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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Bioaccumulation: terrestrial

Currently viewing:

Administrative data

Endpoint:
bioaccumulation: terrestrial
Type of information:
experimental study
Adequacy of study:
disregarded due to major methodological deficiencies
Reliability:
3 (not reliable)
Rationale for reliability incl. deficiencies:
other: Data from a monitoring study. No correct analysis for total Mg concentration in soil (extraction with ammonium acetate-EDTA); Mg concentration in worms derived from graphs (average for all species present in a site).

Data source

Reference
Reference Type:
publication
Title:
Earthworm communities along a gradient of urbanization.
Author:
Pizl V., Josens G.
Year:
1995
Bibliographic source:
Environmental Pollution 90:7-14.

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
monitoring study in soils and earthworms from 6 parks along a transect in Brussels. Biota-to-soil -accumulation-factor (BSAF) is calculated as the ratio of the Mg concentration in worms and the Mg concentration in soil.
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Magnesium
EC Number:
231-104-6
EC Name:
Magnesium
Cas Number:
7439-95-4
Molecular formula:
Mg
IUPAC Name:
magnesium dihydride
Details on test material:
Elemental Mg concentration measured, no information on speciation

Test substrate

Vehicle:
no

Test organisms

Details on test organisms:
Earthworms collected in six sites along a gradient of urbanization, including Aporrectodea chlorotica, Aporrectodea caliginosa, Aporrectodea icterica, Aporrectodea rosea, Lumbricus castaneus, Lumbricus rubellus and Lumbricus terrestris

Test conditions

Details on test conditions:
Sandy loam soils; pH (H2O) 5.9-7.1, TOC 2.32-4.38%.
Nominal and measured concentrations:
internal Mg concentrations: 14500-16500 mg Mg/kg dry weight

Results and discussion

Bioconcentration factor
Type:
BSAF
Value:
2.6 - 11.3 L/kg
Basis:
whole body d.w.
Calculation basis:
steady state
Remarks on result:
other: based on monitoring data of Mg concentration in worms and soil

Any other information on results incl. tables

Biota-to-soil -accumulation-factor (BSAF) were calculated as the ratio of the Mg concentration in worms (range 14500 -16500 mg Mg/kg dry weight) and the Mg concentration in soils (range 1103 -5640 mg Mg/kg dry weight) . The BASF range values are between 2.6 and 11.3.

Applicant's summary and conclusion