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Environmental fate & pathways

Additional information on environmental fate and behaviour

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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: Tests done according to standard protocol. Good quality and considered useful for defining the transformation/dissolution of cadmium metal in massive form into aqueous media.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2012
Report Date:
2012

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: OECD environmental health and safety publications. Series on testing and assessments N° 29. Guidance document on transformation/dissolution of metals and metal compounds in aqueous media. July 2001.
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: massive form
Details on test material:
for the tests, cadmium metal wires were mounted in epoxy holders, leaving a well-defined metallic surface exposed to the test solution. Exposed surface corresponded to the surface of a 1 mm diameter sphere.

Results and discussion

Any other information on results incl. tables

cadmium massive: summary of the T/D test results (in µg Cd/l) at pH 6 for the 7 days (168 hours) 1, 10 and 100 mg/L loading (acute endpoint) and 28 days (672 hours) for the 1 mg/L loading (chronic endpoint).

 

test

168 hrs

1 mg/l loading

168 hrs

10 mg/l loading

168 hrs

100 mg/l loading

672 hrs

1 mg/l loading

Metallic cadmium, pH 6

23

112

2253

70

The control concentration (T=0) was below detection limit for the whole experiment for all treatments.

Tests were of satisfying repeatability (Coeficient of Variation 5 -12% at 7d; 5% with 1mg L loading at 28 days).

The dissolution was proportional to loading at 1 mg/l and 100mg/l loading. For 10mg/l, a lower dissolution was observed. The higher dissolution rates were used for the assessment.

Applicant's summary and conclusion

Conclusions:
Test results of good quality and relevant for assessing the transformation/dissolution of metallic cadmium in aqueous solutions according to OECD.
Executive summary:

The transformation/Dissolution of cadmium metal in massive form was asssessed in a standard T/D test according to OECD, under conditions mximizing solubilisation (pH 6).

The dissolution was proportional to loading at 1 mg/l and 100mg/l loading. For 10mg/l, a lower dissolution was observed. The higher dissolution rates were used for the assessment.