Concentrates of lead and zinc compounds with sulfur resulting from hydrometallurgy (hot acid leaching, super-hot acid leaching and flotation)

Additional information on environmental fate and behaviour

Administrative data

Endpoint:

additional information on environmental fate and behaviour

Type of information:

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

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

results reported were all obtained under conditions relevant for setting the partition coefficient for zinc in marine waters; Read-across justification:Read-across from the most critical and bioavailable constituents (zinc and its compounds):The target substance is a solid inorganic UVCB substance and insoluble in water. Therefore, the environmental hazard assessment and classification is based on the results of the transformation/dissolution study (OECD guidance 29) conducted for the target substance. Based on the mineralogical composition, two major constituents of this target substance in addition to lead are zinc and sulphur. Zinc appears in sulphide form in the target substance. According to the 7-day and 28-day transformation/dissolution study at 100, 10 and 1 mg loadings (OECD guidance 29) zinc and sulphur are also soluble from the target substance. Since sulphur can appear either in sulphide or sulphate form in water, the read-across data focuses on the properties of zinc, and the ERV values and the environmental fate properties are collected from zinc and its bioavailable compounds.

Data source

Reference

Reference Type:

publication

Title:

Trace metal partitioning in estuaries: importnace of salinity and particle concentration

Author:

Turner A

Year:

1996

Bibliographic source:

marine Chemistry 54,27-39

Materials and methods

Test guideline

Qualifier:

no guideline followed

Principles of method if other than guideline:

reported data based on measurements of zinc in suspended matter and water fraction at different locations and calculations of the Kd.

GLP compliance:

not specified

Type of study / information:

partition coeficients are reported for different locations in Europe

Test material

Test material information

Constituent 1

Reference substance name:

Zinc

EC Number:

231-175-3

EC Name:

Zinc

Cas Number:

7440-66-6

Molecular formula:

Zn

IUPAC Name:

zinc

Details on test material:

results expressed as "zinc". The elemental concentrations, originating from various chemical forms, are measured.

Results and discussion

Any other information on results incl. tables

 

Marine Water body	Kd (l/kg)
Clyde	6104
Dee	8898
Tweed	9899
geomean	8131

 

The study mentions also data on some other waters; those were reported in Turner et al, 1993.The paper also reported the Kd values as an equation, so the values for full strength seawater were calculated and are reported. The geomean Kd for zinc is 8131 l/kg.

Applicant's summary and conclusion

Conclusions:

Reported resuls are useful for deriving partition coefficient for Marine waters.

Executive summary:

Paper reported experimental data on 3 UK marine waters. The geomean Kd of reported values is 8131 l/kg.