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Ecotoxicological information

Toxicity to soil microorganisms

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Endpoint:
toxicity to soil microorganisms
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
1997, 1989
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: no glp, no methode, citated by RIVM
Qualifier:
no guideline available
Principles of method if other than guideline:
see primary source:
Liang CN, Tabatabai MA. 1977. Effects of trace elements on nitrogen mineralization in soils. Environ Pollut 12: 141-147.
Wilke BM. 1989. Long-term effects of different inorganic pollutants on nitrogen transformations in a sandy cambisol. Biol Fertil Soils 7: 254-258.
GLP compliance:
no
Analytical monitoring:
not required
Vehicle:
not specified
Test organisms (inoculum):
soil
Total exposure duration:
20 d
Remarks:
N-mineralisation
Moisture:
n.a.
Duration:
20 d
Dose descriptor:
NOEC
Effect conc.:
593 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
dissolved
Remarks:
Sn
Basis for effect:
other: inhibition N-mineralisation
Remarks on result:
other: clay 23%
Duration:
20 d
Dose descriptor:
NOEC
Effect conc.:
593 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
dissolved
Remarks:
Sn
Basis for effect:
other: inhibition N-mineralisation
Remarks on result:
other: clay 45 %
Duration:
20 d
Dose descriptor:
NOEC
Effect conc.:
297 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
dissolved
Remarks:
Sn
Basis for effect:
other: inhibition N-mineralisation
Remarks on result:
other: clay 30 %
Duration:
20 d
Dose descriptor:
NOEC
Effect conc.:
297 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
dissolved
Remarks:
Sn
Basis for effect:
other: inhibition N-mineralisation
Remarks on result:
other: clay 34 %
Duration:
20 d
Dose descriptor:
NOEC
Effect conc.:
234 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
dissolved
Remarks:
Sn
Basis for effect:
other: inhibition N-mineralisation
Remarks on result:
other: clay 0%, field
Validity criteria fulfilled:
not applicable
Conclusions:
NOEC(20d)=297 mg/kg dw
Endpoint:
toxicity to soil microorganisms
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
1983
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: no glp, no methode, citated by RIVM
Qualifier:
no guideline available
Principles of method if other than guideline:
primary source:
Lighthart B, Baham J, Volk VV. 1983. Microbial respiration and chemical speciation in
metal-amended soils. J Environ Qual 12: 543-548.
GLP compliance:
not specified
Analytical monitoring:
yes
Vehicle:
not specified
Test organisms (inoculum):
soil
Total exposure duration:
9 d
Moisture:
4.7
Key result
Duration:
9 d
Dose descriptor:
EC10
Effect conc.:
6.8 mg/kg soil dw
Nominal / measured:
meas. (initial)
Conc. based on:
dissolved
Remarks:
Sn
Basis for effect:
other: inhibition
Remarks on result:
other: clay 11 %
Key result
Duration:
9 d
Dose descriptor:
EC10
Effect conc.:
25 mg/kg soil dw
Nominal / measured:
meas. (initial)
Conc. based on:
dissolved
Remarks:
Sn
Basis for effect:
other: inhibition
Remarks on result:
other: clay 21 %
Key result
Duration:
9 d
Dose descriptor:
EC10
Effect conc.:
760 mg/kg soil dw
Nominal / measured:
meas. (initial)
Conc. based on:
dissolved
Remarks:
Sn
Basis for effect:
other: inhibition
Remarks on result:
other: clay 51%
Key result
Duration:
9 d
Dose descriptor:
EC10
Effect conc.:
687 mg/kg soil dw
Nominal / measured:
meas. (initial)
Conc. based on:
dissolved
Remarks:
Sn
Basis for effect:
other: inhibition
Validity criteria fulfilled:
yes
Conclusions:
EC10(9d)=6.8 mg/kg dw

Description of key information

Key value for chemical safety assessment

Long-term EC10 or NOEC for soil microorganisms:
6.8 mg/kg soil dw

Additional information