Coagulant properties of Moringa oleifera protein preparations: application to humic acids removal
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/22518 |
Resumo: | This work aimed to characterize the coagulant properties of protein preparations from Moringa oleifera seeds to remove humic acids from water. Three distinct preparations were assayed, namely extract (seeds homogenized with 0.15 M NaCl), fraction (extract precipitated with 60 % w/v ammonium sulphate) and cMoL (protein purified with guar gel column chromatography). The extract showed the highest coagulant activity in a protein concentration between 1 mg/L and 180 mg/L at pH 7.0. The zeta potential of the extract (-10 mV to -15 mV) was less negative than that of the humic acid (-41 mV to -42 mV) in a pH range between 5.0 and 8.0; thus, the mechanism that might be involved in this coagulation activity is adsorption and neutralisation of charges. Reduction of total organic carbon (TOC) and dissolved organic carbon (DOC) was observed in water samples containing 9 mg/L carbon as humic acid when treated with 1 mg/L of the extract. It was also observed a decrease in colour and in the aromatic content of the treated water. These results suggested that the extract from M. oleifera seeds in a low concentration (1 mg/L) can be an interesting natural alternative to remove humic acid from water in developing countries. The dose of extract determined in the present study do not impart odour and colour to the treated water. |
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Coagulant properties of Moringa oleifera protein preparations: application to humic acids removalMoringa oleiferaHumic acidsLectinWater treatmentNatural coagulantScience & TechnologyThis work aimed to characterize the coagulant properties of protein preparations from Moringa oleifera seeds to remove humic acids from water. Three distinct preparations were assayed, namely extract (seeds homogenized with 0.15 M NaCl), fraction (extract precipitated with 60 % w/v ammonium sulphate) and cMoL (protein purified with guar gel column chromatography). The extract showed the highest coagulant activity in a protein concentration between 1 mg/L and 180 mg/L at pH 7.0. The zeta potential of the extract (-10 mV to -15 mV) was less negative than that of the humic acid (-41 mV to -42 mV) in a pH range between 5.0 and 8.0; thus, the mechanism that might be involved in this coagulation activity is adsorption and neutralisation of charges. Reduction of total organic carbon (TOC) and dissolved organic carbon (DOC) was observed in water samples containing 9 mg/L carbon as humic acid when treated with 1 mg/L of the extract. It was also observed a decrease in colour and in the aromatic content of the treated water. These results suggested that the extract from M. oleifera seeds in a low concentration (1 mg/L) can be an interesting natural alternative to remove humic acid from water in developing countries. The dose of extract determined in the present study do not impart odour and colour to the treated water.The authors acknowledge the financial support from the Portuguese Fundacao para Ciencia e a Tecnologia (FCT), through the post-doctoral grant SFRH/BPD/37349/2007, and the Brazilian programmes: Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), VALNATURA ALFA and the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES).Taylor and FrancisUniversidade do MinhoSantos, Andréa F. S.Paiva, Patrícia M. G.Teixeira, J. A.Brito, A. G.Coelho, L. C. B. B.Nogueira, R.2012-012012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/22518engSantos, A. F. S., Paiva, P. M. G., Teixeira, J. A. C., Brito, A. G., Coelho, L. C. B. B., & Nogueira, R. (2012, January). Coagulant properties ofMoringa oleiferaprotein preparations: application to humic acid removal. Environmental Technology. Informa UK Limited. http://doi.org/10.1080/09593330.2010.5503230959-333010.1080/09593330.2010.55032322519089http://dx.doi.org/10.1080/09593330.2010.550323info: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:RCAAP2023-07-21T12:20:06Zoai:repositorium.sdum.uminho.pt:1822/22518Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:13:10.383163Repositório 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 |
Coagulant properties of Moringa oleifera protein preparations: application to humic acids removal |
title |
Coagulant properties of Moringa oleifera protein preparations: application to humic acids removal |
spellingShingle |
Coagulant properties of Moringa oleifera protein preparations: application to humic acids removal Santos, Andréa F. S. Moringa oleifera Humic acids Lectin Water treatment Natural coagulant Science & Technology |
title_short |
Coagulant properties of Moringa oleifera protein preparations: application to humic acids removal |
title_full |
Coagulant properties of Moringa oleifera protein preparations: application to humic acids removal |
title_fullStr |
Coagulant properties of Moringa oleifera protein preparations: application to humic acids removal |
title_full_unstemmed |
Coagulant properties of Moringa oleifera protein preparations: application to humic acids removal |
title_sort |
Coagulant properties of Moringa oleifera protein preparations: application to humic acids removal |
author |
Santos, Andréa F. S. |
author_facet |
Santos, Andréa F. S. Paiva, Patrícia M. G. Teixeira, J. A. Brito, A. G. Coelho, L. C. B. B. Nogueira, R. |
author_role |
author |
author2 |
Paiva, Patrícia M. G. Teixeira, J. A. Brito, A. G. Coelho, L. C. B. B. Nogueira, R. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Santos, Andréa F. S. Paiva, Patrícia M. G. Teixeira, J. A. Brito, A. G. Coelho, L. C. B. B. Nogueira, R. |
dc.subject.por.fl_str_mv |
Moringa oleifera Humic acids Lectin Water treatment Natural coagulant Science & Technology |
topic |
Moringa oleifera Humic acids Lectin Water treatment Natural coagulant Science & Technology |
description |
This work aimed to characterize the coagulant properties of protein preparations from Moringa oleifera seeds to remove humic acids from water. Three distinct preparations were assayed, namely extract (seeds homogenized with 0.15 M NaCl), fraction (extract precipitated with 60 % w/v ammonium sulphate) and cMoL (protein purified with guar gel column chromatography). The extract showed the highest coagulant activity in a protein concentration between 1 mg/L and 180 mg/L at pH 7.0. The zeta potential of the extract (-10 mV to -15 mV) was less negative than that of the humic acid (-41 mV to -42 mV) in a pH range between 5.0 and 8.0; thus, the mechanism that might be involved in this coagulation activity is adsorption and neutralisation of charges. Reduction of total organic carbon (TOC) and dissolved organic carbon (DOC) was observed in water samples containing 9 mg/L carbon as humic acid when treated with 1 mg/L of the extract. It was also observed a decrease in colour and in the aromatic content of the treated water. These results suggested that the extract from M. oleifera seeds in a low concentration (1 mg/L) can be an interesting natural alternative to remove humic acid from water in developing countries. The dose of extract determined in the present study do not impart odour and colour to the treated water. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-01 2012-01-01T00:00:00Z |
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 |
https://hdl.handle.net/1822/22518 |
url |
https://hdl.handle.net/1822/22518 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Santos, A. F. S., Paiva, P. M. G., Teixeira, J. A. C., Brito, A. G., Coelho, L. C. B. B., & Nogueira, R. (2012, January). Coagulant properties ofMoringa oleiferaprotein preparations: application to humic acid removal. Environmental Technology. Informa UK Limited. http://doi.org/10.1080/09593330.2010.550323 0959-3330 10.1080/09593330.2010.550323 22519089 http://dx.doi.org/10.1080/09593330.2010.550323 |
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 and Francis |
publisher.none.fl_str_mv |
Taylor and 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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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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 |
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1799132569475743744 |