Registration Dossier

Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Administrative data

Endpoint:
biodegradation in water and sediment: simulation tests
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
review article or handbook
Title:
Reaxys ID : 742030
Year:
2011
Bibliographic source:
Reaxys by Elsevier Properties SA;Susarla, Sridhar; Yonezawa, Yoshitaka; Masunaga, Shigeki; Water Research; vol. 32; nb. 3; (1998); p. 639 - 648

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other:
Principles of method if other than guideline:
Sulfate-reducing sediment samples were collected at the mouth of Tsurumi River, Japan, in 1992; in screw-top test-tubes;
GC/MS analysis was done for these samples
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material: 4-fluoroaniline
- Molecular formula: C6H6FN
- Molecular weight: 111.12
- Substance type: Organic
- Physical state: Liquid
Radiolabelling:
not specified

Study design

Oxygen conditions:
anaerobic
Inoculum or test system:
other: estuarine sediment slurry
Details on source and properties of sediment:
Sulfate-reducing sediment samples were collected at the mouth of Tsurumi River, Japan, in 1992; in screw-top test-tubes;
Duration of test (contact time):
211 d
Parameter followed for biodegradation estimation:
test mat. analysis
Reference substance
Reference substance:
not specified

Results and discussion

% Degradation
% Degr.:
50
Parameter:
test mat. analysis
Sampling time:
211 d
Remarks on result:
other: Other details not available
Half-life of parent compound / 50% disappearance time (DT50)
Compartment:
sediment
DT50:
211 d
Type:
other: First-order reaction
Remarks on result:
other: Other details not available
Other kinetic parameters:
first order rate constant
Transformation products:
not specified

Applicant's summary and conclusion

Conclusions:
The half-life of 4-fluoroaniline in an estuarine sediment slurry in anaerobic conditions is 211 days.
The first-order reaction rate constant is k=0.0033 day-1
Executive summary:

The half-life (50% degradation) of 4-fluoroaniline in an estuarine sediment slurry in anaerobic conditions is 211 days. The first-order reaction rate constant is k=0.0033 day-1. This indicates that this substance is slowly biodegradable in sediment.