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Administrative data

Endpoint:
additional ecotoxicological information
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1995-2000
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
Cross-reference
Reason / purpose for cross-reference:
reference to same study

Data source

Referenceopen allclose all

Reference Type:
publication
Title:
Physical and chemical characteristics of blast furnace, basic oxygen furnace, and electric arc furnace steel industry slags
Author:
Proctor DM, Fehling KA, Wittenborn JL, Green JJ, Avent C, RD Bigham, Connolly M, Lee B, Shepker TO, Zak MA
Year:
2000
Bibliographic source:
Environ. Sci. Technol. 34, 1576-1582.
Reference Type:
other: Guidance document used in this study
Title:
Unnamed
Year:
1989

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: ASTM 1311 Toxicity Characteristic Leaching Procedure
Deviations:
no
Principles of method if other than guideline:
US EPA (Environmental Protection Agency), Office of Emergency and Remedial Response 1989 Assessment Guidance for Superfund Volume 1, Human Health Evaluation Manual Part A; interim final; EPA/540/1-89/002; US Government Printing Office: Washington, DC
GLP compliance:
not specified
Type of study / information:
Assessment by comparison of slag leachates (from acidic elution) with US TCLP screening criteria; Risk Assessment Guidance for Superfund Volume 1, Human Health Evaluation Manual Part A; interim final; EPA/540/1-89/00

Test material

Constituent 1
Chemical structure
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:
oxo[(oxoalumanyl)oxy]alumane; oxocalcium; oxoiron; oxomagnesium; silanedione
Details on test material:
see below for ananlytical information

Results and discussion

Any other information on results incl. tables

Comparison of metal concentrations of acidic slag leachates (TCLP) to US TCLP criteriaf

 

Metal

TCLP screening criteriona(mg/L)

BF95% upper confidence limit (TCLP)b

Criterion exceeded? BF

Arsenic

5

0.0048c

no

Barium

100

1.2d

no

Cadmium

1

0.0054e

no

Chromium(VI)

5

0.026c

no

Chromium (total)

5

0.22d

no

Lead

5

ND

no

Mercury

0.2

ND

no

Selenium

1

ND

no

Silver

5

ND

no

aASTM 1311 Toxicity Characteristic Leaching Procedure.b95percentile upper confidence limit.cMaximum leachate concentration if detection frequency is less than 50%.dMaximum concentration if exceeded by the 95percentile upper confidence limit.elog-normal 95percentile upper confidence limit.fTCLP, toxicity characteristics leaching potential; ND, not detected.

Applicant's summary and conclusion

Conclusions:
Not ecotoxic
Executive summary:

Major analytical constituents of ferrous slag are aluminium, calcium, iron, magnesium, manganese, phosphorus, silicon, and sulfur.

The essential elements calcium, carbon, magnesium, phosphorus and sulfur are ubiquitous in the earth´s crust and are not relevant for risk assessment (US EPA 1989).

The release of metals from the matrix into the leaching liquid was very low. In general, it was less than 0.1 % of the metals.

None of the metal concentrations in the leachates exceeded US EPA leaching threshold values for (eco)toxicity (Proctor et al. 2000).