Orienterend onderzoek naar Polonium-210 en andere natuurlijke radionucliden in Nederlandse aquatische ecosystemen

2.50
Hdl Handle:
http://hdl.handle.net/10029/256993
Title:
Orienterend onderzoek naar Polonium-210 en andere natuurlijke radionucliden in Nederlandse aquatische ecosystemen
Authors:
Koster HW; Marwitz PA; Berger GW; Weers AW van; Hagel P; Niewenhuize J
Other Titles:
Reconnaissance investigations of Po-210 and other natural radionuclides in Dutch coastal ecosystems.
Abstract:
Abstract niet beschikbaar

In 1985/1986 reconnaissance investigations were carried out of Po-210, Pb-210, Ra-226, Th-230 of the U-238 decay series, and of Th-232 and its daughter Th-228. In the lower reaches of the Rhine, the Westerschelde and the Hoogoven(furnace)-channel concentrations were markedly elevated. The average Po-210 concentrations of these waters were between 3 and 4 Bq.m-3 dissolved in water, between 200 and 500 Bq.kg-1 in dry suspended matter, between 300 and 400 Bq.kg-1 in mussels dry matter. These elevated levels could be ascribed to emissions on these waters by the phospate rock and the iron ore-processing industries. In bottom sediment of waterways or of docks close to these industries Pb-210 and Po-210 concentrations varied from 150 to 750 Bq.kg-1 dry sediment. The lowest average Po-210 concentrations were found in the Oosterschelde: 0,8 Bq.m-3 dissolved in water, 70 Bq.kg-1 in dry suspended matter, 100 Bq.kg-1 in mussels dry matter. It was found that several organisms incorporate Po-210 more strongly than the other natural radionuclides. Po-210 also contributes most to the radiation burden caused by the consumption of fish products, in particular of mussels and shrimps. Consumption of 1 kg.a-1 of shrimps from the Oosterschelde or from the coastal area causes respectively a radiation exposure of 10 muSv.a-1 or 30 muSv.-1. The study points out the necessity for further studies of the emissions of Po-210 and other U-238 daughters and their dispersal and/or accumulation in the aquatic environment. Furthermore it is important to identify critical groups with respect tot the radiation exposure cuased by the consumption of mussels and other fish products, and the contribution to this radiation exposure by the industries.
Issue Date:
31-Aug-1990
URI:
http://hdl.handle.net/10029/256993
Additional Links:
http://www.rivm.nl/bibliotheek/rapporten/248476004.html
Type:
Onderzoeksrapport
Language:
nl
Sponsors:
DGM/S
Appears in Collections:
RIVM official reports

Full metadata record

DC FieldValue Language
dc.contributor.authorKoster HW-
dc.contributor.authorMarwitz PA-
dc.contributor.authorBerger GW-
dc.contributor.authorWeers AW van-
dc.contributor.authorHagel P-
dc.contributor.authorNiewenhuize J-
dc.date.accessioned2012-12-12T14:55:09Z-
dc.date.available2012-12-12T14:55:09Z-
dc.date.issued1990-08-31-
dc.identifier248476004-
dc.identifier.urihttp://hdl.handle.net/10029/256993-
dc.description.abstractAbstract niet beschikbaarnl
dc.description.abstractIn 1985/1986 reconnaissance investigations were carried out of Po-210, Pb-210, Ra-226, Th-230 of the U-238 decay series, and of Th-232 and its daughter Th-228. In the lower reaches of the Rhine, the Westerschelde and the Hoogoven(furnace)-channel concentrations were markedly elevated. The average Po-210 concentrations of these waters were between 3 and 4 Bq.m-3 dissolved in water, between 200 and 500 Bq.kg-1 in dry suspended matter, between 300 and 400 Bq.kg-1 in mussels dry matter. These elevated levels could be ascribed to emissions on these waters by the phospate rock and the iron ore-processing industries. In bottom sediment of waterways or of docks close to these industries Pb-210 and Po-210 concentrations varied from 150 to 750 Bq.kg-1 dry sediment. The lowest average Po-210 concentrations were found in the Oosterschelde: 0,8 Bq.m-3 dissolved in water, 70 Bq.kg-1 in dry suspended matter, 100 Bq.kg-1 in mussels dry matter. It was found that several organisms incorporate Po-210 more strongly than the other natural radionuclides. Po-210 also contributes most to the radiation burden caused by the consumption of fish products, in particular of mussels and shrimps. Consumption of 1 kg.a-1 of shrimps from the Oosterschelde or from the coastal area causes respectively a radiation exposure of 10 muSv.a-1 or 30 muSv.-1. The study points out the necessity for further studies of the emissions of Po-210 and other U-238 daughters and their dispersal and/or accumulation in the aquatic environment. Furthermore it is important to identify critical groups with respect tot the radiation exposure cuased by the consumption of mussels and other fish products, and the contribution to this radiation exposure by the industries.en
dc.description.sponsorshipDGM/S-
dc.format.extent232 p-
dc.language.isonl-
dc.relation.ispartofRIVM Rapport 248476004-
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/248476004.html-
dc.subject16nl
dc.subjectradionuclidennl
dc.subjectu-238nl
dc.subjectra-226nl
dc.subjectpb-210nl
dc.subjectpo-210nl
dc.subjectth-isotopes; industrienl
dc.subjectfosfaatertsnl
dc.subjectijzerertsnl
dc.subjectwaternl
dc.subjectswevend slibnl
dc.subjectwaterbodem; scheldenl
dc.subjectnieuwe waterwegnl
dc.subjectwaddenzeenl
dc.subjectnoordzeenl
dc.titleOrienterend onderzoek naar Polonium-210 en andere natuurlijke radionucliden in Nederlandse aquatische ecosystemennl
dc.title.alternativeReconnaissance investigations of Po-210 and other natural radionuclides in Dutch coastal ecosystems.en
dc.typeOnderzoeksrapport-
dc.date.updated2012-12-12T14:55:10Z-
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