Skip to main content

Reuse of the water and salt of reactive dyeing effluent after electrochemical decolorisation

Buy Article:

$51.00 plus tax (Refund Policy)

In the dyeing of cellulose with reactive dyes, the addition of a high amount of electrolyte is required [50–80 g/l of sodium chloride (NaCl) or sodium sulphate (Na2SO4)]. The main goal of this work is the reuse of salt and water from exhausted dyebaths and washing effluents, which have been previously decolorised by means of an electrochemical treatment. Dyeings with three bifunctional reactive dyes (Navy Blue, Crimson and Yellow Procion H‐EXL) were carried out individually and in a trichromatic mixture. The reuse of the discoloured exhausted dyebath provided excellent red and yellow dyeings. Colour differences close to the quality control limit (ΔE CMC(2:1) ≤ 1) were obtained in the blue and trichromatic dyeings. An average recovery of 70% of water and 60% of salt was achieved with the reuse process. High‐quality dyeings were also obtained with the discoloured first‐washing bath. In this case, 15% of salt and almost 100% of water were recycled.
No References
No Citations
No Supplementary Data
No Data/Media
No Metrics

Document Type: Research Article

Affiliations: 1: Department of Projects Engineering, ETSEIAT, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain 2: INTEXTER, Institute of Textile Research, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain

Publication date: 2012-02-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more