Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions

Detalhes bibliográficos
Autor(a) principal: Araújo, Diana
Data de Publicação: 2020
Outros Autores: Concórdio-Reis, Patrícia, Marques, Ana C., Sevrin, Chantal, Grandfils, Christian, Delgado Alves, Vitor
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/22095
Resumo: In this study, the flocculation properties of FucoPol, a bacterial extracellular polysaccharide, were investigated. FucoPol is a high molecular weight polymer and negatively charged due to the presence of glucuronic acid and the acyl groups succinyl and pyruvyl. High flocculation rate values (>70%) were achieved with a low bioflocculant dosage of 1 mg/L, for pH values in the range 3–5 and temperature within 15–20°C. The bioflocculant was also shown to be stable after freezing/thawing and heating up to 100°C. Given the polymer’s anionic character, the size of flocs formed and their surface profile, bridging seems to be the main flocculation mechanism of FucoPol. This study demonstrated that FucoPol is a promising natural, biodegradable and biocompatible alternative to the currently used synthetic or inorganic hazardous products, with potential to be used as a novel flocculation agent in several applications, such as water treatment, food or mining. Further studies will involve evaluating the reduction of cation dosage on flocculation efficiency, as well as testing the applicability of FucoPol to flocculate different types of suspended solids, such as, for example, activated carbons, soil solids or yeast cells
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spelling Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensionskaolinflocculationEnterobacter E47exoplysaccharideFucoPolIn this study, the flocculation properties of FucoPol, a bacterial extracellular polysaccharide, were investigated. FucoPol is a high molecular weight polymer and negatively charged due to the presence of glucuronic acid and the acyl groups succinyl and pyruvyl. High flocculation rate values (>70%) were achieved with a low bioflocculant dosage of 1 mg/L, for pH values in the range 3–5 and temperature within 15–20°C. The bioflocculant was also shown to be stable after freezing/thawing and heating up to 100°C. Given the polymer’s anionic character, the size of flocs formed and their surface profile, bridging seems to be the main flocculation mechanism of FucoPol. This study demonstrated that FucoPol is a promising natural, biodegradable and biocompatible alternative to the currently used synthetic or inorganic hazardous products, with potential to be used as a novel flocculation agent in several applications, such as water treatment, food or mining. Further studies will involve evaluating the reduction of cation dosage on flocculation efficiency, as well as testing the applicability of FucoPol to flocculate different types of suspended solids, such as, for example, activated carbons, soil solids or yeast cellsTaylor & FrancisRepositório da Universidade de LisboaAraújo, DianaConcórdio-Reis, PatríciaMarques, Ana C.Sevrin, ChantalGrandfils, ChristianDelgado Alves, Vitor2021-09-29T11:10:01Z20202020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/22095engEnvironmental Technology, Volume 41, Issue 3 , 2020https://doi.org/10.1080/09593330.2018.1497710info: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:RCAAP2023-03-06T14:51:40Zoai:www.repository.utl.pt:10400.5/22095Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:06:35.817778Repositório 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 Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions
title Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions
spellingShingle Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions
Araújo, Diana
kaolin
flocculation
Enterobacter E47
exoplysaccharide
FucoPol
title_short Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions
title_full Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions
title_fullStr Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions
title_full_unstemmed Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions
title_sort Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions
author Araújo, Diana
author_facet Araújo, Diana
Concórdio-Reis, Patrícia
Marques, Ana C.
Sevrin, Chantal
Grandfils, Christian
Delgado Alves, Vitor
author_role author
author2 Concórdio-Reis, Patrícia
Marques, Ana C.
Sevrin, Chantal
Grandfils, Christian
Delgado Alves, Vitor
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Araújo, Diana
Concórdio-Reis, Patrícia
Marques, Ana C.
Sevrin, Chantal
Grandfils, Christian
Delgado Alves, Vitor
dc.subject.por.fl_str_mv kaolin
flocculation
Enterobacter E47
exoplysaccharide
FucoPol
topic kaolin
flocculation
Enterobacter E47
exoplysaccharide
FucoPol
description In this study, the flocculation properties of FucoPol, a bacterial extracellular polysaccharide, were investigated. FucoPol is a high molecular weight polymer and negatively charged due to the presence of glucuronic acid and the acyl groups succinyl and pyruvyl. High flocculation rate values (>70%) were achieved with a low bioflocculant dosage of 1 mg/L, for pH values in the range 3–5 and temperature within 15–20°C. The bioflocculant was also shown to be stable after freezing/thawing and heating up to 100°C. Given the polymer’s anionic character, the size of flocs formed and their surface profile, bridging seems to be the main flocculation mechanism of FucoPol. This study demonstrated that FucoPol is a promising natural, biodegradable and biocompatible alternative to the currently used synthetic or inorganic hazardous products, with potential to be used as a novel flocculation agent in several applications, such as water treatment, food or mining. Further studies will involve evaluating the reduction of cation dosage on flocculation efficiency, as well as testing the applicability of FucoPol to flocculate different types of suspended solids, such as, for example, activated carbons, soil solids or yeast cells
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-01-01T00:00:00Z
2021-09-29T11:10:01Z
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/10400.5/22095
url http://hdl.handle.net/10400.5/22095
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Environmental Technology, Volume 41, Issue 3 , 2020
https://doi.org/10.1080/09593330.2018.1497710
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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