Determination of the phthalocyanine textile dye, reactive turquoise blue, by electrochemical techniques

• Autor(a) principal: Osugi, Marly E. [UNESP]
• Data de Publicação: 2003
• Outros Autores: Carneiro, Patrícia A. [UNESP], Zanoni, Maria Valnice Boldrin [UNESP]
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0103-50532003000400025; http://hdl.handle.net/11449/67442
• topic: Electroanalysis; Reactive dyes; Reduction of phthalocyanines; Turquoise Blue 15; dye; phthalocyanine; tap water; alkalinity; aqueous solution; conference paper; ecotoxicology; effluent; electrochemistry; electrolysis; environmental impact; industrial waste; natural fiber production; potentiometry; reduction; textile; textile industry; waste water

Turquoise blue 15 (AT15) is a reactive dye widely used in the textile industry to color natural fibers. The presence of these dyes in effluent and industrial wastewater is of considerable interest due ecotoxicological and environmental problems. The electrochemical reduction of this dye has been investigated in aqueous solution using cyclic voltammetry, controlled potential electrolysis and cathodic stripping voltammetry. Optimum conditions for dye discoloration by controlled potential electrolysis use an alkaline medium. Using cathodic stripping voltammetry a linear calibration graph was obtained from 5.00×10-8 mol L-1 to 1.00×10 -6 mol L-1 of AT15 at pH 4.0, using accumulation times of 180 and 240 s and an accumulation potential of 0.0 V. The proposed method was applied in direct determination of the dye in tap water and in textile industry effluent.