Registration Dossier
Registration Dossier
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EC number: 232-055-3 | CAS number: 7784-25-0
Adsorption / desorption
Administrative data
- Endpoint:
- adsorption / desorption
- Remarks:
- adsorption
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- weight of evidence
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- other: Study not performed according to standard guideline nor GLP. The report is not sufficiently well documented to assess the reliability of the results.Peer reviewed data.
Data source
Reference
- Reference Type:
- other company data
- Title:
- Unnamed
- Year:
- 2 005
- Report date:
- 2005
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Calculation based on measured concentrations in groundwater and sediment. To estimate a soil Kd, ground water Al concentration and soil (sediment) Al concentration were used. Al groundwater concentrations vary in E-area between 0.0178 to 0.216 mg/L (EGIS; http://egis1.srs.gov/Website/sgcp_wasteunits/viewer.htm). An average Al concentration of sediments on SRS is 8,060 mg/kg for 168 samples. Dividing the soil Al concentration by the groundwater Al concentration, yields a ratio of >37,000 mL/g. To provide some level of conservatism a value 1/10, 3,700 mL/g, was used.
- GLP compliance:
- no
- Type of method:
- other: calculation
- Media:
- soil
Test material
- Reference substance name:
- Aluminium
- EC Number:
- 231-072-3
- EC Name:
- Aluminium
- Cas Number:
- 7429-90-5
- IUPAC Name:
- aluminum
- Details on test material:
- No data
Constituent 1
- Specific details on test material used for the study:
- Details on properties of test surrogate or analogue material (migrated information):
No data
Study design
- Test temperature:
- No data
HPLC method
- Details on study design: HPLC method:
- No data
Batch equilibrium or other method
- Analytical monitoring:
- yes
- Details on sampling:
- To estimate a soil Kd, ground water Al concentration and soil (sediment) Al concentration were used. Al groundwater concentrations vary in E-area between 0.0178 to 0.216 mg/L (EGIS; http://egis1.srs.gov/Website/sgcp_wasteunits/viewer.htm). An average Al concentration of sediments on SRS is 8,060 mg/kg for 168 samples.
- Details on matrix:
- No data
- Details on test conditions:
- No data
- Computational methods:
- To estimate a soil Kd, ground water Al concentration and soil (sediment) Al concentration were used. Al groundwater concentrations vary in E-area between 0.0178 to 0.216 mg/L (EGIS; http://egis1.srs.gov/Website/sgcp_wasteunits/viewer.htm). An average Al concentration of sediments on SRS is 8,060 mg/kg for 168 samples. Dividing the soil Al concentration by the groundwater Al concentration, yields a ratio of >37,000 mL/g. To provide some level of conservatism a value 1/10, 3,700 mL/g, was used.
Results and discussion
Adsorption coefficient
- Type:
- Kd
- Value:
- 3 700
- Remarks on result:
- other: not stated
Results: HPLC method
- Details on results (HPLC method):
- No data
Results: Batch equilibrium or other method
- Adsorption and desorption constants:
- Dividing the soil Al concentration by the groundwater Al concentration, yields a ratio of >37,000 mL/g. To provide some level of conservatism a value 1/10, i.e. 3,700 mL/g, was used.
- Recovery of test material:
- No data
- Concentration of test substance at end of adsorption equilibration period:
- No data
- Concentration of test substance at end of desorption equilibration period:
- No data
Any other information on results incl. tables
Aluminium sorption to sediments is controlled largely by solubility and to a lesser extent by adsorption.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- Aluminium sorption to sediments is controlled largely by solubility and to a lesser extent by adsorption. Dividing the soil Al concentration by the groundwater Al concentration, yields a ratio of >37,000 mL/g. To provide some level of conservatism a value 1/10, 3,700 mL/g, was used.
- Executive summary:
To estimate a soil Kd, ground water Al concentration and soil (sediment) Al concentration were used. Al groundwater concentrations vary in E-area between 0.0178 to 0.216 mg/L (EGIS; http://egis1.srs.gov/Website/sgcp_wasteunits/viewer.htm). An average Al concentration of sediments on SRS is 8,060 mg/kg for 168 samples. Dividing the soil Al concentration by the groundwater Al concentration, yields a ratio of >37,000 mL/g. To provide some level of conservatism a value 1/10, 3,700 mL/g, was used.
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