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Plutonium remobilization in a humic-rich lake
Örebro University, Department of Natural Sciences.
Man-Technology-Environment Research Centre, Örebro University, Örebro, Sweden.
Örebro University, Department of Natural Sciences.ORCID iD: 0000-0002-2104-4593
Department of Radiation Physics, Lund University Hospital, Lund, Sweden; Risø National Laboratory, Roskilde, Denmark.
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2007 (English)In: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 277, no 1, p. 265-268Article in journal (Refereed) Published
Abstract [en]

Fresh water from Lake Svartsjön, Sweden, was collected and four fractions were prepared: (1) adsorption on DEAE, (2) flocculation with Ca2+, (3) co-precipitation with Fe hydrous oxide and (4) co-precipitation with Mn hydrous oxide. The plutonium level in the lake is 65 fg/l (222 μBq/l), measured by ICP-QMS and ICP-SFMS. Pronounced accumulation in fractions (1) (34%) and (2) (66%), combined with observed levels of organic matter indicate that plutonium is predominantly associated with organic matter. Measurements of isotopic ratios indicate that 77% of the plutonium originates from weapons testing and the remaining appears to originate from the Chernobyl accident.

Place, publisher, year, edition, pages
2007. Vol. 277, no 1, p. 265-268
National Category
Environmental Sciences Chemical Sciences
Research subject
Enviromental Science
Identifiers
URN: urn:nbn:se:oru:diva-3234DOI: 10.1007/s10967-008-0741-4ISI: 000257318800041Scopus ID: 2-s2.0-46449100013OAI: oai:DiVA.org:oru-3234DiVA, id: diva2:137478
Available from: 2007-02-13 Created: 2007-02-13 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Rapid analysis of actinide isotopes using quadrupole ICP-MS for emergency preparedness and environmental monitoring
Open this publication in new window or tab >>Rapid analysis of actinide isotopes using quadrupole ICP-MS for emergency preparedness and environmental monitoring
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Transuranium elements in the environment are mainly derived from nuclear weapons testing and the nuclear fuel cycle. Of growing concern are illicit nuclear trafficking and the threat of terror acts. The development of rational methods, for environmental monitoring and for tracing sources of nuclear and radioactive materials in the environment, is constantly required.

Traditionally, the actinides have been determined by radiometric techniques. These analyses can be time consuming for elements at low concentrations and with long half-lives. This thesis addresses the determination of actinides, especially plutonium, in environmental samples with ICP-QMS (inductively coupled plasma quadrupole mass spectrometry). The ICP-QMS instrument was equipped with an USN (ultrasonic nebuliser), which proved to be a successful combination for the determination of plutonium at low concentrations in acidified solutions after separation with anion exchange. The detection limit for plutonium was in the range 10-30 pg/l with a RSD of 1-10%. The suitability of chemical separation was evaluated for anion exchange, liquid-liquid-extraction and extraction chromatography.

The outlined procedure, including sample dissolution, chemical separation and analysis, for determination of actinides in environmental matrices proved to be accurate and reliable. Quality assurance of the procedure was performed during an intercomparison exercise and with reference materials. The detection accuracy has also been validated with α-spectrometry and ICP-SFMS. The procedure has been applied to saline sediments and fresh water sediments as well as several fresh water matrices.

Place, publisher, year, edition, pages
Örebro: Örebro universitetsbibliotek, 2007. p. 67
Series
Örebro Studies in Environmental Science, ISSN 1650-6278 ; 10
Keywords
quadrupole ICP-MS, actinides, plutonium, preparedness
National Category
Natural Sciences Chemical Sciences Environmental Sciences
Research subject
Enviromental Science
Identifiers
urn:nbn:se:oru:diva-947 (URN)978-91-7668-529-7 (ISBN)
Public defence
2007-03-06, Hörsal 3, Örebro universitet, Fakultetsgatan 1, Örebro, 10:15
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Available from: 2007-02-13 Created: 2007-02-13 Last updated: 2017-10-18Bibliographically approved

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Greis, ChristinaDuker, AndersAllard, Bert

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