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Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: screening tests
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1992
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Guideline study with minor restrictions

Data source

Reference
Reference Type:
publication
Title:
No information
Year:
1978
Bibliographic source:
Reichhold Chemicals Inc., Studies submitted under section 8 (d) of the TSCA, U. S. EPA 8 DHQ-0878–0007, 1978

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 302 C (Inherent Biodegradability: Modified MITI Test (II))
GLP compliance:
no

Test material

Constituent 1
Reference substance name:
phenyl glycidyl ether
IUPAC Name:
phenyl glycidyl ether

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
mixture of sewage, soil and natural water
Details on inoculum:
- In March, June, September, and December, sludge was sampled at the following ten places in Japan:
1. Fukogawa city sewage plant,
2. Fukashiba industry sewage plant,
3. Nakahama city sewage plant,
4. Ochiai city sewage plant,
5. Kitakami river,
6. Shinano river,
7. Yoshino river,
8. Lake Biwa,
9. Hiroshima bay,
10. Dookai bay;

- Sampling performance:
1. City sewage: Returned sludge from sewage plants was taken.
2. Rivers, lake and sea: Surface water and surface soil which were in contact with atmosphere were collected

- Concentration of sludge: 100 mg/L
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
30 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption
Reference substance
Reference substance:
aniline

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (O2 consumption)
Value:
> 32 - < 62
Sampling time:
28 d
Parameter:
% degradation (TOC removal)
Value:
> 20 - < 60
Sampling time:
28 d
Parameter:
% degradation (test mat. analysis)
Value:
> 97 - < 98
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
Te test substance was not readily biodegradable.