An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes

Detalhes bibliográficos
Autor(a) principal: Pinheiro, Ineide
Data de Publicação: 2013
Outros Autores: Ferreira, Paulo J., Garcia, Fernando A., Reis, Marco S., Pereira, Ana C., Wandrey, Christine, Ahmadloo, Hamideh, Amaral, José L., Hunkeler, David, Rasteiro, Maria G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/80330
https://doi.org/10.1016/j.powtec.2012.08.004
Resumo: Aggregation of particles is fundamental for improving the performance of many solid/liquid processes. Aggregation can be induced by different means, and one of the most common is based on the addition of polymeric additives, namely polyelectrolytes. In this work we have studied the flocculation of precipitated calcium carbonate (PCC), which is used as a filler in papermaking, and is induced by a range of cationic polyacrylamides with different structures, varying in molar mass and degree of branching. The flocculation process was monitored continuously using the LDS technique (laser diffraction scattering), which provides information about the size distribution and structure (fractal dimension) of the aggregates, for each sampling instant and, thus, about the kinetic curve for the flocculation process. This information has then been used to produce a model, based on an experimental design strategy, which allows us to relate flocculation efficiency with the PEL characteristics and concentration. The Partial Least Squares (PLS) regression method was selected to perform the regression, given the significant co linearity among the input variables. The results obtained lead us to conclude that the polymer intrinsic viscosity (related with the PEL molar mass and charge density, and supplying information about the volume of the polymer molecule in the solution) and the degree of branching are the parameters with a stronger influence on flocculation efficiency. The PLS models developed were also successfully validated using an independent data set, which provides confidence on their consistency and prediction accuracy.
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spelling An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytesFlocculationPartial least squares regressionPolyelectrolytesLDSAggregation of particles is fundamental for improving the performance of many solid/liquid processes. Aggregation can be induced by different means, and one of the most common is based on the addition of polymeric additives, namely polyelectrolytes. In this work we have studied the flocculation of precipitated calcium carbonate (PCC), which is used as a filler in papermaking, and is induced by a range of cationic polyacrylamides with different structures, varying in molar mass and degree of branching. The flocculation process was monitored continuously using the LDS technique (laser diffraction scattering), which provides information about the size distribution and structure (fractal dimension) of the aggregates, for each sampling instant and, thus, about the kinetic curve for the flocculation process. This information has then been used to produce a model, based on an experimental design strategy, which allows us to relate flocculation efficiency with the PEL characteristics and concentration. The Partial Least Squares (PLS) regression method was selected to perform the regression, given the significant co linearity among the input variables. The results obtained lead us to conclude that the polymer intrinsic viscosity (related with the PEL molar mass and charge density, and supplying information about the volume of the polymer molecule in the solution) and the degree of branching are the parameters with a stronger influence on flocculation efficiency. The PLS models developed were also successfully validated using an independent data set, which provides confidence on their consistency and prediction accuracy.2013info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/80330http://hdl.handle.net/10316/80330https://doi.org/10.1016/j.powtec.2012.08.004engPINHEIRO, Ineide; FERREIRA, Paulo J.; GARCIA, Fernando A. Garcia; REIS, Marco S.; PEREIRA, Ana C.; WANDREY, Christine; AHMADLOO, Hamideh; AMARAL, José L.; HUNKELER, David; RASTEIRO, Maria G. - An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes. Powder Technology. 238 (2013) 2-13.Pinheiro, IneideFerreira, Paulo J.Garcia, Fernando A.Reis, Marco S.Pereira, Ana C.Wandrey, ChristineAhmadloo, HamidehAmaral, José L.Hunkeler, DavidRasteiro, Maria G.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2021-08-31T09:22:15Zoai:estudogeral.uc.pt:10316/80330Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:02:47.184848Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes
title An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes
spellingShingle An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes
Pinheiro, Ineide
Flocculation
Partial least squares regression
Polyelectrolytes
LDS
title_short An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes
title_full An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes
title_fullStr An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes
title_full_unstemmed An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes
title_sort An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes
author Pinheiro, Ineide
author_facet Pinheiro, Ineide
Ferreira, Paulo J.
Garcia, Fernando A.
Reis, Marco S.
Pereira, Ana C.
Wandrey, Christine
Ahmadloo, Hamideh
Amaral, José L.
Hunkeler, David
Rasteiro, Maria G.
author_role author
author2 Ferreira, Paulo J.
Garcia, Fernando A.
Reis, Marco S.
Pereira, Ana C.
Wandrey, Christine
Ahmadloo, Hamideh
Amaral, José L.
Hunkeler, David
Rasteiro, Maria G.
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Pinheiro, Ineide
Ferreira, Paulo J.
Garcia, Fernando A.
Reis, Marco S.
Pereira, Ana C.
Wandrey, Christine
Ahmadloo, Hamideh
Amaral, José L.
Hunkeler, David
Rasteiro, Maria G.
dc.subject.por.fl_str_mv Flocculation
Partial least squares regression
Polyelectrolytes
LDS
topic Flocculation
Partial least squares regression
Polyelectrolytes
LDS
description Aggregation of particles is fundamental for improving the performance of many solid/liquid processes. Aggregation can be induced by different means, and one of the most common is based on the addition of polymeric additives, namely polyelectrolytes. In this work we have studied the flocculation of precipitated calcium carbonate (PCC), which is used as a filler in papermaking, and is induced by a range of cationic polyacrylamides with different structures, varying in molar mass and degree of branching. The flocculation process was monitored continuously using the LDS technique (laser diffraction scattering), which provides information about the size distribution and structure (fractal dimension) of the aggregates, for each sampling instant and, thus, about the kinetic curve for the flocculation process. This information has then been used to produce a model, based on an experimental design strategy, which allows us to relate flocculation efficiency with the PEL characteristics and concentration. The Partial Least Squares (PLS) regression method was selected to perform the regression, given the significant co linearity among the input variables. The results obtained lead us to conclude that the polymer intrinsic viscosity (related with the PEL molar mass and charge density, and supplying information about the volume of the polymer molecule in the solution) and the degree of branching are the parameters with a stronger influence on flocculation efficiency. The PLS models developed were also successfully validated using an independent data set, which provides confidence on their consistency and prediction accuracy.
publishDate 2013
dc.date.none.fl_str_mv 2013
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 http://hdl.handle.net/10316/80330
http://hdl.handle.net/10316/80330
https://doi.org/10.1016/j.powtec.2012.08.004
url http://hdl.handle.net/10316/80330
https://doi.org/10.1016/j.powtec.2012.08.004
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv PINHEIRO, Ineide; FERREIRA, Paulo J.; GARCIA, Fernando A. Garcia; REIS, Marco S.; PEREIRA, Ana C.; WANDREY, Christine; AHMADLOO, Hamideh; AMARAL, José L.; HUNKELER, David; RASTEIRO, Maria G. - An experimental design methodology to evaluate the importance of different parameters on flocculation by polyelectrolytes. Powder Technology. 238 (2013) 2-13.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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