Substâncias húmicas: Sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular
Autor(a) principal: | |
---|---|
Data de Publicação: | 2000 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/231667 |
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. |
id |
UNSP_686f1c980fb264ed1729cfe3af57d3e2 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/231667 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Substâncias húmicas: Sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecularHumic substances: A sequential device for fractionation by ultrafiltration with molecular size basisFractionationHumic substancesUltrafiltrationA 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.Inst. de Quim. de Araraquara UNESP, CP 355, 14800-900 - Araraquara - SPInst. Nac. de Pesq. da Amazonia, CP 478, 69083-000 - Manaus - AMInst. Spectrochemistry Appl. S., D-44139 - DortmundInst. de Quim. de Araraquara UNESP, CP 355, 14800-900 - Araraquara - SPUniversidade Estadual Paulista (UNESP)Inst. Nac. de Pesq. da AmazoniaInst. Spectrochemistry Appl. S.Rocha, Julio Cesar [UNESP]Zara, Luiz Fabricio [UNESP]Rosa, André Henrique [UNESP]Sargentini Jr., ÉzioBurba, Peter2022-04-29T08:46:51Z2022-04-29T08:46:51Z2000-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article410-412Quimica Nova, v. 23, n. 3, p. 410-412, 2000.0100-4042http://hdl.handle.net/11449/2316672-s2.0-0012231368Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporQuimica Novainfo:eu-repo/semantics/openAccess2022-04-29T08:46:51Zoai:repositorio.unesp.br:11449/231667Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:30:18.719497Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Substâncias húmicas: Sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular Humic substances: A sequential device for fractionation by ultrafiltration with molecular size basis |
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 [UNESP] Fractionation Humic substances 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 [UNESP] |
author_facet |
Rocha, Julio Cesar [UNESP] Zara, Luiz Fabricio [UNESP] Rosa, André Henrique [UNESP] Sargentini Jr., Ézio Burba, Peter |
author_role |
author |
author2 |
Zara, Luiz Fabricio [UNESP] Rosa, André Henrique [UNESP] Sargentini Jr., Ézio Burba, Peter |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Inst. Nac. de Pesq. da Amazonia Inst. Spectrochemistry Appl. S. |
dc.contributor.author.fl_str_mv |
Rocha, Julio Cesar [UNESP] Zara, Luiz Fabricio [UNESP] Rosa, André Henrique [UNESP] Sargentini Jr., Ézio Burba, Peter |
dc.subject.por.fl_str_mv |
Fractionation Humic substances Ultrafiltration |
topic |
Fractionation Humic substances 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 |
2000-05-01 2022-04-29T08:46:51Z 2022-04-29T08:46:51Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Quimica Nova, v. 23, n. 3, p. 410-412, 2000. 0100-4042 http://hdl.handle.net/11449/231667 2-s2.0-0012231368 |
identifier_str_mv |
Quimica Nova, v. 23, n. 3, p. 410-412, 2000. 0100-4042 2-s2.0-0012231368 |
url |
http://hdl.handle.net/11449/231667 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Quimica Nova |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
410-412 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128522400563200 |