Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/28501
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dc.contributor.authorBento, Rui M. F.pt_PT
dc.contributor.authorAlmeida, Mafalda R.pt_PT
dc.contributor.authorBharmoria, Pankajpt_PT
dc.contributor.authorFreire, Mara G.pt_PT
dc.contributor.authorTavares, Ana P. M.pt_PT
dc.date.accessioned2020-05-13T15:39:07Z-
dc.date.issued2019-03-18-
dc.identifier.issn1383-5866pt_PT
dc.identifier.urihttp://hdl.handle.net/10773/28501-
dc.description.abstractThe intensive use of water containing dyes by the textile industry, and consequently the contamination of soils and water, represents serious environmental concerns. Amongst the several processes applied in the treatment of textile effluents, biological-based processes, if designed to be cost-effective and ecofriendly, are promising alternatives to decolorize textile effluents. In this work we investigate and propose the novel use of ionic liquids (ILs) with surfactant characteristics to improve the degradation of the largely used and highly hydrophobic textile dye indigo carmine (IC) by laccase. An initial screening on the activity of laccase in aqueous solutions of twelve surfactant-based ILs from three different families, namely tetraalkylammonium- and imidazolium-based cationic surfactants and cholinium-based anionic surfactants, at different concentrations, was carried out. Significant improvements in the activity of laccase were observed with decyltrimethylammonium bromide, [N10111]Br, and 1-decyl-3-methylimidazolium chloride, [C10mim]Cl, at 75 mM (above the critical micellar concentration of each IL). These ILs were then investigated in aqueous solutions to simultaneously encapsulate laccase and IC for the in situ enzymatic biodegradation of the dye. The use of ILs remarkably increases the degradation rate of the dye and decolorization efficiency; a degradation efficiency of IC of 82% is attained in 0.5 h using aqueous solutions of [N10111]Br, whereas without IL only 6% of IC is degraded. Furthermore, 93% of the dye decolorization was achieved with [N10111]Br. The overall gathered results show that it is possible to significantly improve the degradation of hydrophobic dyes by enzymes using appropriate surfactant-based ILs, while foreseeing the use of the treated water by the same textile industries in new dyeing steps and thus contributing to a substantial decrease of the economic input and environmental footprint of these industries.pt_PT
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relationUID/CTM/50011/2019pt_PT
dc.relationPOCI-01-0145-FEER-031106pt_PT
dc.relationPOCI-01-0145-FEDER-031268pt_PT
dc.relationIF/01634/2015pt_PT
dc.rightsopenAccesspt_PT
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectEnzymatic activitypt_PT
dc.subjectIndigo carminept_PT
dc.subjectLaccasept_PT
dc.subjectSurfactant-based ionic liquidspt_PT
dc.subjectTextile aqueous effluentspt_PT
dc.titleImprovements in the enzymatic degradation of textile dyes using ionic-liquid-based surfactantspt_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.firstPage116191pt_PT
degois.publication.titleSeparation and Purification Technologypt_PT
degois.publication.volume235pt_PT
dc.date.embargo2021-03-18-
dc.identifier.doi10.1016/j.seppur.2019.116191pt_PT
dc.identifier.essn1873-3794pt_PT
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