Thermodynamics and optimization of norbixin transfer processes in aqueous biphasic systems formed by polymers and organic salts

dc.creatorMageste, Aparecida Barbosa
dc.creatorSenra, Tonimar Domiciano Arrighi
dc.creatorSilva, M. Carmo Hespanhol da
dc.creatorBonomo, Renata Cristina Ferreira
dc.creatorSilva, Luis Henrique Mendes da
dc.date2018-08-29T11:03:49Z
dc.date2018-08-29T11:03:49Z
dc.date2012-09-19
dc.date.accessioned2023-09-27T20:51:24Z
dc.date.available2023-09-27T20:51:24Z
dc.identifier13835866
dc.identifierhttps://doi.org/10.1016/j.seppur.2012.06.012
dc.identifierhttp://www.locus.ufv.br/handle/123456789/21494
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8949501
dc.descriptionPartitioning of the natural dye norbixin has been studied in aqueous two-phase system (ATPS) that are formed by mixing aqueous solutions of a polymer (or copolymer) and an organic salt (sodium tartrate or succinate). In this work, the norbixin partition coefficient (KN) was optimized, taking into account the variables of polymer concentration, salt concentration and pH. It was found that KN is highly dependent on the electrolyte nature, system hydrophobicity and TLL values. Testing produced KN values between 8 and 130, indicating the great potential of ATPS as a method for norbixin pre-concentration/purification. Thermodynamic transfer parameters (ΔtrG, ΔtrH, ΔtrS) indicate that the preferential concentration of norbixin in the top phase is favored by enthalpic and entropic contributions.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherSeparation and Purification Technology
dc.relationv. 98, p. 69- 77, set. 2012
dc.rightsElsevier B.V.
dc.subjectAqueous two-phase systems
dc.subjectNorbixin
dc.subjectPurification
dc.subjectPartition
dc.subjectGreen chemistry
dc.titleThermodynamics and optimization of norbixin transfer processes in aqueous biphasic systems formed by polymers and organic salts
dc.typeArtigo


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