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Title: Partition study of textile dye remazol yellow gold RNL in aqueous two-phase systems.
Authors: Alvarenga, Juliana Maria de
Fideles, Renata Aparecida
Silva, Maira Vieira da
Murari, Gabriella Frade
Taylor, Jason Guy
Lemos, Leandro Rodrigues de
Rodrigues, Guilherme Dias
Mageste, Aparecida Barbosa
Keywords: Aqueous two phase systems
Ionic liquids
Green chemistry
Issue Date: 2015
Citation: ALVARENGA, J. M. de et al. Partition study of textile dye remazol yellow gold RNL in aqueous two-phase systems. Fluid Phase Equilibria, v. 391, p. 1-8, 2015. Disponível em: <>. Acesso em: 16 jun. 2016.
Abstract: The removal of organic dye pollutants from wastewater produced by the textile industry is a complex problem that presents potential health risks to the general public. Remazol Yellow Gold RNL (YR) dye is readily used to dye cellulose base materials and the methods developed for its removal from aqueous systems are either inefficient or too expensive to be adopted by smaller textile manufactures. Our approach is based on aqueous two-phase system (ATPS) using salts and either polymers or ionic liquids to extract Remazol Yellow Gold RNL from wastewater. Parameters such as the nature of the electrolyte, molecular mass of polymer and tie line length (TLL) on the dye partition coefficient (KYR) were all evaluated. A phase diagram for the polyethylene glycol (PEG 4000 g mol_1) and magnesiumsulfate system at 298.15 Kwas obtained and used to study the partitioning of YR. The KYR values demonstrate the potential of both systems for the removal of dyes from industrial effluents. The partition mechanismwas discussed based on the Haynes model and using the of Gibbs standard energy change (DtrG_). The driving force (enthalpy and/or entropy) that governs the partitioning of the dye depends on the nature of the ATPS. The optimized conditions that gave the best system was successfully applied to the removal of YR from wastewater obtained from a local textile manufacturer. The high KYR values in the presence of the effluent demonstrate the potential and robustness of the ATPS for the treatment of effluents from textile industries.
ISSN: 0378-3812
metadata.dc.rights.license: O periódico Fluid Phase Equilibria concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3898810441772.
Appears in Collections:DEQUI - Artigos publicados em periódicos

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