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Environmental fate & pathways

Biodegradation in soil

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
biodegradation in soil: simulation testing
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline followed
Principles of method if other than guideline:
Degradation test in soil
GLP compliance:
not specified
Test type:
laboratory
Radiolabelling:
no
Oxygen conditions:
aerobic
Details on soil characteristics:
Soil: regular, slightly eroded, average-humus, lightly grained chernozem on hard carbonaceous woody loam (humus content: 5.05-5.09%, hydrolyzed nitrogen: 6.8, mobile phosphorus: 1.0, mobile calcium: 349 mg/kg soil, pH of the aqueous soil extraction: 7.1-7.5)
Duration:
24 h
Initial conc.:
500 mg/kg soil d.w.
Based on:
test mat.
Parameter followed for biodegradation estimation:
test mat. analysis
Temp.:
19°C
Humidity:
30%
Temp.:
5°C
Humidity:
30%
Details on experimental conditions:
Experiments conducted in glass vessels with 2 kg soil at a temperature of 19 +/-2°C and 5 +/- 2°C.
Initial substance concentration: 500 mg/kg soil; test substance applied in ether solution on the surface of a thin layer of soil.
Soil moisture was maintained constantly at a level of 30% from absolutely dry soil.
Soil No.:
#1
% Degr.:
100
Parameter:
not specified
Sampling time:
1 d
Remarks on result:
other: not reported
Transformation products:
not measured
Evaporation of parent compound:
not measured
Volatile metabolites:
not measured
Residues:
not measured
Details on results:
Hydroquinone applied at a concentration of 500 mg/kg was degraded within 1 day. One transformation product was detected (substance not specified). The authors classified hydroquinone as a substance which is comparatively slow in destruction, and which does not form stable transformation products in the soil.
Decrease of temperature to 5°C increased the duration of destruction by 3-4 times.
Conclusions:
Hydroquinone was degraded in soil within 1 day under the applied conditions. However, only primary degradation was determined. The detection of a transformation product (which was not identified) indicates that within 1 day mainly primary degradation occurs.

Description of key information

Hydroquinone was degraded in soil within 1 day under laboratory conditions. However, only primary degradation was determined. The detection of a transformation product (which was not identified) indicates that within 1 day mainly primary degradation occurs.
Due to the ready biodegradability observed in the screening tests (5.2.1), hydroquinone is expected to be rapidly biodegraded in soils.

Key value for chemical safety assessment

Additional information