Cathodic Decolourisation of Dyes in Concentrates from Nanofiltration and Printing Pastes

Bechtold, T.; Turcanu, A.
September 2004
Journal of Applied Electrochemistry;Sep2004, Vol. 34 Issue 9, p903
Academic Journal
Direct cathodic reduction of dyes which contain an azo-goup in the chromophore was successfully used for decolourisation of intensively coloured concentrates from Nanofiltration treatment of textile effluents. Based on laboratory scale experiments, a technical multi-cathode electrolyser was applied for full scale decolourisation experiments at cell currents from 40 to 80 A. The absorbance of the treated wastes decreased from 60 to 80% of the initial value at an energy consumption of 2–8 kWh m-3. Experiments with addition of redox mediator indicate a significant increase in decolourisation rate; however chemical consumption is increased for 0.5–1.5 kg m-3 of waste. The decolourisation of reactive dye containing printing pastes was also achieved at the laboratory scale, where decolourisation of 60–80% was achieved.


Related Articles

  • New Ideas for Digital Textile Printing Expand Technological Possibilities.  // Textile World;Nov2002, Vol. 152 Issue 11, p15 

    Focuses on the technological expansion of digital textile printing. Use of pigment dyes in printing; Evaluation of pre and post treatments for dye fixation; Availability of jewel tones and darker colors.

  • Developments in dyeing and printing.  // Colourage;May97, Vol. 44 Issue 5, p33 

    Discusses the abstract of the article "Developments in dyeing and printing," by T. Petterson, which appeared in a 1996 issue of "Australian Textile".

  • Flash ageing - cost-saving concept for fixing in dyeing and printing.  // Colourage;Jul98, Vol. 45 Issue 7, p36 

    Discusses the abstract of an article about flash ageing, a cost-saving concept for fixing in dyeing and printing.

  • Alkaline discharge-resist printing of disperse dyes.  // Colourage;Mar1999, Vol. 46 Issue 3, p37 

    Discusses the abstract of the research paper "Alkaline Discharge-Resist Printing of Disperse Dyes," by Peng Taozhi et al and published in a 1998 issue of "Journal of the Suzhou Institute of Silk Textile Technology".

  • Aggregation of direct dyes.  // Colourage;Oct97, Vol. 44 Issue 10, p44 

    Presents the abstract of the paper "Aggregation of Direct Dyes," published in the 1996 edition of the "IFATCC Congress Book of Papers".

  • Dyeing; printing; finishing.  // Colourage;Sep99, Vol. 46 Issue 9, p46 

    Presents the abstract of the paper "Process for trichromatric dyeing or printing," by J.-M. Adam and F. Casi published in the July 12, 1996 patent application in Switzerland.

  • Dyeing; printing; finishing.  // Colourage;Sep99, Vol. 46 Issue 9, p47 

    Presents the abstract of the paper "Process for dichromatic or frichromatic dyeing or printing," by U. Lehmann, M. Frick, et al published in the November 23, 1995 patent application in Switzerland.

  • Dyes, Printing, Finishing.  // Colourage;Apr98, Vol. 45 Issue 4, p32 

    Presents the abstract of the paper "Reactive dye printing with a new synthetic thickener," by R.A. Poletti, P.R. Panchmatia, et al published in the March 1997 issue of the periodical "Colorist,".

  • Dyeing; printing; finishing.  // Colourage;Jun95, Vol. 42 Issue 6, p32 

    Presents abstracts on technical papers dealing with dyeing, printing, and finishing.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics