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Environmental fate & pathways

Biodegradation in soil

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Administrative data

Endpoint:
biodegradation in soil: simulation testing
Type of information:
experimental study
Adequacy of study:
key study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report date:
2016

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 307 (Aerobic and Anaerobic Transformation in Soil)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 835.4100 (Aerobic Soil Metabolism)
Deviations:
no
Test type:
field trial

Test material

Constituent 1
Radiolabelling:
yes

Study design

Oxygen conditions:
aerobic
Soil classification:
USDA (US Department of Agriculture)
Year:
2014
Soil propertiesopen allclose all
Soil no.:
#1
Soil type:
loamy sand
% Clay:
9
% Silt:
8
% Sand:
83
% Org. C:
0.9
pH:
5.1
CEC:
10.2 meq/100 g soil d.w.
Bulk density (g/cm³):
1.15
Soil no.:
#2
Soil type:
loam
% Clay:
27
% Silt:
28
% Sand:
45
% Org. C:
3.8
pH:
4.9
CEC:
20.9 meq/100 g soil d.w.
Bulk density (g/cm³):
0.96
Soil no.:
#3
Soil type:
sandy loam
% Clay:
19
% Silt:
14
% Sand:
67
% Org. C:
1.9
pH:
6.5
CEC:
15.9 meq/100 g soil d.w.
Bulk density (g/cm³):
0.98
Soil no.:
#4
Soil type:
loamy sand
% Clay:
9
% Silt:
12
% Sand:
79
% Org. C:
0.7
pH:
6.2
CEC:
8.9 meq/100 g soil d.w.
Bulk density (g/cm³):
1.3
Duration of test (contact time)open allclose all
Soil No.:
#1
Duration:
121 d
Soil No.:
#2
Duration:
121 d
Soil No.:
#3
Duration:
121 d
Soil No.:
#4
Duration:
121 d
Initial test substance concentrationopen allclose all
Soil No.:
#1
Initial conc.:
4.48 mg/kg soil d.w.
Based on:
test mat.
Soil No.:
#2
Initial conc.:
4.48 mg/kg soil d.w.
Based on:
test mat.
Soil No.:
#3
Initial conc.:
4.48 mg/kg soil d.w.
Based on:
test mat.
Soil No.:
#4
Initial conc.:
4.48 mg/kg soil d.w.
Based on:
test mat.
Experimental conditionsopen allclose all

Results and discussion

Material (mass) balanceopen allclose all
Soil No.:
#1
% Recovery:
97.5
Remarks on result:
other:
Soil No.:
#1
% Recovery:
96
Remarks on result:
other:
Soil No.:
#2
% Recovery:
97
Remarks on result:
other:
Soil No.:
#3
% Recovery:
92.8
Remarks on result:
other:
Soil No.:
#4
% Recovery:
94.7
Remarks on result:
other:
Half-life / dissipation time of parent compoundopen allclose all
Key result
Soil No.:
#1
DT50:
141 d
Type:
(pseudo-)first order (= half-life)
Temp.:
12 °C
Remarks on result:
other:
Key result
Soil No.:
#2
DT50:
82 d
Type:
(pseudo-)first order (= half-life)
Temp.:
12 °C
Remarks on result:
other:
Key result
Soil No.:
#3
DT50:
16.7 d
Type:
(pseudo-)first order (= half-life)
Temp.:
12 °C
Remarks on result:
other:
Key result
Soil No.:
#4
DT50:
54.2 d
Type:
(pseudo-)first order (= half-life)
Temp.:
12 °C
Remarks on result:
other:
Soil No.:
#1
DT50:
165 d
Type:
(pseudo-)first order (= half-life)
Temp.:
> 8 - < 12 °C
Remarks on result:
other:
Soil No.:
#1
DT50:
65.5 d
Type:
(pseudo-)first order (= half-life)
Temp.:
> 18 - < 22 °C
Remarks on result:
other:
Soil No.:
#2
DT50:
43.1 d
Type:
(pseudo-)first order (= half-life)
Temp.:
> 18 - < 22 °C
Remarks on result:
other:
Soil No.:
#3
DT50:
8.8 d
Type:
(pseudo-)first order (= half-life)
Temp.:
> 18 - < 22 °C
Remarks on result:
other:
Soil No.:
#4
DT50:
28.6 d
Type:
(pseudo-)first order (= half-life)
Temp.:
> 18 - < 22 °C
Remarks on result:
other:

Applicant's summary and conclusion