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Environmental fate & pathways

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Endpoint:
other distribution data
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
1997
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study well documented, meets generally accepted scientific procedures, acceptable for assessment
Cross-referenceopen allclose all
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study

Data source

Reference
Reference Type:
publication
Title:
Distribution and Transportation of Ethylenediaminetetraacetic acid and Diethylenetriaminepentaacetic acid in lake water and sediment
Author:
Sillanpaa et al
Year:
1997
Bibliographic source:
Chemosphere, Vol.35, No.12, pp. 2797-2806

Materials and methods

Principles of method if other than guideline:
The concentrations of EDTA and DTPA were measured by gas chromatography in Finnish lake waters and sediments influenced by pulp and paper industry.
GLP compliance:
no
Type of study:
other:
Media:
other:

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): EDTA and DTPA

Results and discussion

Any other information on results incl. tables

Concentrations of EDTA in lake water ranged from <1.0 to 11.4 µg/1. Elevated concentrations of EDTA were observed downstream of the mills. The decline in the use of EDTA in total-chlorine-free (TCF) processes is clearly shown by decreased waste water and lake water concentrations of EDTA. Sediment concentrations of EDTA varied between 80 and 310 µg/kg.

In contrast to EDTA, DTPA was not found in lake waters and sediments

Applicant's summary and conclusion

Conclusions:
Concentrations of EDTA in lake water ranged from <1.0 to 11.4 µg/1. Elevated concentrations of EDTA were observed downstream of the mills. The decline in the use of EDTA in total-chlorine-free (TCF) processes is clearly shown by decreased waste water and lake water concentrations of EDTA. Sediment concentrations of EDTA varied between 80 and 310 µg/kg.
In contrast to EDTA, DTPA was not found in lake waters and sediments