|Appears in Collections:||Biological and Environmental Sciences Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Annual cycle of radionuclide contamination on tide-washed pasture in the Mersey Estuary, NW England|
|Authors:||Johnson, Michael S|
Fox, Winston M
Jones, Steve R
|Publisher:||Springer/ Coastal and Estuarine Research Federation|
|Citation:||Johnson MS, Copplestone D, Fox WM & Jones SR (2001) Annual cycle of radionuclide contamination on tide-washed pasture in the Mersey Estuary, NW England, Estuaries and Coasts, 24 (2), pp. 198-203.|
|Abstract:||The radionuclide burden of vegetation comprising a tide-washed pasture at Ince Marsh in the Mersey Estuary, U.K., derives mainly from adhered external particulates originating as suspended sediments in estuarine water. Radionuclide concentrations are dominated by the growth cycle of the vegetation, with the highest winter levels of contamination activity an order of magnitude greater than the lowest levels in mid-summer. A secondary effect due to sediment transfer during periods of severe flooding produces subsidiary features on this dominant seasonal profile. Radionuclide concentrations on vegetation are in the range137Cs=8–191,134Cs=0.3–0.9,241Am=0.6–46,238Pu=0.1–1.5, and239/240Pu=0.8–44 Bq kg−1. These ranges reflect the relative concentrations of radionuclides in estuarine sediment (137Cs=615,241Am=202, and239/240Pu=104 Bq kg−1) rather than the values in filtered estuary water (137Cs=0.4,241Am=0.001, and239/240Pu=0.001 Bq 1−1). Median Kd values for these radionuclide species are Cs=1,400, Am=200,000, and Pu|
|Rights:||The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.|
|Affiliation:||University of Liverpool|
Biological and Environmental Sciences
University of Liverpool
Westlakes Scientific Consulting Ltd
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