Potassium hydrogen tartrate

Toxicity to soil microorganisms

Administrative data

Endpoint:

toxicity to soil microorganisms

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

no data

Reliability:

4 (not assignable)

Data source

Reference

Reference Type:

publication

Title:

Biodegradation: The reason for the inefficiency of small organic acids in chelantassisted phytoextraction

Author:

Evangelou M.W. H., Ebel M., Hommes G., and Schaeffer A.

Year:

2008

Bibliographic source:

Water Air Soil Pollute

Materials and methods

Principles of method if other than guideline:

The experiment is designed to investigate NLMWOAs (citric acid, oxalic acid and tartaric acid) consumption by isolated microorganisms on minimal medium agar plates, however, the results indicate such substances imposed no hazardous effect on the isolated soil bacteria and fungi.

Test material

Test material information

Constituent 1

Reference substance name:

(+)-tartaric acid

EC Number:

201-766-0

EC Name:

(+)-tartaric acid

Cas Number:

87-69-4

Molecular formula:

C4H6O6

IUPAC Name:

(2R,3R)-2,3-dihydroxybutanedioic acid

Details on test material:

the original source is not specified, however, a reasonable deduction is that it should be at a high purity as the study is proposed to “investigate the reason for the inefficiency of three NLMWOAs (citric acid, oxalic acid and tartaric acid) in enhancing phytoextraction”, which needs the usage of substances as pure as possible to exclude interference from impurities.

Test substrate

Vehicle:

no

Test organisms

Test organisms (inoculum):

other: Bacteria (Burkholderia sp., Ralstonia sp.); Fungi (Saccharomyces sp.; Cordyceps sp.; Basidiomyces sp.; Paecilomyces sp.; Paecilomyces sp.) individually.

Test conditions

Test temperature:

The flasks were separated in three different groups at incubation temperatures of 18°C, 28°C and 37°C

Moisture:

The soil samples were adjusted to a 50% maximum water holding capacity

Details on test conditions:

pH: 5.5;
temperature: at 18°C, 28°C and 37°C;
time: 3 weeks

Nominal and measured concentrations:

air dried agricultural soil: 1g

Results and discussion

Details on results:

Tartaric acid (2g/L) can be degraded by the isolated microorganisms, which indicate that tartaric acid is not toxic to such isolated bacteria and fungi.

Applicant's summary and conclusion

Conclusions:

It is indicated that tartaric acid is not toxic to such isolated bacteria and fungi.

Executive summary:

The experiment is designed to investigate NLMWOAs (citric acid, oxalic acid and tartaric acid) consumption by isolated microorganisms. Relevant results implied that tartaric acid (2g/L) can be degraded by the isolated microorganisms, which indicates that tartaric acid is not toxic to such isolated bacteria and fungi.