Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular

Detalhes bibliográficos
Autor(a) principal: Rocha,Julio Cesar
Data de Publicação: 2000
Outros Autores: Zara,Luiz Fabricio, Rosa,André Henrique, Sargentini Junior,Ézio, Burba,Peter
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422000000300020
Resumo: A sequential system for fractionation by ultrafiltration (SSFU) equipped with advanced membranes filters (molecular size cut-off: 5, 10, 30, 50 and 100 kDalton) of the polyethersulfone type was developed for analytical fractionation of humic substances (HS) extracted from aquatic systems or soils. The device consists of five membrane filters (Sartocon® Micro) operated by a multi-channel peristaltic pump, enabling an easy handling, working in a closed system and with simple collection of the six obtained fractions (F1>100; F2: 100-50; F3: 50-30; F4:30-10; F5: 10-5 and F6 <5 kDalton). Then, the HS sample (250 mL solution 1.0 mg/mL, pH 5.0 to 6.0) to be fractionated is pumped by pump through the series of membrane filters with a tangential flow of 85 mL/min, initial pressure 0.2 to 0.3 bar and permeation flux through the membranes of 0.8 to 1.4 mL/min. The overall time for fractionation and cleaning of the device is about 10 h and 25 mL of each fraction is obtained.
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spelling Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecularhumic substancesfractionationultrafiltrationA sequential system for fractionation by ultrafiltration (SSFU) equipped with advanced membranes filters (molecular size cut-off: 5, 10, 30, 50 and 100 kDalton) of the polyethersulfone type was developed for analytical fractionation of humic substances (HS) extracted from aquatic systems or soils. The device consists of five membrane filters (Sartocon® Micro) operated by a multi-channel peristaltic pump, enabling an easy handling, working in a closed system and with simple collection of the six obtained fractions (F1>100; F2: 100-50; F3: 50-30; F4:30-10; F5: 10-5 and F6 <5 kDalton). Then, the HS sample (250 mL solution 1.0 mg/mL, pH 5.0 to 6.0) to be fractionated is pumped by pump through the series of membrane filters with a tangential flow of 85 mL/min, initial pressure 0.2 to 0.3 bar and permeation flux through the membranes of 0.8 to 1.4 mL/min. The overall time for fractionation and cleaning of the device is about 10 h and 25 mL of each fraction is obtained.Sociedade Brasileira de Química2000-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422000000300020Química Nova v.23 n.3 2000reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422000000300020info:eu-repo/semantics/openAccessRocha,Julio CesarZara,Luiz FabricioRosa,André HenriqueSargentini Junior,ÉzioBurba,Peterpor2000-12-08T00:00:00Zoai:scielo:S0100-40422000000300020Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2000-12-08T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular
title Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular
spellingShingle Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular
Rocha,Julio Cesar
humic substances
fractionation
ultrafiltration
title_short Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular
title_full Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular
title_fullStr Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular
title_full_unstemmed Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular
title_sort Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular
author Rocha,Julio Cesar
author_facet Rocha,Julio Cesar
Zara,Luiz Fabricio
Rosa,André Henrique
Sargentini Junior,Ézio
Burba,Peter
author_role author
author2 Zara,Luiz Fabricio
Rosa,André Henrique
Sargentini Junior,Ézio
Burba,Peter
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Rocha,Julio Cesar
Zara,Luiz Fabricio
Rosa,André Henrique
Sargentini Junior,Ézio
Burba,Peter
dc.subject.por.fl_str_mv humic substances
fractionation
ultrafiltration
topic humic substances
fractionation
ultrafiltration
description A sequential system for fractionation by ultrafiltration (SSFU) equipped with advanced membranes filters (molecular size cut-off: 5, 10, 30, 50 and 100 kDalton) of the polyethersulfone type was developed for analytical fractionation of humic substances (HS) extracted from aquatic systems or soils. The device consists of five membrane filters (Sartocon® Micro) operated by a multi-channel peristaltic pump, enabling an easy handling, working in a closed system and with simple collection of the six obtained fractions (F1>100; F2: 100-50; F3: 50-30; F4:30-10; F5: 10-5 and F6 <5 kDalton). Then, the HS sample (250 mL solution 1.0 mg/mL, pH 5.0 to 6.0) to be fractionated is pumped by pump through the series of membrane filters with a tangential flow of 85 mL/min, initial pressure 0.2 to 0.3 bar and permeation flux through the membranes of 0.8 to 1.4 mL/min. The overall time for fractionation and cleaning of the device is about 10 h and 25 mL of each fraction is obtained.
publishDate 2000
dc.date.none.fl_str_mv 2000-06-01
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=S0100-40422000000300020
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422000000300020
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422000000300020
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 Química Nova v.23 n.3 2000
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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