Degradation of disperse blue 79 in anaerobic sediment-water systems
- Environmental Protection Agency, Athens, GA (USA)
In recent years, concern over the environmental fate of the disperse azo dyes in natural water systems has grown. This concern arises from the fact that these dyes are very hydrophobic compounds, suggesting that they will partition strongly to bottom sediments where reductive cleavage of the azo linkage may occur. This transformation process could result in the release of potentially hazardous aromatic amines into the water column. Earlier studies in this laboratory demonstrated that the reductive cleavage of simple substituted azobenzenes in anaerobic sediment-water systems is a facile process. To determine whether reductive transformation of disperse azo dyes in natural water systems is an important environmental process, the fate of disperse Blue 79 in anaerobic sediment-water systems was studied. Disperse Blue 79 was selected for study for several reasons. It is by far the largest volume dye on the market today; the average annual production in the US from 1983 to 1985 was approximately 3.2 million kilograms. Furthermore, the reductive cleavage of the azo linkage of Disperse Blue 79 results in the formation of 2-bromo-4,6-dinitroaniline (BDNA), which has been shown to be both toxic and mutagenic. Recently, the Interagency Testing Committee, a Federal body established under the Toxic Substances Control Act, selected Disperse Blue 79 as a compound needing study with respect to its environmental fate and impact.
- OSTI ID:
- 7267186
- Report Number(s):
- CONF-8909234-; CODEN: ACWCA
- Journal Information:
- Preprints of Papers Presented at National Meeting, Division of Water, Air and Waste Chemistry, American Chemical Society; (USA), Vol. 28:2; Conference: Advisory group meeting on nuclear data for radiation damage assessment and related safety aspects, Vienna (Austria), 19-22 Sep 1989; ISSN 0099-7293
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AZO DYES
DECOMPOSITION
ANAEROBIC CONDITIONS
FRESH WATER
MUTAGENS
SEDIMENTS
TOXIC MATERIALS
AZO COMPOUNDS
CHEMICAL REACTIONS
DYES
HYDROGEN COMPOUNDS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)