Manganese ores, reduced

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:

supporting study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

Performed in accordance to the general guidance given in the draft OECD Transformation/Dissolution protocol. The experimental design includes the refinements, agreed by the ad hoc OECD Validation Management Group (VMG), as described in the Standard Operating Procedures prepared by CANMET and LISEC

Cross-reference

Reason / purpose for cross-reference:

other: read-across target

Reference

Endpoint:

additional information on environmental fate and behaviour

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study conducted on read-across material.

Reason / purpose for cross-reference:

read-across source

Ferro-manganese slag: summary of the results for the 24 h screening tests, 100 mg/L loading at pH 6,7 and 8 with an agitation of 200 RPM

pH 6	Blanks			100 mg/L loading
Time, h	Mn, µg/L   S.D.			Mn, µg/L   S.D.
0	0.6		0.28	1930.1		19.12
24	1.2		0.43	8523.0		211.25
pH 7	Blanks			100mg/L loading
Time, h	Mn, µg/L   S.D.			Mn, µg/L   S.D.
0	0.17	0.14		1455.6	38.13
24	0.14	0.11		2623.3	131.51
pH 8	Blanks			100 mg/L loading
Time, h	Mn, µg/L   S.D.			Mn, µg/L   S.D.
0	0.2	0.58		1313.5	60.39
24	0.0	0.30		4759.4	32.86

Ferro-manganese slag: summary of the results of transformation / dissolution tests for 7 days at 10 and 100 mg/L loading and 28 days 1mg/L loading, performed at pH 6 with 100 RPM agitation.

	Blanks		1 mg/L loading
Time, h	Mn, µg/L   S.D.		Mn, µg/L   S.D.
0	0.9	0.65	41.1	2.71
168	0.4	0.17	204.3	9.90
672	0.3	0.14	199.7	22.29

	Blanks		10 mg/L loading
Time, h	Mn, µg/L   S.D.		Mn, µg/L   S.D.
0	0.3	0.22	302.2	14.42
168	0.7	0.39	1556.3	41.79
	Blanks		100 mg/L loading
Time, h
0	0.3	0.22	1593.3	68.83
168	0.7	0.39	8810.1	55.56

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Report date:

2009

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: General guidance given in the draft OECD Transformation/Dissolution protocol. The experimental design includes the refinements, agreed by the ad hoc OECD Validation Management Group (VMG), as described in the Standard Operating Procedures prepared by CANM

Deviations:

no

Remarks:

There were no deviations in the actual tests performed.

GLP compliance:

yes

Remarks:

OECD Principles on Good Laboratory Practice (as revised in 1997), ENV/MC/CHEM(98)17

Type of study / information:

The information relates to manganese leaching out of the test substance into environmentally relevant water at pH 6, and provides a concentration of the metal in water after both 7 days (1,10 and 100 mg/L loading) and 28 days (1mg/L loading)

Test material

Test material information

Constituent 1

Details on test material:

- Name of test material (as cited in study report): ferro-manganese slag
- Physical state: solid

Results and discussion

Any other information on results incl. tables

Ferro-manganese slag: summary of the results for the 24 h screening tests, 100 mg/L loading at pH 6,7 and 8 with an agitation of 200 RPM

pH 6	Blanks			100 mg/L loading
Time, h	Mn, µg/L   S.D.			Mn, µg/L   S.D.
0	0.6		0.28	1930.1		19.12
24	1.2		0.43	8523.0		211.25
pH 7	Blanks			100mg/L loading
Time, h	Mn, µg/L   S.D.			Mn, µg/L   S.D.
0	0.17	0.14		1455.6	38.13
24	0.14	0.11		2623.3	131.51
pH 8	Blanks			100 mg/L loading
Time, h	Mn, µg/L   S.D.			Mn, µg/L   S.D.
0	0.2	0.58		1313.5	60.39
24	0.0	0.30		4759.4	32.86

Ferro-manganese slag: summary of the results of transformation / dissolution tests for 7 days at 10 and 100 mg/L loading and 28 days 1mg/L loading, performed at pH 6 with 100 RPM agitation.

	Blanks		1 mg/L loading
Time, h	Mn, µg/L   S.D.		Mn, µg/L   S.D.
0	0.9	0.65	41.1	2.71
168	0.4	0.17	204.3	9.90
672	0.3	0.14	199.7	22.29

	Blanks		10 mg/L loading
Time, h	Mn, µg/L   S.D.		Mn, µg/L   S.D.
0	0.3	0.22	302.2	14.42
168	0.7	0.39	1556.3	41.79
	Blanks		100 mg/L loading
Time, h
0	0.3	0.22	1593.3	68.83
168	0.7	0.39	8810.1	55.56

Applicant's summary and conclusion

Conclusions:

The test demonstrates low leaching of Mn from the substance, both for short-term and long-term periods is greater than the background concentration of Mn in Europe.