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Environmental fate & pathways

Additional information on environmental fate and behaviour

Administrative data

Endpoint:
additional information on environmental fate and behaviour
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: follows standard guideline, acceptable without restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: OECD Test Guideline No 29 (2001)
Deviations:
no
GLP compliance:
no
Remarks:
according to the principles of GLP
Type of study / information:
24-h transformation dissolution pre-test

Test material

Constituent 1
Reference substance name:
Residues, copper speiss acid leaching
EC Number:
309-643-4
EC Name:
Residues, copper speiss acid leaching
Cas Number:
100656-54-0
IUPAC Name:
copper(2+) lambda2-lead(2+) antimony tetraarsenic hexacopper lead dinickel decasulfur disulfanediide
Details on test material:
Batch: 151944
Sampling date: 12/02/2010
Manufacturer: Umicore Precious Metals
Active ingredients: silver, arsenic, copper, nickel and lead.
Physical form: solid (powder)
Colour: dark grey
Storage: room temperature; in the dark
Expiry date: 10/02/2011
Safe handling precautions: May cause substances which are carcinogenic through inhalation; Limit dust exposure to the maximal extend and avoid breathing potential dust; Wear gloves when handling to prevent dermal exposure; Eliminate waste which was in contact with the material as hazardous waste and in safe and closed conditions

Results and discussion

Any other information on results incl. tables

The blank values of silver, arsenic, copper, nickel, lead in the test medium at pH 6 and 8 were below the detection limit.

pH 6

In the blank control vessels 24-h pre-test @ 100rpm at pH 6 no detectable values for silver, arsenic, copper, nickel and lead have been measured.

In the blank corrected test item vessels 24-h pre-test @ 100rpm at pH 6 all metals showed average dissolution concentrations above the detection limit. For the metal silver a very small amount of 0.02 µg Ag/L was measured with a coefficient of variation of 59%. This variation coefficient exceeded the 20% quality criterion probably due to the very low concentration values near the detection limit. High amounts of lead (57.7 µg Pb/L) and copper (487 µg Cu/L) were detected with a coefficient of variation of respectively 11% and 3%. The most important metals detected were nickel and arsenic with an average concentration of 1257 µg Ni/L and 1407 µg As/L, respectively. The coefficients of variation for these values were 2% and 3%.

pH 8

In the blank control vessels 24-h pre-test @ 100rpm at pH 8 no detectable values for silver, arsenic, copper, nickel and lead have been measured.

In the blank corrected test item vessels 24-h pre-test @ 100rpm at pH 8 no detectable values for silver have been measured. For the metal lead an average concentration of 10.7 µg Pb/L was measured with a coefficient of variation of 19%. A large amount of copper (160 µg Cu/L) was detected with a coefficient of variation of 1%. The most important metals detected in this test medium were arsenic and nickel with an average concentration of respectively 1093 µg As/L and 1218 µg Ni/L and with a coefficient of variation of 2% and 1%, respectively. All coefficients of variation were below the quality criterion of 20%.

Applicant's summary and conclusion

Conclusions:
The worst case pH defined in this test is pH 6. Silver, arsenic, copper, nickel and lead showed dissolution concentrations above their detection limit and may be important in the design of a full test for classification purposes.
Executive summary:

The worst case pH defined in this test is pH 6. Silver, arsenic, copper, nickel and lead showed dissolution concentrations above their detection limit and may be important in the design of a full test for classification purposes.

This study is considered reliable an acceptable for use as a key study.