Slags, nickel smelting

Water solubility

Administrative data

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Well documented study performed according to OECD Guideline

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

GLP compliance:

no

Remarks:

other quality assurance

Type of method:

flask method

Test material

Test material information

Constituent 1

Reference substance name:

Slags, nickel smelting

EC Number:

920-632-9

Molecular formula:

Not applicable, UVCB, inorganic

IUPAC Name:

Slags, nickel smelting

Details on test material:

Typical nickel slag sample ( 4683) representative for the production process was collected at the manufacturing site:

Sampling and sample preparation was performed according to ECI/REACH C2 Sampling Protocol. The C2 sampling protocol also provides detailed information on the identity of the samples (see IUCLID section 1.4).

Results and discussion

Water solubility

Water solubility:

< 1 mg/L

Temp.:

30 °C

pH:

> 7.39 - < 7.4

Remarks on result:

other: Results obtained after 15-16 days solubilization.

Details on results:

Solubility in water of relevant metal constituents is very limited : <0.2 mg/l for Cu,Zn and Pb and 0.4 mg/l for Ni.

Any other information on results incl. tables

The preliminary test did not indicate any solubility for the studied samples

Average water solubility calculated from the 14-16 days shaking tests.

	Sample code	09TT04683
		Average or range
pH		7.33-7.40
ICP Ag	mg/l	<0.2
ICP Al	mg/l	<0.2
ICP As	mg/l	<0.2
ICP Ca	mg/l	0.8
ICP Co	mg/l	<0.1
ICP Cr	mg/l	<0.1
ICP Cu	mg/l	<0.1
ICP Fe	mg/l	<0.1
ICP K	mg/l	<5
ICP Mg	mg/l	0.3
ICP Mn	mg/l	<0.2
ICP Na	mg/l	1.7
ICP Ni	mg/l	0.4
ICP Pb	mg/l	<0.2
ICP S	mg/l	1
ICP Sb	mg/l	<0.2
ICP Se	mg/l	<0.2
ICP Si	mg/l	2.9
ICP Sn	mg/l	<0.2
ICP Zn	mg/l	<0.2

Applicant's summary and conclusion

Conclusions:

Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)
The solubility of relevant metals from nickel slag is poor (usually <0.2 - 0.4 mg/l) even after after rigourous stirring for 14 -16 days.

Transformation/dissolution tests and bio-elution tests are more applicable to metals and are available from the section "environmental fate and pathways -additional environmental fate" and "toxicological information - toxico-kinetics"

Executive summary:

Nickel slag demonstrate to be slightly slouble after long term agitation.

Given the fact that tested material is complex low soluble metal containing substance, some uncertainties associated with the results remains: possible abrasion of test item , introduction of suspended material into the final extract.

Transformation/dissolution (OECD, 2001) is more suitable for metals and sparingly soluble metal compounds. The outcomes of the transformation/dissolution tests were used for aquatic classification ( see IUCLID Section 5.6)

In vitro bio-accessibility tests were carried out to asses the solubility of metals in copper slag inextraction solvent that resembles gastric fluid (using HCl 0.07N at pH 1.5) in accordance with the ASTM D 5517-07 standard.