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Environmental fate & pathways

Adsorption / desorption

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Reference
Endpoint:
adsorption / desorption: screening
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
OECD Guideline 106 (Adsorption - Desorption Using a Batch Equilibrium Method)
GLP compliance:
yes
Type of method:
batch equilibrium method
Media:
soil
Radiolabelling:
not specified
Test temperature:
25℃
Analytical monitoring:
not required
Details on matrix:
Soil types:
Somersham sandy loam, Sandiacre clay loam and Alconbury clay
Sample No.:
#1
Type:
Koc
Value:
126 dimensionless
Temp.:
25 °C
Matrix:
Somersham sandy loam
% Org. carbon:
1.32
Sample No.:
#2
Type:
Koc
Value:
2 053 dimensionless
Temp.:
25 °C
Matrix:
Sandiacre clay loam
% Org. carbon:
3.73
Sample No.:
#3
Type:
Koc
Value:
252 dimensionless
Temp.:
25 °C
Matrix:
Alconbury clay
% Org. carbon:
1.65
Transformation products:
no

Adsorption kinetics: 96.2 % was absorbed within 2 hours

Adsorption isotherms: 126 to 2053 (Freundlich adsorption constants)

Adsorptions coefficient: 126 to 2053 (Freundlich adsorptionconstants).

Mass balance: Recovery 95 - 107 %

Validity criteria fulfilled:
yes
Conclusions:
ODB-2 was strongly adsorbed to all three soils tested. Based on the results obtained ODB-2 can be classified as having a low potential for motility in soil.

Description of key information

ODB-2 was strongly adsorbed to all three soils tested. Based on the results obtained ODB-2 can be classified as having a low potential for motility in soil.

Key value for chemical safety assessment

Koc at 20 °C:
2 053

Additional information