Registration Dossier

Environmental fate & pathways

Additional information on environmental fate and behaviour

Currently viewing:

Administrative data

Endpoint:
additional information on environmental fate and behaviour
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Results were considered relevant for the EU environment in the EU risk assesment on zinc (ECB 2008)

Data source

Reference
Reference Type:
publication
Title:
Correlation of freundlich Kd and n retention parameters with soils and elements.
Author:
Buchter B, Davidaff B, Amacher C, Hinz C, Iskandar K and Selim HM.
Year:
1989
Bibliographic source:
Soil Science 148,:370-379

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Retention of the elements was studied using a batch equilibration method. Samples of soil were mixed with solution, shaken, filetered and amounts of each element retained by the spoil were calculated.
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Zinc nitrate
EC Number:
231-943-8
EC Name:
Zinc nitrate
Cas Number:
7779-88-6
Molecular formula:
HNO3.1/2Zn
IUPAC Name:
zinc dinitrate
Details on test material:
Soluble Zn(NO3)2.6H20 was added to the soils.Test results are expressed as "zinc"

Results and discussion

Any other information on results incl. tables

Solids-water partitioning coefficient of 158.5 l/kg (log value 2.2).

This value was determined. this value was used in the RA Zinc because it is based on the part of the metals that can actually exchange and is to be assumed in equilibrium with the water phase.Furthermore, experimental values were considered more reliable than field-based , in the RA.

Applicant's summary and conclusion

Conclusions:
Tests of good quality and considered useful for assessing the effect on the endpoint. Result used in the RA zinc (ECB 2008)
Executive summary:

A solids-water partitioning coefficient of 2.2 (log value) was determined experimentally on 11 American soils. This value was used in the RA Zinc because it is based on the part of the metals that can actually exchange and is to be assumed in equilibrium with the water phase.Furthermore, experimental values were considered more reliable than field-based, in the RA.