrode (SCE). Moreover, the conversion rate depends both on the applied potential and on the mass transport regime, and, for solutions containing 10 mg L-1 of Cd2+, the highest removal efficiency achieved is 84% after 90 min of electrolysis. The concentration decay of the Cd+2 ion in the solution was monitored by anodic stripping voltammetry (ASV) at a hanging mercury drop electrode. Besides, metallic cadmium deposited onto the polypyrrole modified RVC electrode was evidenced by Scanning Electron Microscopy (SEM) analysis using the backscattered electron image (BEI) technique and by Energy Dispersive Spectrometry (EDS).ABM, ABC, ABPol2001-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392001000300009Materials Research v.4 n.3 2001reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392001000300009info:eu-repo/semantics/openAccessTramontina,JucelâniaMachado,GiovannaAzambuja,Denise S.Piatnicki,Clarisse M.S.Samios,Dimitrioseng2001-08-23T00:00:00Zoai:scielo:S1516-14392001000300009Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2001-08-23T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes |
title |
Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes |
spellingShingle |
Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes Tramontina,Jucelânia cadmium RVC polypyrrole microscopy |
title_short |
Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes |
title_full |
Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes |
title_fullStr |
Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes |
title_full_unstemmed |
Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes |
title_sort |
Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes |
author |
Tramontina,Jucelânia |
author_facet |
Tramontina,Jucelânia Machado,Giovanna Azambuja,Denise S. Piatnicki,Clarisse M.S. Samios,Dimitrios |
author_role |
author |
author2 |
Machado,Giovanna Azambuja,Denise S. Piatnicki,Clarisse M.S. Samios,Dimitrios |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Tramontina,Jucelânia Machado,Giovanna Azambuja,Denise S. Piatnicki,Clarisse M.S. Samios,Dimitrios |
dc.subject.por.fl_str_mv |
cadmium RVC polypyrrole microscopy |
topic |
cadmium RVC polypyrrole microscopy |
description |
The development of simple methods for removal of heavy metals from aqueous samples is a relevant field of research. In this connection, the electrodeposition of the Cd+2 ion, one of the most toxic species for animals and human beings, was investigated in aerated pH 4.8 sulfuric-sulfate solutions. In potentiostatic conditions, the maximum rate of cadmium deposition at a neutral polypyrrole (PPy0) coated reticulated vitreous carbon (RVC) working electrode occurs at -3.0 V vs. the saturated calomel reference electrode (SCE). Moreover, the conversion rate depends both on the applied potential and on the mass transport regime, and, for solutions containing 10 mg L-1 of Cd2+, the highest removal efficiency achieved is 84% after 90 min of electrolysis. The concentration decay of the Cd+2 ion in the solution was monitored by anodic stripping voltammetry (ASV) at a hanging mercury drop electrode. Besides, metallic cadmium deposited onto the polypyrrole modified RVC electrode was evidenced by Scanning Electron Microscopy (SEM) analysis using the backscattered electron image (BEI) technique and by Energy Dispersive Spectrometry (EDS). |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-07-01 |
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=S1516-14392001000300009 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392001000300009 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392001000300009 |
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 |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.4 n.3 2001 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212656898637824 |