Registration Dossier

Administrative data

Endpoint:
other distribution data
Type of information:
experimental study
Adequacy of study:
disregarded due to major methodological deficiencies
Study period:
2009
Reliability:
3 (not reliable)
Rationale for reliability incl. deficiencies:
other: Significant methodological deficiences as e.g. analytical methods were not sensitive enough to detect the substances relevant for the study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report Date:
2009

Materials and methods

Principles of method if other than guideline:
Analysis of the solubility of certain elements occuring in the fine dust fraction of GGBS
GLP compliance:
no
Type of study:
other: bioavailability
Media:
other: solid-water

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent
Details on test material:
GGBS (Slags, ferrous metal, blast furnace, ground granulated)

Results and discussion

Any other information on results incl. tables

Analytical information on GGBS (mg/kg dry weight)

Parameter

GGBS

Fine dust fraction of GGBS

As

< 1.0

< 3.0

Cd

< 0.5

< 0.3

Cr

48

< 3.0

Cu

5

< 3.0

Hg

< 0.2

< 0.1

Mo

< 5.0

<3.0

Ni

7.4

< 3.0

Pb

< 5.0

< 3.0

S

10400

6100

Sb

< 5.0

< 3.0

Ti

n.d.

2610

Tl

< 0.5

< 5.0

V

22

< 3.0

Zn

11

76.5

Analytical information on the fine dust fraction (< 10 micrometers) of GGBS and its leachates in sodium chloride solution and in aquatic solution (mg/kg dry weight and mg/kg of solution, respectively)

Parameter

Total content

Bioavailable*

Bioavailable**

As

< 3.0

n.d.

n.d.

Cd

<0.3

n.d.

n.d.

Cr

< 3.0

n.d.

n.d.

Cu

< 3.0

n.d.

n.d.

Hg

<0.1

n.d.

n.d.

Mo

<3.0

n.d.

n.d.

Ni

< 3.0

n.d.

n.d.

Pb

< 3.0

n.d.

n.d.

S

6100

6100

6100

Sb

< 3.0

n.d.

n.d.

Ti

2610

< 3***

< 3***

Tl

< 5.0

n.d.

n.d.

V

< 3.0

n.d.

n.d.

Zn

76.5

< 3***

< 3***

*Bioavailable fraction (physiological sodium chloride solution)

**Bioavailable fraction (bidestilled water)

***These data were reported on special request by the analytical laboratory, and they are not reported in the study report

Most data cannot be used to draw any conclusion on bioavailability. In 11 out of 14 cases, the element concentrations in the solid fine dust fraction and in both leachates were below the respective limits of detection. Thus, it cannot be excluded from the data that up to 100 % of the total content of these elements are bioavailable.

In the case of Zn and Titan, no limit of detection is reported for the leachates in the report.

According to the data, all sulfur of the fine dust fraction is bioavailable.

Applicant's summary and conclusion

Conclusions:
No conclusion on bioavailability can be drawn from the data generated in the study
Executive summary:

The analytical methods applied in the testing laboratory were not sensitive enough to detect the relevant metals in leachates thus no conclusion on bioavailability can be drawn from the data generated in the study.