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- Title
Dyeing of Cotton Fabric with Reactive Dyes Using Ozonated, Spent Dyebath Water.
- Authors
Chen Keqiang; Perkins, Warren S.; Reed, Ida E.
- Abstract
A dyebath reuse study using reactive dyes was completed. Dyeings were done with blue, red and yellow dyes and a dye mixture containing equal amounts of each of the three dyes. The spent dyebath water from these four dyeings was mixed, filtered and ozonated. The four shades were dyed again in baths containing 90% ozonated water and 10% fresh tap water. Only 10% of the amount of salt used in the original dyeing was required for the dyeings in recycled water since the salt in the 90% recycled water was still present. The experiment was repeated through five reuse cycles. Color reproducibility of dyeings done in the recycled water was excellent, closely matching the color attained using fresh tap water as the dyeing medium. The pH of the spent dyebath water decreased upon ozonation. Although the pH decrease was about the same in each new cycle, the amounts of caustic soda needed to adjust back to the original dyebath pH value increased with each cycle. This shows that ozonation of spent dyebath water produces substances which tend to buffer the solution.
- Subjects
OZONIZATION; SPECTROPHOTOMETERS; DYES &; dyeing; REACTIVE dyes; WASTE recycling; DRINKING water; COTTON textiles; TEXTILE industry
- Publication
Textile Chemist & Colorist, 1994, Vol 26, Issue 4, p25
- ISSN
0040-490X
- Publication type
Article