Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular
Autor(a) principal: | |
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Data de Publicação: | 2000 |
Outros Autores: | , , , |
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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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 |
_version_ |
1750318101601189888 |