Ashes (residues), nonhazardous municipal solid waste

Particle size distribution (Granulometry)

Administrative data

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

7.3.2008-10.3.2008

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2008

Report date:

2008

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: ISO 13320-1 Particle size analysis - Laser diffraction methods

Deviations:

no

GLP compliance:

yes

Type of method:

Laser scattering/diffraction

Type of distribution:

volumetric distribution

Test material

Test material information

Constituent 1

Reference substance name:

Ashes (residues)

EC Number:

268-627-4

EC Name:

Ashes (residues)

Cas Number:

68131-74-8

Test material form:

solid: bulk

Details on test material:

- Name of test material (as cited in study report): Ashes (residues)
- Substance type: technical product
- Physical state: solid
- Main components: SiO2 (42.12%), Al2O3 (32.16%), Fe2O3 (10.88%), TiO2, MnO, MgO, CaO, Na2O, K2O, SO3 - constituents with content less than 10%
- Expiration date of the lot/batch: unlimited
- Appearance: greyish black powder

Results and discussion

Particle size

Particle size 1

Percentile:

D50

Mean:

11.64 µm

Remarks on result:

other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.

Particle size 2

Percentile:

D10

Mean:

< 5.9 µm

St. dev.:

0.14

Particle size 3

Percentile:

D90

Mean:

< 22.61 µm

St. dev.:

3.07

Any other information on results incl. tables

Measured values

The results of determination of particle size distribution test substance are presented in following table.

 

Table No. 1 Results of determination of particle size distribution

Determination	Median (µm)	Diameter on Cumulative 90% (µm)	Diameter on Cumulative 10% (µm)	Span (-)
1	11.86	28.22	5.88	1.88
2	11.37	21.88	5.67	1.43
3	11.64	22.61	5.90	1.44
4	11.47	21.93	5.71	1.41
5	11.88	27.85	5.86	1.85
6	11.69	22.01	6.06	1.36
Average	11.65	24.08	5.85	1.56
Standard deviation	0.21	3.07	0.14	0.24

 

The value nearest to average is used as final result of the test.That is the 3^rdmeasurement.

Criteria of quality

The test satisfied quality criteria as follows:

The individual results of median (MMAD) from single testing should not vary more than 10 % from the average. For our measurements the calculated critical range is 12.82 to 10.48 µm.

We performed 6 measurements and the individual values fall within the range of quality criterion (actual range is 11.37 to 11.88).

The criterion of quality was met.

Applicant's summary and conclusion

Executive summary:

The determination of the particle size distribution of the test substance, Ashes (residues) was determined. The laser diffraction method was used.

Test was performed according to the standard ISO 13320-1 Particle size analysis – Laser diffraction methods – Part 1: General principles, First edition 1999-11-01.

The recommendations of Guidance Document on the Determination of Particle Size Distribution, Fibre Length and Diameter Distribution of Chemical Substances, EUR 20268 EN (2002) were considered.

Particle size distribution of the test substance Ashes (residues) is characterized by the following table:

Determination	Median (µm)	Diameter on Cumulative 90% (µm)	Diameter on Cumulative 10% (µm)	Span (-)
Final result	11.64	22.61	5.90	1.44
Extended uncertainty	0.41	6.15	0.28	-

Extended uncertainty was calculated by using coefficient 2.