Degradation of disperse blue 79 in anaerobic sediment-water systems

Conference · Thu Sep 01 04:00:00 EDT 1988 · Preprints of Papers Presented at National Meeting, Division of Water, Air and Waste Chemistry, American Chemical Society; (USA)

OSTI ID:7267186

Weber, E J ^[1]

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1. 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--
• Conference Information: Journal Name: Preprints of Papers Presented at National Meeting, Division of Water, Air and Waste Chemistry, American Chemical Society; (USA) Journal Volume: 28:2
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ANAEROBIC CONDITIONS
AZO COMPOUNDS
AZO DYES
CHEMICAL REACTIONS
DECOMPOSITION
DYES
FRESH WATER
HYDROGEN COMPOUNDS
MATERIALS
MUTAGENS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
SEDIMENTS
TOXIC MATERIALS
WATER