Plutonium in intertidal coastal and estuarine sediments in the Northern Irish Sea

Aston, S.R.; Assinder, David; Kelly, Mike

doi:10.1016/0272-7714(85)90031-9

Cited by 41 publications

(13 citation statements)

References 19 publications

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“…A contribution from global fallout can be excluded due to the measured 238 Pu/ 239(40) Pu activity ratios (Table 1). The value for this origin is 0.024 AE 0.004 (Hardy et al, 1973) and the obtained activity ratios are 0.246 at the surface and 0.187 in the deepest investigated layer which is in agreement with the data from Aston et al (1985) for Irish Sea intertidal sediments.…”

Section: Resultssupporting

confidence: 89%

Determination of U, Pu and Am isotopes in Irish Sea sediment by a combination of AMS and radiometric methods

Srncik¹,

Hrnecek²,

Steier³

et al. 2011

Journal of Environmental Radioactivity

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Section: Resultssupporting

confidence: 89%

Determination of U, Pu and Am isotopes in Irish Sea sediment by a combination of AMS and radiometric methods

Srncik¹,

Hrnecek²,

Steier³

et al. 2011

Journal of Environmental Radioactivity

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“…7). These results confirm the well-established path for radionuclides from the EISMB to the WISMB through the physical migration of contaminated particles and dissolved transport (Kershaw et al, 1984;Aston et al, 1985;Mitchell et al, 1999;Charlesworth et al, 2006). Similarly, despite their reservations, Kershaw et al (1990) successfully established a correlation between downcore radionuclide levels and discharge rates for 241 Am and 137 Cs in particular.…”

Section: Sellafield Discharges and Core Relationshipssupporting

confidence: 80%

“…In the EISMB, attempts at matching core profiles with Sellafield discharges using 239,240 Pu/ 238 Pu quotients were unsuccessful (Kershaw et al, 1990 and references therein). This challenge could be attributed to the effects of bioturbation, chemical conditions within the seabed, or even intra-basinal sediment erosion and deposition (Aston et al, 1985;Kershaw et al, 1990). Kershaw et al (1990), however, focused on a previously dredged harbour (namely Senhouse Dock, Mary Port Harbour) that was undisturbed by bioturbation.…”

Section: Regional and Human Settingsmentioning

confidence: 99%

Record of anthropogenic impact on the Western Irish Sea mud belt

et al. 2015

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Record of Anthropogenic Impact on the Western Irish Sea Mud Belt Highlights We investigate 5 cores from the Irish Sea using a multi-proxy approach  We assess multibeam echosounder and backscatter data from the same area  We analyse these cores for anthropogenic radionuclides using gamma spectrometry  Downcore radionuclide activity was related to known output levels from Sellafield  The impact of trawling was found to result in significant amounts of sediment loss

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“…For instance, generally, the finer a sediment the greater its concentration of both natural and anthropogenic pollutants (e.g. its trace metal concentration Salomons and Forstner, 1980;Thorne and Nickless, 1981;Loring, 1990), radionuclide content (Aston et al, 1985;Bonnett et al, 1988;Oldfield et al, 1993;Clifton et al, 1997Clifton et al, , 1999McCubbin et al, 2000) or polychlorinated biphenyls (PCBs) quantity (Klamer et al, 1990;Camacho-Ibar and McEvoy, 1996). Typically, this is due to finer grained sediments possessing larger specific surface areas, surface charges and cation exchange capacities, which enhance the extent of their preferential chemical adsorption.…”

Section: Introductionmentioning

confidence: 99%

Use of mineral magnetic concentration data as a particle size proxy: A case study using marine, estuarine and fluvial sediments in the Carmarthen Bay area, South Wales, U.K.

Booth

Walden

Neal

et al. 2005

Science of The Total Environment

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Compositional (non-magnetic) data can correlate strongly with particle size, which deems it appropriate as a particle size proxy and, therefore, a reliable means of normalising analytical data for particle size effects. Previous studies suggest magnetic concentration parameters represent an alternative means of normalising for these effects and, given the speed, low-cost and sensitivity of the measurements may, therefore, offer some advantages over other compositional signals. In this work, contemporary sediments from a range of depositional environments have been analysed with regard to their mineral magnetic concentration and textural characteristics, to observe if the strength and nature of the relationship identified in previous studies is universal. Our data shows magnetic parameters (v LF , v ARM and SIRM) possess contrasting relationships with standard textural parameters for sediment samples collected from marine (Carmarthen Bay), estuarine (Gwendraeth Estuary) and fluvial (Rivers Gwendraeth Fach and Gwendraeth Fawr) settings. Magnetic concentrations of sediments from both the marine and estuarine environments are highly influenced by the magnetic contribution of finer particle sizes; Gwendraeth Fawr River sediments are influenced by the magnetic contribution of coarser particle sizes, while sediments from the Gwendraeth Fach River are not influenced significantly by any variations in textural properties. These results indicate mineral magnetic measurements have considerable potential as a particle size proxy for particular sedimentary environments, which in certain instances could be useful for geochemical, sediment transport, and sediment provenance studies. However, the data also highlight the importance of fully determining the nature of the relationship between sediment particle size and magnetic properties before applying mineral magnetic data as a particle size proxy. D

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Plutonium in intertidal coastal and estuarine sediments in the Northern Irish Sea

Cited by 41 publications

References 19 publications

Determination of U, Pu and Am isotopes in Irish Sea sediment by a combination of AMS and radiometric methods

Determination of U, Pu and Am isotopes in Irish Sea sediment by a combination of AMS and radiometric methods

Record of anthropogenic impact on the Western Irish Sea mud belt

Use of mineral magnetic concentration data as a particle size proxy: A case study using marine, estuarine and fluvial sediments in the Carmarthen Bay area, South Wales, U.K.

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