Succinylated Starches for Dye Removal

Succinylated bitter cassava starches are evaluated for the removal of cationic, methylene blue (MB) and anionic, methyl orange (MO) dyes present in water. The native starch (NS) extracted from bitter cassava by the dry method, is modified using succinic anhydride (SA) as esterifying agent and sodium...

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Detalles Bibliográficos
Autores: Soto, Diana, León, Orietta, Muñoz-Bonilla, Alexandra, Fernández-García, Marta
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/223721
Acceso en línea:http://hdl.handle.net/10261/223721
Access Level:acceso abierto
Palabra clave:Dyes
Oxidation
Removal
Succinylated starches
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spelling Succinylated Starches for Dye RemovalSoto, DianaLeón, OriettaMuñoz-Bonilla, AlexandraFernández-García, MartaDyesOxidationRemovalSuccinylated starchesSuccinylated bitter cassava starches are evaluated for the removal of cationic, methylene blue (MB) and anionic, methyl orange (MO) dyes present in water. The native starch (NS) extracted from bitter cassava by the dry method, is modified using succinic anhydride (SA) as esterifying agent and sodium hydroxide, sodium carbonate, sodium sulfate, and sodium chloride as non-toxic and environmentally friendly catalysts. The effect of the type and concentration of catalyst on the modification is evaluated. Starch replacement with SA is confirmed by Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy. The degree of substitution in the resulting succinylated starches is determined by volumetric analysis, presenting high values (0.5–0.9). These materials act as superabsorbent gels, sensitive to changes in pH and ionic strength, and mostly with anti-polyelectrolytic behavior. MB dye has a higher affinity for succinylated starches than the MO dye. The removal capacity of MB is also influenced by the pH and the ionic strength of the solution. The kinetics and adsorption isotherms are satisfactorily adjusted to the pseudo-second order and Freundlich models, respectively. The esters functionalities of the starch prove to be reusable adsorbents, completing successfully five cycles of adsorption-desorption.This research was funded by MINECO, Project MAT2016-78437-R, the Agencia Estatal de Investigación (AEI, Spain), and Fondo Europeo de Desarrollo Regional (FEDER, EU) and the Universidad del Zulia, CONDES-LUZ.Peer reviewedJohn Wiley & SonsMinisterio de Economía y Competitividad (España)European CommissionUniversidad del ZuliaFernández-García, Marta [0000-0003-2061-0351]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/223721reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-78437-Rhttps://doi.org/10.1002/star.202000043Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2237212026-05-22T06:33:51Z
dc.title.none.fl_str_mv Succinylated Starches for Dye Removal
title Succinylated Starches for Dye Removal
spellingShingle Succinylated Starches for Dye Removal
Soto, Diana
Dyes
Oxidation
Removal
Succinylated starches
title_short Succinylated Starches for Dye Removal
title_full Succinylated Starches for Dye Removal
title_fullStr Succinylated Starches for Dye Removal
title_full_unstemmed Succinylated Starches for Dye Removal
title_sort Succinylated Starches for Dye Removal
dc.creator.none.fl_str_mv Soto, Diana
León, Orietta
Muñoz-Bonilla, Alexandra
Fernández-García, Marta
author Soto, Diana
author_facet Soto, Diana
León, Orietta
Muñoz-Bonilla, Alexandra
Fernández-García, Marta
author_role author
author2 León, Orietta
Muñoz-Bonilla, Alexandra
Fernández-García, Marta
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
European Commission
Universidad del Zulia
Fernández-García, Marta [0000-0003-2061-0351]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Dyes
Oxidation
Removal
Succinylated starches
topic Dyes
Oxidation
Removal
Succinylated starches
description Succinylated bitter cassava starches are evaluated for the removal of cationic, methylene blue (MB) and anionic, methyl orange (MO) dyes present in water. The native starch (NS) extracted from bitter cassava by the dry method, is modified using succinic anhydride (SA) as esterifying agent and sodium hydroxide, sodium carbonate, sodium sulfate, and sodium chloride as non-toxic and environmentally friendly catalysts. The effect of the type and concentration of catalyst on the modification is evaluated. Starch replacement with SA is confirmed by Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy. The degree of substitution in the resulting succinylated starches is determined by volumetric analysis, presenting high values (0.5–0.9). These materials act as superabsorbent gels, sensitive to changes in pH and ionic strength, and mostly with anti-polyelectrolytic behavior. MB dye has a higher affinity for succinylated starches than the MO dye. The removal capacity of MB is also influenced by the pH and the ionic strength of the solution. The kinetics and adsorption isotherms are satisfactorily adjusted to the pseudo-second order and Freundlich models, respectively. The esters functionalities of the starch prove to be reusable adsorbents, completing successfully five cycles of adsorption-desorption.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/223721
url http://hdl.handle.net/10261/223721
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-78437-R
https://doi.org/10.1002/star.202000043
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv John Wiley & Sons
publisher.none.fl_str_mv John Wiley & Sons
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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