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Removal of aromatic amines and decolourisation of azo dye baths by electrochemical treatment

López Grimau, Víctor ; Riera Torres, Miquel ; López Mesas, Montserrat ; Gutiérrez Bouzán, María Carmen

Coloration technology, 2013-08, Vol.129 (4), p.267-273 [Periódico revisado por pares]

Blackwell Publishing Ltd

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Título:
Removal of aromatic amines and decolourisation of azo dye baths by electrochemical treatment
Autor: López Grimau, Víctor ; Riera Torres, Miquel ; López Mesas, Montserrat ; Gutiérrez Bouzán, María Carmen
Assuntos: Aigües residuals ; Amines ; Anàlisi electroquímica ; Azo ; Color ; Color removal ; Colour ; Depuració ; Dyes ; Dyes and dyeing ; Effluents ; Electrochemical analysis ; Electroquímica ; Eliminació de compostos orgànics ; Enginyeria química ; Enginyeria tèxtil ; Fabricació tèxtil ; Indústries químiques ; Mathematical analysis ; Purification ; Química ; Química física ; Química tèxtil ; Sewage ; Tints i tenyit ; Tintura ; Waste disposal ; Àrees temàtiques de la UPC
É parte de: Coloration technology, 2013-08, Vol.129 (4), p.267-273
Notas: Spanish Ministry of Science and Innovation - No. CTM2010-18842-C02-01
ark:/67375/WNG-4PPJW04P-Q
istex:5544316DB0A7C4B5541D703934B732540EE48BEF
Area of Technological Transfer of Generalitat de Catalunya - No. CIDEM-ACC10; No. Valtec 09-2-0040
ArticleID:COTE12021
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: The presence of aromatic amines in effluent from dyeing processes of the textile industry is an added problem to the high coloration typical of this type of effluent. The main objective of the present work was to eliminate these two problems simultaneously by electrochemical treatment using bath solutions containing three azo dyes. For the analysis of amines, a liquid–liquid extraction method was developed as an easier and faster alternative to the method described in the standards and widely used in analytical laboratories. Four amines (aniline, o‐toluidine, 4‐chloroaniline and 4‐aminobiphenyl) were detected by GC‐MS in the residual azo dye baths. A total amine concentration of between 2.5 and 1 ppm was detected, 4‐aminobiphenyl being the main compound. Both residual colour and amines were removed by electrochemical treatment carried out at three current densities (3, 24 and 40 mA/cm2). At 24 mA/cm2, more than 90% of colour removal was achieved, and the total amine concentration was reduced to below 0.15 ppm.
Editor: Blackwell Publishing Ltd
Idioma: Inglês

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Removal of aromatic amines and decolourisation of azo dye baths by electrochemical treatment

López Grimau, Víctor ; Riera Torres, Miquel ; López Mesas, Montserrat ; Gutiérrez Bouzán, María Carmen

Blackwell Publishing Ltd

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