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Characterisation of Natural Colloids in a Shallow Glacial Aquifer and Their Radionuclide Loading

Published online by Cambridge University Press:  26 February 2011

G. Longworth ,
M. A. Wilkins  and
M. Ivanovich
G. Longworth
Affiliation:
Uranium Series Disequilibrium Section, Harwell Laboratory, Oxon OXII ORA, UK
M. A. Wilkins
Affiliation:
Uranium Series Disequilibrium Section, Harwell Laboratory, Oxon OXII ORA, UK
M. Ivanovich
Affiliation:
Uranium Series Disequilibrium Section, Harwell Laboratory, Oxon OXII ORA, UK
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Abstract

This paper presents the results of a physical, chemical and actinide characterisation of the groundwater in a shallow glacial sand aquifer, in which tracer tests aie currently being conducted by t lu- British Geological Survey (BGS).

Uranium Series disequilibrium measurements have been used to determine the partition of natural actinide activities betueen the particulate, colloid and solution phases of the groundwnters from sevpral geologically dissimilar sites. The activity fractions associated with the colloid phase were found to be (0.1–0.52) for uranium and (1–52) for thorium.

Scanning electron microscopy analysis yielded values of 103−101 particles/litre for the colloid concentration. Mean mobilities for the colloids determined by electrophoresis were in the range -(1–2) × 10−6 m2S−1v−1.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 127: Symposium BERLIN – Scientific Basis for Nuclear Waste Management XII , 1988 , 755
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

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