Slags, copper refining

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

Study period:

2009

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: in accordance to OECD

Cross-reference

Cross-reference 1

Reason / purpose for cross-reference:

reference to same study

Cross-reference 2

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Materials and methods

Principles of method if other than guideline:

The report aims to describe the transformation/dissolution behaviour of copper intermediates through an experimental design that follows the recommendations of the OECD guidance document on transformation/dissolution (T/D) (OECD 2001) and the standard operating procedures (SOP) proposed by CANMET and LISEC for the Transformation / Dissolution protocol to the ad hoc OECD Validation Management Group (VMG) . The developed procedures, called SOP, provide a detailed methodology for T/D that includes instrumentation requirements, reagents quality, procedures for the seven-day and 28-days full test, chemical analyses and a quality assurance program (QA/QC standards). The experimental procedure followed by CIMM can be found in annex I of the study report.

The results of T/D tests can be compared with the eco-toxicity reference values to establish the aquatic hazard classification of the tested substance.

GLP compliance:

no

Remarks:

other quality assurance

Type of study / information:

In accordance to CLP guidance - chapter IV. The metal concentrations released during the transformation/dissolution test are compared to the EC50s of the soluble metal ions. Toxicity is derived through the application of mixture toxicity rules, assuming additivity

Test material

Test material information

Constituent 1

Reference substance name:

Slags, copper refining

EC Number:

266-970-4

EC Name:

Slags, copper refining

Cas Number:

67711-94-8

Molecular formula:

The substance is a UVCB for which it is not possible to provide a molecular formula and a molecular weight.

IUPAC Name:

slag, copper refining

Details on test material:

sample collection was made in according REACH Copper Consortium Sampling Protocols (iuclid 4.1 attachement)
Sample collection made according to ECI/REACH Copper Consortium Standards Protocols (see IUCLID section 1.4)
Sample Description Sample Code Lab code
B8 copper-rich slag from Secondary smelter MC_B8_531_xxx_0904 09TT03335

Results and discussion

Any other information on results incl. tables

Table 1. Summary of metals released for the B8 sample after 7 days of transformation/dissolution test, 100 mg/L loading and pH 6. Metal releases were calculated as the difference between the mean sample release and the mean blanks release at 168 hours.= Below Detection Limit; SD= Standard Deviation

 

Metal	3335 Bulk
7 days – 100 mg/L	Mean	SD
Copper, mg/L	1,618.1	48.74
Nickel, mg/L	22.0	0.40
Arsenic, mg/L	0.3	0.06
Lead, mg/L	1,024.5	46.08
Zinc, mg/L	19	1.1
Aluminium, mg/L	BDL	-
Cobalt,mg/L	17.82	0.582
Molybdenum, mg/L	BDL	-
Barium, mg/L	0.0	-
Strontium, mg/L	BDL	-
Chromium,mg/L	BDL	-
Iron,mg/L	BDL	-
Manganese, mg/L	0.73	0.067
Selenium, mg/L	BDL	-
Cadmium, mg/L	0.19	0.011
Silver,mg/L	BDL	-
Tellurium,mg/L	BDL	-
Tin,mg/L	BDL	-
Antimony,mg/L	2	0.1
Silicon,mg/L	BDL	-

Applicant's summary and conclusion

Conclusions:

Good quality study and data are critical to the assessment of the environmental hazards of the intermediate

Executive summary:

Transformation/dissolution tests of B8 copper slags (Cu-rich) from Secondary Recycler (Worst Case) , were carried out to study its potential to release metals to the environment, in the context of the EU classification and labelling and REACH regulations.

 

Considering the composition of this complex material, a transformation / dissolution test was performed for 7 days at pH 6 and a loading of 100 mg/L, following the release of a broad range of metals from the samples.  The results of the 7 days test for the representative sample, as identified by the European Copper Institute/Reach Copper Consortium showed a copper release to the OECD media of 1618 mg/L, plus Lead release of 1024 mg/l, some minor releases of other metals: zinc, nickel and cobalt (19, 17.8, and 22 µg/L respectively), + some minor releases of other metals (0.1 -2 µg/L).

Chemical composition (% metal X in UVCB, see IUCLID 4.23) is required to express these µg/l values in terms of % release from total amount Metal X present.

Metal	T/D Metal release 3335 Bulk		Chemistry 3335 Bulk	T/D Relative release
7 days – 100 mg/L	Mean	SD	%	In %
Copper, mg/L	1,618.1	48.74	21.80	7.42%
Nickel, mg/L	22.0	0.40	3.06	0.72%
Arsenic, mg/L	0.3	0.06	0.06	0.63%
Lead, mg/L	1,024.5	46.08	11.30	9.07%
Zinc, mg/L	19	1.1	3.45	0.64%
Aluminium, mg/L	BDL	-
Cobalt,mg/L	17.82	0.582	0.32	5.57%
Molybdenum, mg/L	BDL	-
Barium, mg/L	0.0	-
Strontium, mg/L	BDL	-
Chromium,mg/L	BDL	-
Iron,mg/L	BDL	-
Manganese, mg/L	0.73	0.067
Selenium, mg/L	BDL	-
Cadmium, mg/L	0.19	0.011
Silver,mg/L	BDL	-
Tellurium,mg/L	BDL	-
Tin,mg/L	BDL	-
Antimony,mg/L	2	0.1
Silicon,mg/L	BDL	-