Galvanostatic removal of Pb2+ ions from diluted solutions by the use of a membrane-less flow-through cell with stainless steel wool electrodes

Detalhes bibliográficos
Autor(a) principal: Almeida,Lucio C
Data de Publicação: 2011
Outros Autores: Bocchi,Nerilso, Rocha-Filho,Romeu C, Biaggio,Sonia R
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=S0103-50532011000900010
Resumo: The removal of Pb2+ ions from dilute solutions was investigated under galvanostatic conditions using a membrane-less flow-through cell with stainless steel wool (SSW) electrodes. The response surface methodology (independent variables: electric current and volumetric flow rate) was used to find the optimal conditions for Pb2+ removal from 2 L of an aqueous solution of 50 mg L-1 Pb(NO3)2 in 0.10 mol L-1 NaNO3 + 0.10 mol L-1 H3BO3 (pH 4.8). The obtained response surfaces revealed that the volumetric flow rate (59-341 L h-1) does not substantially affect the Pb2+ removal process. On the other hand, the electric current increase led to higher Pb2+ removal, with significantly improved values of specific energy consumption and current efficiency when compared with those reported in the literature. For an experiment carried out in the optimum-condition region (70 mA and 200 L h-1), a Pb2+ conversion of 99.6% was attained after 90 min of electrolysis. The use of the membrane-less flow-through cell with SSW electrodes, besides being significantly more energy efficient, led to Pb2+ removal on both electrodes, but predominantly in the SSW anode, on which more than 95% of the Pb2+ ions were converted to PbO2.
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spelling Galvanostatic removal of Pb2+ ions from diluted solutions by the use of a membrane-less flow-through cell with stainless steel wool electrodeselectrolytic removal of Pb2+ ionselectrochemical treatmentPb2+ wastewatersimultaneous cathodic/anodic Pb2+ removalfactorial designresponse surface methodologyThe removal of Pb2+ ions from dilute solutions was investigated under galvanostatic conditions using a membrane-less flow-through cell with stainless steel wool (SSW) electrodes. The response surface methodology (independent variables: electric current and volumetric flow rate) was used to find the optimal conditions for Pb2+ removal from 2 L of an aqueous solution of 50 mg L-1 Pb(NO3)2 in 0.10 mol L-1 NaNO3 + 0.10 mol L-1 H3BO3 (pH 4.8). The obtained response surfaces revealed that the volumetric flow rate (59-341 L h-1) does not substantially affect the Pb2+ removal process. On the other hand, the electric current increase led to higher Pb2+ removal, with significantly improved values of specific energy consumption and current efficiency when compared with those reported in the literature. For an experiment carried out in the optimum-condition region (70 mA and 200 L h-1), a Pb2+ conversion of 99.6% was attained after 90 min of electrolysis. The use of the membrane-less flow-through cell with SSW electrodes, besides being significantly more energy efficient, led to Pb2+ removal on both electrodes, but predominantly in the SSW anode, on which more than 95% of the Pb2+ ions were converted to PbO2.Sociedade Brasileira de Química2011-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900010Journal of the Brazilian Chemical Society v.22 n.9 2011reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532011000900010info:eu-repo/semantics/openAccessAlmeida,Lucio CBocchi,NerilsoRocha-Filho,Romeu CBiaggio,Sonia Reng2011-09-20T00:00:00Zoai:scielo:S0103-50532011000900010Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2011-09-20T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Galvanostatic removal of Pb2+ ions from diluted solutions by the use of a membrane-less flow-through cell with stainless steel wool electrodes
title Galvanostatic removal of Pb2+ ions from diluted solutions by the use of a membrane-less flow-through cell with stainless steel wool electrodes
spellingShingle Galvanostatic removal of Pb2+ ions from diluted solutions by the use of a membrane-less flow-through cell with stainless steel wool electrodes
Almeida,Lucio C
electrolytic removal of Pb2+ ions
electrochemical treatment
Pb2+ wastewater
simultaneous cathodic/anodic Pb2+ removal
factorial design
response surface methodology
title_short Galvanostatic removal of Pb2+ ions from diluted solutions by the use of a membrane-less flow-through cell with stainless steel wool electrodes
title_full Galvanostatic removal of Pb2+ ions from diluted solutions by the use of a membrane-less flow-through cell with stainless steel wool electrodes
title_fullStr Galvanostatic removal of Pb2+ ions from diluted solutions by the use of a membrane-less flow-through cell with stainless steel wool electrodes
title_full_unstemmed Galvanostatic removal of Pb2+ ions from diluted solutions by the use of a membrane-less flow-through cell with stainless steel wool electrodes
title_sort Galvanostatic removal of Pb2+ ions from diluted solutions by the use of a membrane-less flow-through cell with stainless steel wool electrodes
author Almeida,Lucio C
author_facet Almeida,Lucio C
Bocchi,Nerilso
Rocha-Filho,Romeu C
Biaggio,Sonia R
author_role author
author2 Bocchi,Nerilso
Rocha-Filho,Romeu C
Biaggio,Sonia R
author2_role author
author
author
dc.contributor.author.fl_str_mv Almeida,Lucio C
Bocchi,Nerilso
Rocha-Filho,Romeu C
Biaggio,Sonia R
dc.subject.por.fl_str_mv electrolytic removal of Pb2+ ions
electrochemical treatment
Pb2+ wastewater
simultaneous cathodic/anodic Pb2+ removal
factorial design
response surface methodology
topic electrolytic removal of Pb2+ ions
electrochemical treatment
Pb2+ wastewater
simultaneous cathodic/anodic Pb2+ removal
factorial design
response surface methodology
description The removal of Pb2+ ions from dilute solutions was investigated under galvanostatic conditions using a membrane-less flow-through cell with stainless steel wool (SSW) electrodes. The response surface methodology (independent variables: electric current and volumetric flow rate) was used to find the optimal conditions for Pb2+ removal from 2 L of an aqueous solution of 50 mg L-1 Pb(NO3)2 in 0.10 mol L-1 NaNO3 + 0.10 mol L-1 H3BO3 (pH 4.8). The obtained response surfaces revealed that the volumetric flow rate (59-341 L h-1) does not substantially affect the Pb2+ removal process. On the other hand, the electric current increase led to higher Pb2+ removal, with significantly improved values of specific energy consumption and current efficiency when compared with those reported in the literature. For an experiment carried out in the optimum-condition region (70 mA and 200 L h-1), a Pb2+ conversion of 99.6% was attained after 90 min of electrolysis. The use of the membrane-less flow-through cell with SSW electrodes, besides being significantly more energy efficient, led to Pb2+ removal on both electrodes, but predominantly in the SSW anode, on which more than 95% of the Pb2+ ions were converted to PbO2.
publishDate 2011
dc.date.none.fl_str_mv 2011-09-01
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=S0103-50532011000900010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900010
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532011000900010
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.22 n.9 2011
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
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