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Administrative data

Endpoint:
monitoring data
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: High-quality environmental geochemical baseline data for Europe provided by the Geochemical Baseline Program of the Forum of European Geological Surveys (FOREGS).

Data source

Referenceopen allclose all

Reference Type:
publication
Title:
Geochemical Atlas of Europe - Part 1: Background information, Methodology and Maps
Author:
Salminen R, et al.
Year:
2005
Bibliographic source:
EuroGeoSurveys
Reference Type:
study report
Title:
Unnamed
Year:
2019
Report date:
2019

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
Evaluation and summary of high quality environmental geochemical data for Europe, which is provided by the Forum of European Geological Surveys (FOREGS), with respect to V concentrations in stream water and stream sediment.
GLP compliance:
no
Type of measurement:
natural background concentration
Media:
other: Natural stream water and stream sediment

Test material

Constituent 1
Reference substance name:
not applicable
IUPAC Name:
not applicable
Test material form:
other: vanadium in the environment
Specific details on test material used for the study:
environmental background concentrations of stream water and stream sediment

Study design

Details on sampling:
Sampling:
The FOREGS sampling grid was based on GTN grid cells developed for Global Geochemical Baseline mapping. This grid divides the entire land surface into 160 km x 160 km cells covering an area of 4,500,000 km2. Sampling methodology, preparation and analysis are described by Salminen et al. (2005).

A total of 808 stream water samples and 852 sediment samples were processed in the FOREGS-program, including 757 paired samples, i.e. samples with the same coordinates for the sampling location of stream water and sediment that are summarised below.

High quality and consistency of the obtained data were ensured by using standardised sampling methods and by treating and analysing all samples in the same laboratory of each country.

Results and discussion

Any other information on results incl. tables

Table 1: Paired vanadium concentrations of stream water, sediments and respective partitioning

Parameter

#

Unit

Min.

Max.

Mean

STDEV

50thp

90thp

water

pH1

7482

7364

-

9.8

4.5

7.5

7.5

5.85

5.85

7.7

7.7

6.5

6.5

water

Ca

757

7444

mg/L

0.23

592.00

56.31

56.16

62.36

61.92

42.63

42.63

117.45

117.51

water

Mg

757

7444

mg/L

0.05

230.00

11.70

11.71

19.56

19.66

6.25

6.23

26.53

26.30

water

NPOC

7523

7444

mg/L

0.25

57.94

7.36

7.42

8.06

8.09

4.76

4.80

16.25

16.35

water

V

757

7444

mg/L

0.00001

0.0195

0.00083

0.00083

0.0015

0.0015

0.00046

0.00046

0.00159

0.00160

sediment

V

757

7444

mg/kg

1

407

68.72

68.84

44.99

45.22

62.5

62.5

124.5

125.0

Partitioning (Kd)

V (sed / water)

757

7444

L/kg

2993

11,200,000

338,493

335,192 

851,446

840,604

115,291

115,607

763,333

764,666

Log Kd

V (sed / water)

757

7444

-

3.48

7.05

5.53

5.53

5.93

5.92

5.06

5.06

5.88

5.88

1Statistics are based on H+concentrations rather than pH.

2Removal of 2 outliers < pH 4.3 and 6 negative values.

3Removal of 1 outlier > 70 mg/L and 4 negative values.

4Values from Switzerland and Albania are not included.

Applicant's summary and conclusion

Conclusions:
Regarding the partitioning of vanadium in the water column, stream water/sediment partition coefficients range from 2993 L/kg to 11,200,000 L/kg. Even though V concentrations of sediments can be as high as 407 mg/kg, V concentrations in the water column of European stream waters are well below 20 μg/L. Since FOREGS sampled on a grid aiming to equally represent geochemical baseline concentrations across Europe, a European median log Kp (solids-water in sediment) value of 5.06 was derived.

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