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EC number: 203-581-0 | CAS number: 108-42-9
Biodegradation in water and sediment: simulation tests
Administrative data
- Endpoint:
- biodegradation in water: sediment simulation testing
- Type of information:
- experimental study
- Adequacy of study:
- other information
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Relaible source.
Data source
Reference
- Reference Type:
- publication
- Title:
- REDUCTIVE DEHALOGENATION OF CHLOROANILINES INANAEROBIC ESTUARINE SEDIMENT
- Author:
- Susarla, S. et al.
- Year:
- 1 996
- Bibliographic source:
- Environmental Technology, Vol. 18 pp 75 - 83 (1997)
Materials and methods
- GLP compliance:
- not specified
Test material
- Reference substance name:
- 3-chloroaniline
- EC Number:
- 203-581-0
- EC Name:
- 3-chloroaniline
- Cas Number:
- 108-42-9
- Molecular formula:
- C6H6ClN
- IUPAC Name:
- 3-chloroaniline
- Test material form:
- other: liquid
- Details on test material:
- - Purity not reported
- Empirical formula: C6H6ClN
- Molecular mass: 127.58 g/mole
Constituent 1
Study design
- Oxygen conditions:
- anaerobic
- Inoculum or test system:
- natural water / sediment
- Details on source and properties of sediment:
- The sediment used in the experiment was collected at the mouth of Tsurumi River, Japan. The surface sediment sample was collected by an Ekman-Barge sediment sampler from the Tsurumi-Ohashi bridge in September, 1992. The sediment was black in color indicating sulfate reductng activity, however, macro benthic organisrns, such as crabs, small fish and shellfish were present in the collected sediment.
- Duration of test (contact time):
- 672 d
Initial test substance concentration
- Initial conc.:
- 255 mg/L
- Based on:
- test mat.
- Details on study design:
- The sediment was sieved through a 2 mm screen to remove debris. The sodium chloride (NaCl) and sulfate concentrations in sediment interstitial water were 1.7 % and 1980 mg/L, respectively, while nitrate was below the detection Iimit. River water (24 °C) was also collected just above the sampling point The NaCl, sulfate and nitrate concentrations were 1.5 %, 1840 mg/L and 4 mg/L , respectively. The oxygen concentration of the river water
was approximately 7 mg/L. The sieved sediment sample was mixed with river water to make sediment slurry with a solids concentration of 272 ± 2.8 g/Kg. This was an average of four replicate measurements. The pH of the sediment slurry was 5.6.
Results and discussion
Half-life of parent compound / 50% disappearance time (DT50)
- Compartment:
- sediment
- DT50:
- 672 d
- Type:
- (pseudo-)first order (= half-life)
- Temp.:
- 25 °C
- Remarks on result:
- other: r2 = 0.76
Applicant's summary and conclusion
Validity criteria
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The first-order rate constant of 3-chloroaniline degradation in sediment was determined at t½ of 672 days.
- Executive summary:
The first-order rate constant of 3-chloroaniline degradation in sediment was determined at t½ of 672 days.
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