Cadmium

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: 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

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

Test material information

Constituent 1

Reference substance name:

Cadmium

EC Number:

231-152-8

EC Name:

Cadmium

Cas Number:

7440-43-9

Molecular formula:

Cd

IUPAC Name:

cadmium

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 assessed in a standard T/D test according to OECD, under conditions maximizing 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.