Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systems

Autores
Pinotti, Adriana Noemí; Bevilacqua, Alicia Eva; Zaritzky, Noemí Elisabet
Año de publicación
2001
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Food industries contribute significantly to the pollution of water streams. Oil in wastewaters must be removed to prevent fouling of process equipment, to reduce interference with subsequent water-treatment units, and to comply with water-discharge requirements. Polyelectrolytes are frequently used to coagulate and flocculate colloidal systems. A model system of a sunflower oil/water emulsion was used to analyze the effect of: (i) emulsion droplet sizes, (ii) surfactant chain length (sodium dodecyl sulfate and sodium tetradecyl sulfate), (iii) ionic strength, and (iv) pH, on the doses of chitosan (natural cationic polyelectrolyte) and a cationic polyacrylamide, necessary to neutralize electrical charge and to get flocculation. Methods used were: turbidimetry, jar test, colloidal titration, and light microscopy observation. Results showed that the increase of NaCl concentration reduces the doses of chitosan and polyacrylamide to reach zero colloidal charge; these doses increase with the surfactant chain length. pH variation did not show any influence on the chitosan dose necessary to flocculate the system. Redispersion of the emulsion was observed in chitosan and polyacrylamide treatments.
Centro de Investigación y Desarrollo en Criotecnología de Alimentos
Facultad de Ingeniería
Materia
Química
Chitosan
Emulsions
Flocculation
Polyacrylamide
Polyelectrolytes
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/138731
Acceder
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network_name_str SEDICI (UNLP)
spelling Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systemsPinotti, Adriana NoemíBevilacqua, Alicia EvaZaritzky, Noemí ElisabetQuímicaChitosanEmulsionsFlocculationPolyacrylamidePolyelectrolytesFood industries contribute significantly to the pollution of water streams. Oil in wastewaters must be removed to prevent fouling of process equipment, to reduce interference with subsequent water-treatment units, and to comply with water-discharge requirements. Polyelectrolytes are frequently used to coagulate and flocculate colloidal systems. A model system of a sunflower oil/water emulsion was used to analyze the effect of: (i) emulsion droplet sizes, (ii) surfactant chain length (sodium dodecyl sulfate and sodium tetradecyl sulfate), (iii) ionic strength, and (iv) pH, on the doses of chitosan (natural cationic polyelectrolyte) and a cationic polyacrylamide, necessary to neutralize electrical charge and to get flocculation. Methods used were: turbidimetry, jar test, colloidal titration, and light microscopy observation. Results showed that the increase of NaCl concentration reduces the doses of chitosan and polyacrylamide to reach zero colloidal charge; these doses increase with the surfactant chain length. pH variation did not show any influence on the chitosan dose necessary to flocculate the system. Redispersion of the emulsion was observed in chitosan and polyacrylamide treatments.Centro de Investigación y Desarrollo en Criotecnología de AlimentosFacultad de Ingeniería2001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf57-63http://sedici.unlp.edu.ar/handle/10915/138731enginfo:eu-repo/semantics/altIdentifier/issn/1097-3958info:eu-repo/semantics/altIdentifier/issn/1558-9293info:eu-repo/semantics/altIdentifier/doi/10.1007/s11743-001-0160-xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T11:04:38Zoai:sedici.unlp.edu.ar:10915/138731Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:04:38.303SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systems
title Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systems
spellingShingle Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systems
Pinotti, Adriana Noemí
Química
Chitosan
Emulsions
Flocculation
Polyacrylamide
Polyelectrolytes
title_short Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systems
title_full Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systems
title_fullStr Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systems
title_full_unstemmed Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systems
title_sort Comparison of the performance of chitosan and a cationic polyacrylamide as flocculants of emulsion systems
dc.creator.none.fl_str_mv Pinotti, Adriana Noemí
Bevilacqua, Alicia Eva
Zaritzky, Noemí Elisabet
author Pinotti, Adriana Noemí
author_facet Pinotti, Adriana Noemí
Bevilacqua, Alicia Eva
Zaritzky, Noemí Elisabet
author_role author
author2 Bevilacqua, Alicia Eva
Zaritzky, Noemí Elisabet
author2_role author
author
dc.subject.none.fl_str_mv Química
Chitosan
Emulsions
Flocculation
Polyacrylamide
Polyelectrolytes
topic Química
Chitosan
Emulsions
Flocculation
Polyacrylamide
Polyelectrolytes
dc.description.none.fl_txt_mv Food industries contribute significantly to the pollution of water streams. Oil in wastewaters must be removed to prevent fouling of process equipment, to reduce interference with subsequent water-treatment units, and to comply with water-discharge requirements. Polyelectrolytes are frequently used to coagulate and flocculate colloidal systems. A model system of a sunflower oil/water emulsion was used to analyze the effect of: (i) emulsion droplet sizes, (ii) surfactant chain length (sodium dodecyl sulfate and sodium tetradecyl sulfate), (iii) ionic strength, and (iv) pH, on the doses of chitosan (natural cationic polyelectrolyte) and a cationic polyacrylamide, necessary to neutralize electrical charge and to get flocculation. Methods used were: turbidimetry, jar test, colloidal titration, and light microscopy observation. Results showed that the increase of NaCl concentration reduces the doses of chitosan and polyacrylamide to reach zero colloidal charge; these doses increase with the surfactant chain length. pH variation did not show any influence on the chitosan dose necessary to flocculate the system. Redispersion of the emulsion was observed in chitosan and polyacrylamide treatments.
Centro de Investigación y Desarrollo en Criotecnología de Alimentos
Facultad de Ingeniería
description Food industries contribute significantly to the pollution of water streams. Oil in wastewaters must be removed to prevent fouling of process equipment, to reduce interference with subsequent water-treatment units, and to comply with water-discharge requirements. Polyelectrolytes are frequently used to coagulate and flocculate colloidal systems. A model system of a sunflower oil/water emulsion was used to analyze the effect of: (i) emulsion droplet sizes, (ii) surfactant chain length (sodium dodecyl sulfate and sodium tetradecyl sulfate), (iii) ionic strength, and (iv) pH, on the doses of chitosan (natural cationic polyelectrolyte) and a cationic polyacrylamide, necessary to neutralize electrical charge and to get flocculation. Methods used were: turbidimetry, jar test, colloidal titration, and light microscopy observation. Results showed that the increase of NaCl concentration reduces the doses of chitosan and polyacrylamide to reach zero colloidal charge; these doses increase with the surfactant chain length. pH variation did not show any influence on the chitosan dose necessary to flocculate the system. Redispersion of the emulsion was observed in chitosan and polyacrylamide treatments.
publishDate 2001
dc.date.none.fl_str_mv 2001
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/138731
url http://sedici.unlp.edu.ar/handle/10915/138731
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1097-3958
info:eu-repo/semantics/altIdentifier/issn/1558-9293
info:eu-repo/semantics/altIdentifier/doi/10.1007/s11743-001-0160-x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
57-63
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.13397

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