Registration Dossier

Environmental fate & pathways

Adsorption / desorption

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Administrative data

Endpoint:
adsorption / desorption
Remarks:
other: Kd
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
The partition coefficient for Iron reported in this study is based on a literature survey. Hypothesis for read across: The structure of iron ore pellets consists essentially of iron oxide grains. The bonding of the grains occur by oxide bridging, recrystallisation of hematite and to a lesser extent by the formation of fused silicate phases. Since silicates are inert and no effect on the environment is expected, the endpoints in Chapters 5 and 6 are based on the effects of iron as a worst case in these substances. More information on the justification of read across can be found in the attached document in the endpoint summaries of section 5 and 6.
Cross-reference
Reason / purpose:
reference to other study

Data source

Reference
Reference Type:
publication
Title:
Can the unit world model concept be applied to hazard assessment of both organic chemicals and metal ions?
Author:
Harvey C, Mackay, D, Webster E
Year:
2007
Bibliographic source:
Environmental Toxicology and Chemistry, Vol 26(10), pp 2129-2142

Materials and methods

Principles of method if other than guideline:
secondary source, not sure if guideline is used
GLP compliance:
not specified
Type of method:
other: no data
Media:
soil

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Iron

Study design

Test temperature:
no data

HPLC method

Details on study design: HPLC method:
no data

Batch equilibrium or other method

Analytical monitoring:
not specified
Details on sampling:
no data
Details on matrix:
no data
Details on test conditions:
no data

Results and discussion

Adsorption coefficient
Type:
Kd
Remarks:
log for soil
Value:
ca. 2.7
Remarks on result:
other: mean log Kd is 2.736

Any other information on results incl. tables

Mean log Kd of 2.736 is derived from AECL report1990 with log Kd of 2.519; 3.079; 2.394; 2.954 for respectively sand; silt; clay and organic soils.

Applicant's summary and conclusion

Conclusions:
Mean log Kd for soil is 2.736.