Skip to main content Accessibility help
×
Home

Diagenetic reactivity of the plutonium in marine anoxic sediments (Cumbrian mud patch - eastern Irish Sea)

  • J.C. Barescut, J.C. Gariel, J.M. Péres, A. Gouzy (a1) (a2), D. Boust (a1), O. Connan (a1), G. Billon (a3), L. León Vintró (a4), J. Lucey (a4), L. Bowden (a4), M. Agarande (a5), S. Lesourd (a6), P. Lesueur (a2), A. Klein (a1) (a2), P. J. Kershaw (a7) and P. I. Mitchell (a4)...

Abstract

An extensive diagenetic study carried out on a sediment core collected in the Cumbrian mud patch off the Sellafield nuclear reprocessing plant, is presented. Sequential leaching data, using a thoroughly validated protocol specifically designed to prevent any resorption of the released plutonium in the course of the extraction, demonstrate that a significant proportion of the plutonium is loosely bound to sites that readily exchange with seawater, oxidise upon oxygenated water contact (reactive sulphides) or easily dissolve upon changes in pH. Such a result contradicts many previous sequential extraction studies which have reported that little of the plutonium in Irish Sea sediments is in a readily available form. The profile of dissolved plutonium in pore waters indicates an active uptake process at depth, probably linked to sulphide (Acid Volatile Sulphide) precipitation. These reactive sulphides are liable to act as source of plutonium to the overlying water if they are brought close the interface by bioturbation or in contact with oxygenated seawater by burrowing activity.

Copyright

Diagenetic reactivity of the plutonium in marine anoxic sediments (Cumbrian mud patch - eastern Irish Sea)

  • J.C. Barescut, J.C. Gariel, J.M. Péres, A. Gouzy (a1) (a2), D. Boust (a1), O. Connan (a1), G. Billon (a3), L. León Vintró (a4), J. Lucey (a4), L. Bowden (a4), M. Agarande (a5), S. Lesourd (a6), P. Lesueur (a2), A. Klein (a1) (a2), P. J. Kershaw (a7) and P. I. Mitchell (a4)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed