Slags, steelmaking, converter

Additional toxicological data

Administrative data

Endpoint:

additional toxicological information

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2000

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Guideline study using national guideline. Study meets generally accepted scientific principles. Study acceptable for assessment

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2000

Materials and methods

Type of study / information:

Assessment based on comparison of slag leachate concentrations with quality criteria for Drinking Water

Test guideline

Qualifier:

according to guideline

Guideline:

other: DIN 38414 S4

Deviations:

no

Principles of method if other than guideline:

leaching of slag by method which simulates worst case under environmental conditions

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Slags, ferrous metal, blast furnace

EC Number:

266-002-0

EC Name:

Slags, ferrous metal, blast furnace

Cas Number:

65996-69-2

Molecular formula:

~ Al(n)Ca(m)Mg(o)Si(p)O(3n/2+m+o+2p)

IUPAC Name:

Aluminium-Calcium-Magnesium-Silicium oxide equivalent

Constituent 2

Reference substance name:

Salgs, ferrous metal, blast furnace

IUPAC Name:

Salgs, ferrous metal, blast furnace

Details on test material:

Guideline study using national guideline. Study meets generally accepted scientific principles. Study acceptable for assessment

Results and discussion

Any other information on results incl. tables

Leaching data of different kinds of slags im mg/l using leaching method DIN 38414-S4 in comparison with limit values of the German Federal Drinking Water Regulation

Constituent	ABS	GBS	BOS	EAF	SMS	TVO
As	0.002	< 0.001	< 0.001	< 0.01	0.001	0.01
Cd	< 0.0001	< 0.0005	< 0.0001	< 0.0005	0.0002	0.005
Cr	< 0.002	0.001	0.006	<0.01	0.002	0.05
Cu	< 0.001	0.001	0.001	< 0.002	< 0.001	3*
F	0.47	0.2	2.0	< 0.5	2.0	1.5
Hg	< 0.0005	< 0.0005	0.0006	< 0.0005	< 0.0005	0.001
Ni	< 0.002	< 0.002	< 0.002	0.005	0.003	0.05
Pb	< 0.001	< 0.001	0.001	< 0.002	0.02	0.04
SO4	168	30	< 20	< 15	70	240
Zn	< 0.01	< 0.002	0.01	<0.01	0.01	5*
pH	11.0	10.0	12.0	11.5	12.0	6.5 – 9.5

*coefficient

ABS: air-cooled blast furnace slag

GBS: granulated blast furnace slag

TOV: Trinkwasserverordnung (German Federal Drinking Water Regulation)

Slag leachates fulfil the criteria of the German Federal Drinking Water Regulation. Compared with stamdard sea water or mineral water, the requirements for slag leachates are very strict, and application of slags in protected areas (protected area for drinking water supply) is not possible.

With the exception of sulfate of ABS, which is slightly soluble in water, slags are insoluble in water. Heavy metals occur only in traces, and their concentrations are below limits set by the German Federal Drinking Water Regulation.

Applicant's summary and conclusion

Conclusions:

Slag leachtes fulfil the quality criteria of the German Federal Drinking Water Regulation, they cannot pose a risk to human health.

Executive summary:

With the exception of sulfate in ABS, slags are insoluble. Slag leachates fulfil the quality criteria of the German Federal Drinking Water Regulation, and they pose no risk to human health (FEhS 2000 (Geiseler)).