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Physical & Chemical properties

Additional physico-chemical information

Administrative data

Endpoint:
other: representative mineralogy
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: non GLP but other quality assurance
Cross-reference
Reason / purpose for cross-reference:
reference to same study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Principles of method if other than guideline:
Chemistry /elemental analysis was determined using ICP (inductively Coupled Plasma spectroscopy). Metal speciation/metal mineralogy was assessed from Sequential extraction/metal analysis and mineralogical analysis (XRD and microscopes equipped with EDS (Energy Dispersive Spectrometry) and WDS (Wavelength Dispersive Spectrometry) analysers. The interpretation of the overall results was performed by expert (with profound knowledge of metal particularities).
GLP compliance:
no
Remarks:
other quality assurance

Test material

Constituent 1
Reference substance name:
Zinc, desilverizing skims
EC Number:
273-802-3
EC Name:
Zinc, desilverizing skims
Cas Number:
69029-60-3
Molecular formula:
Molecular weigth/formula concept not applicable to Inorganic UVCB (comlex metal containing substance)
IUPAC Name:
Zinc, desilverizing skims

Results and discussion

Results:
The studied sample 09TT08130 contains 66.7% lead, 20.8% zinc, 11% silver and traces of other elements.
The studied sample 09TT09779 contains 72.7% lead, 16.3% zinc, 7.6% silver and traces of other elements.

The studied sample 09TT08130 consists mainly of metallic lead (68.5%) and silver zinc, AgZn3 (31%). Metallic lead occurs as coarse grains which are associated with silver zinc –alloys. Silver zinc –alloys occur also as matrix between metallic lead grains.
The studied sample 09TT09779 consists mainly of metallic lead (72.8%), silver zinc –alloy, AgZn3 (25.5%) and lead oxide (1%). Metallic lead occurs as coarse grains which are associated with silver zinc –alloys. Silver zinc –alloys occur also as matrix between metallic lead grains. Sometimes the rims of metallic lead are strongly oxidized.

Any other information on results incl. tables

Chemical composition of the reference samples

ORC ref.

 

 

OR22

OR29

Sample

 

 

2000171/17

2000171/21

Lab code

 

 

00TT08130

09TT09779      

Substance

 

Zinc desilverising skims

Zinc desilverising skims

EINECS

 

 

273-802-3

273-802-3

Consortium reference No.

13

13

 

 

 

 

 

Ag

KEM

%

11.00

7.56

B

KEM

%

N/A

N/A

Bi

TOT

%

0.391

0.014

Cd

TOT

%

<0.003

0.016

Co

TOT

%

<0.003

0.003

Mo

TOT

%

<0.003

<0.003

Sb

TOT

%

<0.014

<0.06

Se

TOT

%

<0.003

<0.06

Sn

TOT

%

<0.003

0.0043

Te

TOT

%

< 0.014

<0.02

Zn

TOT

%

20.80

16.30

 

 

 

 

 

SiO2

KEM

%

0.049

0.06

Al2O3

TOT

%

<0.005

<0.006

CaO

TOT

%

0.023

0.005

Cr2O3

TOT

%

<0.004

<0.004

K2O

TOT

%

<0.084

<0.04

MgO

TOT

%

0.014

<0.005

MnO

TOT

%

<0.004

<0.004

Na2O

TOT

%

0.032

<0.04

(SO4)2

KEM

%

0.011

0.007

 

 

 

 

 

S

LECO

%

<0.01

<0.01

C

LECO

%

0.02

0.025

 

 

 

 

 

Satmagan

 

%

0

0

ORC ref.

 

 

OR22

OR29

 

Sample

 

 

2000171/17

2000171/21

 

Lab code

 

 

00TT08130

09TT09779      

 

Substance

 

Zinc desilverising skims

Zinc desilverising skims

 

EINECS

 

 

273-802-3

273-802-3

 

Consortium reference No.

13

13

 

 

 

 

 

 

 

As

P1

%

<0.007

<0.004

 

 

P2

%

<0.017

<0.010

 

 

P3

%

<0.009

<0.005

 

 

P4

%

<0.003

0.073

 

 

PSUM

%

<0.003

0.073

 

 

TOT

%

<0.003

0.035

 

 

 

 

 

 

 

Cu

P1

%

<0.007

<0.004

 

 

P2

%

<0.017

<0.010

 

 

P3

%

0.026

0.04

 

 

P4

%

0.25

0.18

 

 

PSUM

%

0.28

0.22

 

 

TOT

%

0.25

0.18

 

 

 

 

 

 

 

Fe

P1

%

<0.007

<0.004

 

 

P2

%

<0.017

0.013

 

 

P3

%

<0.009

0.037

 

 

P4

%

0.013

0.008

 

 

PSUM

%

0.013

0.058

 

 

TOT

%

0.015

0.011

 

 

 

 

 

 

 

Ni

P1

%

<0.007

<0.004

 

 

P2

%

<0.017

<0.010

 

 

P3

%

<0.009

<0.005

 

 

P4

%

0.01

0.016

 

 

PSUM

%

0.01

0.016

 

 

TOT

%

0.01

0.022

 

 

 

 

 

 

 

Pb

P1

%

0.041

0.24

 

 

P2

%

0.17

0.13

 

 

P3

%

0.23

0.52

 

 

P4

%

62.90

64.90

 

 

PSUM

%

63.34

65.79

 

 

TOT

%

66.70

72.70

 

 

Applicant's summary and conclusion

Conclusions:
Good quality study that assessed full chemistry and mineralogy of two representative samples of zinc desilversing skims. The mineralogy (and the distribution pattern for each key element, i.e. % from Total into the various mineralogical forms/species present into the UVCB) of the reference samples can be used to derive the classification of zinc desilversing skims samples (mixture toxicity rules).
Executive summary:

The studied sample 09TT08130 consists mainly of metallic lead (68.5%) and silver zinc, AgZn3 (31%). Metallic lead occurs as coarse grains which are associated with silver zinc –alloys. Silver zinc –alloys occur also as matrix between metallic lead grains. The studied sample 09TT09779 consists mainly of metallic lead (72.8%), silver zinc –alloy, AgZn3 (25.5%) and lead oxide (1%). Metallic lead occurs as coarse grains which are associated with silver zinc –alloys. Silver zinc –alloys occur also as matrix between metallic lead grains. Sometimes the rims of metallic lead are strongly oxidized.

The mineralogy of the reference samples can be used to derive the classification of both samples but also to predict the mineralogy of other zinc desilverising skims samples. The calculator sheet, which is used to derive the classification and which reflects particular assumptions that are made, can be found in attachment above (attached background material).

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