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462037 
Journal Article 
Solid partitioning and solid-liquid distribution of Po-210 and Pb-210 in marine anoxic sediments: roads of Cherbourg at the northwestern France 
Connan, O; Boust, D; Billon, G; Solier, L; Rozet, M; Bouderbala, S 
2009 
Yes 
Journal of Environmental Radioactivity
ISSN: 0265-931X
EISSN: 1879-1700 
ELSEVIER SCI LTD 
OXFORD 
100 
10 
905-913 
English 
19631425 
WOS:000269992500015 
A sequential extraction protocol has been used to determine the solid-phase partition of Po-210 and Pb-210 in anoxic marine sediment from the roads of Cherbourg (France) in the central English Channel. Measurements were also obtained in pore waters, in which Po-210 activities range between 1 and 20 mBq L-1 and Pb-210 activities between 2.4 and 3.8 mBq L-1, with highest activities in the topmost layer. These activities are higher than in seawater, suggesting that sediment act as a source of both Po-210 and Pb-210 for overlying water. The Po-210 profile in the pore waters is apparently correlated with those obtained for Fe, Mn and SO42-, suggesting an influence of early diagenetic processes on the Po-210 solid-liquid distribution. in the sediment, Po-210 is predominantly bound to organic matter or chromium reducible sulphides, and residuals (clay minerals and refractory oxides). Our results indicate that Po-210 is not significantly bound to AVS, i.e. acid volatile sulphides: bioturbation could play a role by the early redistribution of Po-210 bound to acid volatile sulphides in the sediment. Po-210, Pb-210 and Pb exhibit differences in terms of distribution, probably due to a different mode of penetration in the sediment. This work provides information on solid and liquid distribution of Po-210 and Pb-210 in marine sediment. These data are very scarce in the litterature. (C) 2009 Elsevier Ltd. All rights reserved. 
Polonium; Lead; Anoxic sediments; Pore waters; Sequential extraction; analysis; irish sea sediments; sequential extraction; lake-sediments; speciation; water; fractionation; organisms; plutonium; polonium; channel