Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?

Detalhes bibliográficos
Autor(a) principal: Júlio, Maria de Fátima de Jesus Leal
Data de Publicação: 2011
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/7066
Resumo: Dissertação para Obtenção de Grau de Mestre em Engenharia Química e Bioquímica
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spelling Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?Activated carbon adsorptionDrinking water treatmentMicrocystin-LRNatural organic matter competitionActivated carbon structureActivated carbon surface chemistryDissertação para Obtenção de Grau de Mestre em Engenharia Química e BioquímicaThe carbon key-properties (structure and surface chemistry) for microcystin-LR (MC-LR) adsorption onto activated carbon were investigated. Waters with an inorganic background matrix approaching that of the soft natural water (2.5 mM ionic strength) were used. Also, model waters with controlled ionic make-up and NOM surrogate with similar size of MC-LR (tannic acid - TA) with MC-LR extracts were tested with activated carbon NORIT 0.8 SUPRA. For this AC, two particle sizes, 125-180 μm and 63-90 μm were tested. The surface chemistry of NOR 125-180 μm was modified by thermal treatment and was also preloaded with TA. The integrated analysis of carbon’s chemical and textural characterization and of kinetic and isotherm modeling using non-linear models allowed concluding that: i) the heating method is an efficient and simple process for reducing a relatively hydrophilic activated carbon and thereby enhancing its MC-LR adsorption capacity; ii) from a combination of the modification of the carbon surface chemistry and the carbon structure, it is demonstrates that both properties play an important role in the adsorption process, although carbon surface chemistry seems to be more important than its porous structure – MC-LR adsorption correlated with meso and macroporous volume and particularly well with carbon hydrophobicity (inverse of oxygen content); iii) the smaller the particle size, the more important is external mass transfer over intraparticle diffusion; iv) similar sized NOM strongly competes with MC-LR for the same AC sites; v) direct competition governs the simultaneous MC-LR and NOM adsorption; vi) the preloading phenomena reduces significantly the performance of activated carbon adsorption.Faculdade de Ciências e TecnologiaViegas, RuiFonseca, IsabelRUNJúlio, Maria de Fátima de Jesus Leal2012-02-15T11:47:37Z20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/7066enginfo: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:RCAAP2024-03-11T03:38:38Zoai:run.unl.pt:10362/7066Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:17:11.589303Repositório 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 Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?
title Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?
spellingShingle Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?
Júlio, Maria de Fátima de Jesus Leal
Activated carbon adsorption
Drinking water treatment
Microcystin-LR
Natural organic matter competition
Activated carbon structure
Activated carbon surface chemistry
title_short Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?
title_full Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?
title_fullStr Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?
title_full_unstemmed Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?
title_sort Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?
author Júlio, Maria de Fátima de Jesus Leal
author_facet Júlio, Maria de Fátima de Jesus Leal
author_role author
dc.contributor.none.fl_str_mv Viegas, Rui
Fonseca, Isabel
RUN
dc.contributor.author.fl_str_mv Júlio, Maria de Fátima de Jesus Leal
dc.subject.por.fl_str_mv Activated carbon adsorption
Drinking water treatment
Microcystin-LR
Natural organic matter competition
Activated carbon structure
Activated carbon surface chemistry
topic Activated carbon adsorption
Drinking water treatment
Microcystin-LR
Natural organic matter competition
Activated carbon structure
Activated carbon surface chemistry
description Dissertação para Obtenção de Grau de Mestre em Engenharia Química e Bioquímica
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-01-01T00:00:00Z
2012-02-15T11:47:37Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/7066
url http://hdl.handle.net/10362/7066
dc.language.iso.fl_str_mv eng
language eng
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 Faculdade de Ciências e Tecnologia
publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
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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