Determination of /sup 239,240/Pu in bottom sediments of the Baltic Sea
We present a technique for determining the /sup 239,240/Pu content, using /sup 236/Pu as the monitor of chemical yield, in samples of soils and bottom sediments - objects of the external environment. Plutonium is extracted from the matrix material by leaching with a mixture of concentrated acids HCl-HNO/sub 3/, after which it is separated by ion-exchange methods. After electrodeposition onto stainless steel discs the activity of the nuclides of plutonium is measured by the method of alpha-spectrometry. The average chemical yields during the analysis of the samples was 40-60%, the relative standard deviation was 10%, and the lower limit of detectability was 0.3 Bq. We present results of the determination of the /sup 239,240/Pu content in surface samples of bottom sediments from the Gulf of Finland and that past of the Baltic Sea which adjoins the territory of the USSR. It is found that the unit activity of /sup 239,240/Pu in the bottom sediments varies within the limits of 0.4-1.2 Bq/kg and lies at the global level. Global genesis of /sup 239,240/Pu in the bottom sediments of the Gulf of Finland and the open parts of the Baltic Sea is also confirmed by the values which are found for the ratios /sup 238/Pu//sup 239,240/Pu and /sup 239,240/Pu//sup 137/Cs.
- OSTI ID:
- 6174631
- Journal Information:
- Sov. Radiochem. (Engl. Transl.); (United States), Vol. 30:2; Other Information: Translated from Radiokhimiya; 30: No. 2, 262-267(Mar-Apr 1988)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BALTIC SEA
RADIATION MONITORING
PLUTONIUM 239
RADIOCHEMICAL ANALYSIS
PLUTONIUM 240
SEA BED
SEDIMENTS
ALPHA SPECTRA
CESIUM 137
ELECTRODEPOSITION
HYDROCHLORIC ACID
ION EXCHANGE
ION EXCHANGE MATERIALS
ISOTOPE RATIO
LEACHING
NITRIC ACID
PLUTONIUM 236
PLUTONIUM 238
PURIFICATION
RADIOECOLOGICAL CONCENTRATION
SAMPLE PREPARATION
SAMPLING
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALI METAL ISOTOPES
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM ISOTOPES
CHEMICAL ANALYSIS
DEPOSITION
DISSOLUTION
ECOLOGICAL CONCENTRATION
ELECTROLYSIS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HEAVY NUCLEI
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ISOTOPES
LYSIS
MATERIALS
MONITORING
NUCLEI
ODD-EVEN NUCLEI
PLUTONIUM ISOTOPES
QUANTITATIVE CHEMICAL ANALYSIS
RADIOISOTOPES
SEAS
SEPARATION PROCESSES
SPECTRA
SURFACE COATING
SURFACE WATERS
YEARS LIVING RADIOISOTOPES
520300* - Environment
Aquatic- Radioactive Materials Monitoring & Transport- (1989)
400102 - Chemical & Spectral Procedures
400105 - Separation Procedures