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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:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Acceptable, well documented publication which meets basic scientific principles. Comparable to OECD guideline studies for readily biodegradability.

Data source

Reference
Reference Type:
publication
Title:
Brine shrimp bioassay and seawater BOD of petrochemicals
Author:
Price KS, Waggy GT, Conway RA
Year:
1974
Bibliographic source:
J Water Pollut Control Fed 46: 63-77

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Acetic acid, no further details on test substance characteristics are given.

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Details on inoculum:
- A settled domestic waste water was filtered through glass wool and then added (3 ml/bottle) as seed material to clean the bottle.
Duration of test (contact time):
20 d
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption

Results and discussion

% Degradation
Parameter:
% degradation (O2 consumption)
Value:
96
Sampling time:
20 d
Details on results:
Kinetic of test substance (in %):
= 76 after 5 day(s)
= 82 after 10 day(s)
= 85 after 15 day(s)
= 96 after 20 day(s)

Applicant's summary and conclusion

Interpretation of results:
readily biodegradable