Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Study of the Photodegradation of Commercial Dyes.
Author Porte, John J. ;
CORP Author Clemson Univ., S.C. Dept. of Textiles.
Year Published 1973
Report Number EPA-12090-EOX; 11325,; R2-73-058
Stock Number PB-221 483
Additional Subjects ( Dyes ; Decomposition reactions) ; ( Photochemical reactions ; Dyes) ; ( Industrial wastes ; Dyes) ; ( Water pollttion ; Dyes) ; Reaction kinetics ; Textile industry ;
Library Call Number Additional Info Location Last
NTIS  PB-221 483 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 102p
The stability of thirty-six different commercial dyes in water to visible and ultraviolet light from a carbon arc has been studied. The dyes were selected on the basis of their importance in the textile industry from six major classes: basic, acid, direct, vat, disperse and sulfur dyes. A comparison is made for two of the dyes between laboratory fading rates and fading rates in natural sunlight. Both dyes degraded at least 10 times more rapidly in artificial light than in sunlight. Some previously identified degradation products of Basic Green 4 were confirmed, and a mechanism of their formation was proposed. A significant difference in degradaton rate was observed between water-soluble dyes and pigment dispersions. This study showed that most commercial colors are resistant to photodegradation and many weeks would be required to produce appreciable dye degradation in a natural aquatic environment. (Author)