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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

Currently viewing:

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:
2005
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

Constituent 1
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
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.