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Ecotoxicological information

Toxicity to soil microorganisms

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Administrative data

Endpoint:
toxicity to soil microorganisms
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Method not in accordance with OECD guideline 217, but method meets generally accepted standards and is described in sufficient detail. Peer reviewed (WHO 1998).

Data source

Referenceopen allclose all

Reference Type:
publication
Title:
Influence of trace metals on carbon dioxide evolution from Yolo soil
Author:
Chang FH, Broadbent FE
Year:
1981
Bibliographic source:
Soil Science 132(6): 416-421
Reference Type:
secondary source
Title:
Environmental Health Criteria (EHC) 200, Copper
Author:
WHO
Year:
1998

Materials and methods

Principles of method if other than guideline:
3 months, carbon dioxide production was measured in silt loam amended with alfalfa meal, sewage sludge and several heavy metal solutions.
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Analytical purity: Analytical grade

Sampling and analysis

Analytical monitoring:
yes

Test substrate

Vehicle:
no

Test organisms

Test organisms (inoculum):
soil

Study design

Total exposure duration:
12 wk

Test conditions

Test temperature:
25°C
Moisture:
60% of water holding capacity
Nominal and measured concentrations:
0, 50, 100, 200, 300, 400 µg/g soil d.w. (nominal)

Results and discussion

Effect concentrationsopen allclose all
Duration:
12 wk
Dose descriptor:
EC10
Effect conc.:
4.2 mg/kg soil dw
Nominal / measured:
meas. (not specified)
Conc. based on:
element
Remarks:
Cu
Basis for effect:
respiration rate
Remarks on result:
other: DTPA-soluble metal
Duration:
12 wk
Dose descriptor:
EC10
Effect conc.:
7.3 mg/kg soil dw
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Remarks:
CH2Cu2O5
Basis for effect:
respiration rate
Remarks on result:
other: DTPA-soluble metal

Applicant's summary and conclusion