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https://locus.ufv.br//handle/123456789/21494
Tipo: | Artigo |
Título: | Thermodynamics and optimization of norbixin transfer processes in aqueous biphasic systems formed by polymers and organic salts |
Autor(es): | Mageste, Aparecida Barbosa Senra, Tonimar Domiciano Arrighi Silva, M. Carmo Hespanhol da Bonomo, Renata Cristina Ferreira Silva, Luis Henrique Mendes da |
Abstract: | Partitioning 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. |
Palavras-chave: | Aqueous two-phase systems Norbixin Purification Partition Green chemistry |
Editor: | Separation and Purification Technology |
Tipo de Acesso: | Elsevier B.V. |
URI: | https://doi.org/10.1016/j.seppur.2012.06.012 http://www.locus.ufv.br/handle/123456789/21494 |
Data do documento: | 19-Set-2012 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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artigo.pdf Until 2100-12-31 | texto completo | 847,75 kB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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