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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Published study sufficiently documented

Data source

Reference
Reference Type:
publication
Title:
Fate and biodegradability of sulfonated aromatic amines
Author:
N. Tan
Year:
2005
Bibliographic source:
Biodegradation (2005) 16: 527–537

Materials and methods

Test guideline
Qualifier:
no guideline followed

Test material

Constituent 1
Reference substance name:
4-ABS
IUPAC Name:
4-ABS

Study design

Oxygen conditions:
aerobic

Results and discussion

Applicant's summary and conclusion

Executive summary:

The test substance was tested for its aerobic and anaerobic biodegradability and toxicity potential in a variety of environmental inocula. The observed degradation of the test substance occurred only under aerobic conditions with inocula sources that were historically polluted with sulfonated aromatic amines. Bioreactor experiments, with non-sterile synthetic wastewater, confirmed the results from the aerobic batch degradation experiments. The test substance was degraded in long-term continuous experiment by a bioaugmented enrichment culture.

Evidence for extensive mineralization of the test substance was based on oxygen uptake and carbon dioxide production during the batch experiments and the high levels of chemical oxygen demand (COD) removal in the bioreactor. Furthermore, mineralization of the sulfonate group was demonstrated by high recovery of sulfate. The test substance did not show any toxic effects on the aerobic and anaerobic bacterial populations tested.