Registration Dossier
Registration Dossier
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EC number: 949-084-9 | CAS number: -
Adsorption / desorption
Administrative data
- Endpoint:
- adsorption / desorption, other
- Remarks:
- Fruendlich's coefficient for inorganic substances
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Justification for type of information:
- Peer reviewed research paper considering the impact of vanadium in soil.
Methods specific for inorganic substances are used; 'standard' methods are not applicable.
Data source
Reference
- Reference Type:
- publication
- Title:
- VANADIUM BIOAVAILABILITY AND TOXICITY TO SOIL MICROORGANISMS AND PLANTS
- Author:
- MAJA A. LARSSON, et al
- Year:
- 2 013
- Bibliographic source:
- Environmental Toxicity and Chemistry 32, 2266-2273
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EPA OPPTS 835.1220 (Sediment and Soil Adsorption / Desorption Isotherm)
- Version / remarks:
- Soils tested
- Principles of method if other than guideline:
- Five soils with contrasting properties were treated with different doses of dissolved vanadate
The lower thresholds were in the concentration range of the background vanadium in the untreated control soils at 15 - 58 mg vanadium /kg - GLP compliance:
- not specified
- Type of method:
- batch equilibrium method
- Media:
- soil
Test material
- Reference substance name:
- Sodium metavanadate
- EC Number:
- 237-272-7
- EC Name:
- Sodium metavanadate
- Cas Number:
- 13718-26-8
- Molecular formula:
- Na.O3V
- IUPAC Name:
- Sodium metavanadate
Constituent 1
- Radiolabelling:
- no
Study design
- Test temperature:
- 20 C
Batch equilibrium or other method
- Analytical monitoring:
- yes
Matrix propertiesopen allclose all
- Matrix no.:
- #1
- Matrix type:
- other: Calcic Cambisol soil
- % Clay:
- ca. 24
- % Org. carbon:
- ca. 0.5
- pH:
- ca. 7.8
- CEC:
- ca. 14.1
- Matrix no.:
- #2
- Matrix type:
- other: Eutric Cambisol
- % Clay:
- ca. 29
- % Org. carbon:
- ca. 2.5
- pH:
- ca. 5.5
- CEC:
- ca. 10.2
Results and discussion
Adsorption coefficientopen allclose all
- Sample No.:
- #1
- Type:
- other: Freundlich Coefficient
- Value:
- 26 dimensionless
- pH:
- 7.8
- Temp.:
- 20 °C
- Matrix:
- Calcic Cambisol
- % Org. carbon:
- ca. 0.5
- Sample No.:
- #2
- Type:
- other: Freundlich coefficient
- Value:
- 188 dimensionless
- pH:
- 5.5
- Temp.:
- 20 °C
- Matrix:
- Eutric Cambisol
- % Org. carbon:
- ca. 2.5
Applicant's summary and conclusion
- Conclusions:
- Adsorption higher in the case of high clay and high organic matter, but vanadium will readily exchange in soils suggesting high mobility in soil.
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