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OLS Field Name OLS Field Data
Main Title Fate of Water Soluble Azo Dyes in the Activated Sludge Process.
Author Shaul, G. M. ; Dempsey, C. R. ; Dostal, K. A. ; Holdsworth, T. J. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-91/194;
Stock Number PB91-240507
Additional Subjects Azo dyes ; Sulfonic acids ; Activated sludge process ; Separation ; Adsorption ; Biodeterioration ; Carcinogens ; Effluents ; Reprints ; Mass balance calculations
Library Call Number Additional Info Location Last
NTIS  PB91-240507 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 11/26/1991
Collation 15p
Abstract The objective of the study was to determine the partitioning of water soluble azo dyes in the activated sludge process (ASP). Azo dyes are of concern because some of the dyes, dye precursors, and/or their degradation products such as aromatic amines (which are also dye precursors) have been shown to be, or are suspected to be, carcinogenic. Specific azo dyes were spiked at 1 and 5 mg/L to pilot-scale treatment systems with both liquid and sludge samples collected. Samples were analyzed by high performance liquid chromatography (HPLC) with an ultraviolet-visible detector. Mass balance calculations were made to determine the amount of the dye compound in the waste activated sludge (WAS) and in the activated sludge effluent (ASE). Of the 18 dyes studied, 11 compounds were found to pass through the ASP substantially untreated, 4 were significantly adsorbed onto the WAS, and 3 were apparently biodegraded.
Supplementary Notes Pub. in Chemosphere, v22 n1-2 p107-119 1991. See also PB88-208251.
NTIS Title Notes Journal article.
Title Annotations Reprint: Fate of Water Soluble Azo Dyes in the Activated Sludge Process.
Category Codes 68C; 68D
NTIS Prices PC A03/MF A01
Primary Description 600/14
Document Type NT
Cataloging Source NTIS/MT
Control Number 131119797
Origin NTIS
Type CAT