| Characterization of (241)Am and (134)Cs bioaccumulation in the king scallop Pecten maximus: investigation via three exposure pathways. | |
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MedLine Citation:
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PMID: 21392867 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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In order to understand the bioaccumulation of (241)Am and (134)Cs in scallops living in sediments, the uptake and depuration kinetics of these two elements were investigated in the king scallop Pecten maximus exposed via seawater, food, or sediment under laboratory conditions. Generally, (241)Am accumulation was higher and its retention was stronger than (134)Cs. This was especially obvious when considering whole animals exposed through seawater with whole-body concentration factors (CF(7d)) of 62 vs. 1, absorption efficiencies (A(0l)) of 78 vs. 45 for seawater and biological half-lives (T(b½l)) of 892 d vs. 22 d for (241)Am and (134)Cs, respectively. In contrast, following a single feeding with radiolabelled phytoplankton, the assimilation efficiency (AE) and T(b½l) of (134)Cs were higher than those of (241)Am (AE: 28% vs. 20%; T(b½l): 14 d vs. 9 d). Among scallop tissues, the shells always contained the higher proportion of the total body burden of (241)Am whatever the exposure pathway. In contrast, the whole soft parts presented the major fraction of whole-body burden of (134)Cs, which was generally associated with muscular tissues. Our results showed that the two radionuclides have contrasting behaviors in scallops, in relation to their physico-chemical properties. |
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Authors:
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Marc Metian; Michel Warnau; Jean-Louis Teyssié; Paco Bustamante |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-8 |
Journal Detail:
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Title: Journal of environmental radioactivity Volume: - ISSN: 1879-1700 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8508119 Medline TA: J Environ Radioact Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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International Atomic Energy Agency, Marine Environment Laboratories, 4, Quai Antoine Ier, MC-98000, Principality of Monaco, Monaco; Littoral Environnement et Sociétés (LIENSs), UMR 6250, CNRS-Université de La Rochelle, 2 rue Olympe de Gouges, F-17042 La Rochelle Cedex 01, France. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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