Artificial radionuclides in aquatic plants of the Yenisei River in the area affected by effluents of a Russian plutonium complex

Bolsunovsky, A. Ya.

doi:10.1023/b:aeco.0000020950.43944.ec

Cited by 34 publications

(33 citation statements)

References 3 publications

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“…As a sample comparison was used by the standard "SRS-1A" (RF). To perform the analysis we have conducted measurements of two standard samples of "SG-1A" (albitized granite) (RF) and "SG-1T" (trapp) (RF) containing (mass %): SiO 2 O -4.14 and 0.69 in "SG-1A" and "SG-1T", respectively.…”

Section: Measurement Proceduresmentioning

confidence: 99%

“…The Yenisei River is one of the environments affected by the conti-nuous radioactive contamination. The floodplain soils, sediments, aquatic plants, and water of the Yenisei River have been found to contain various artificial radionuclides, both activation products and ones produced at the radiochemical plant of the Mining-and-Chemical Combine (MCC) of Rosatom [1][2][3]. There is a Mining and Chemical Combine of Rosatom (MCC) on the left bank of the Yenisei, 50 km downstream from Krasnoyarsk.…”

Section: Introductionmentioning

confidence: 99%

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The relationship of mineral and geochemical composition to artificial radionuclide partitioning inYenisei river sediments downstream frommining-and-chemical combine rosatom

Bondareva¹,

Svetlana²

2011

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Section: Measurement Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The relationship of mineral and geochemical composition to artificial radionuclide partitioning inYenisei river sediments downstream frommining-and-chemical combine rosatom

Bondareva¹,

Svetlana²

2011

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“…The Mining-and-Chemical Combine (MCC), which has been producing weapons-grade plutonium since 1958, is situated on the east bank of the Yenisei River, 60 km down of the city of Krasnoyarsk. The MCC has been in operation for many years, contaminating the Yenisei River basin with radionuclides [1][2][3][4][5][6][7]. Previously levels of artificial radionuclides were mostly measured in samples of the floodplain soils; just several measurements have been done in sediments [2,[4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Radionuclide speciation in sediments of the Yenisei River

Bolsunovsky

2011

Radioprotection

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Abstract. The examination of sediment samples collected from the Yenisei River revealed the presence of artificial radionuclides characteristic of radioactive discharges from the MCC facility: isotopes of europium ( 152 Eu, 154 Eu, and 155 Eu), cesium ( 137 Cs and 134 Cs), 60 Co, 90 Sr, and transuranium elements. Radionuclide concentrations in sediment layers remained high as far as 240 km downstream of the MCC. The vertical distribution of radionuclides in sediment cores was very complex, and down-core variations were due to different amounts of radionuclides released by the MCC and due to variations in the hydrologic conditions in the river. Sequential extraction performed on samples of the upper layers of the sediment core showed different degrees of potential environmental availability of artificial radionuclides: the amounts of extracted 90 Sr, 152 Eu and 241 Am were the largest (60-80% of initial activity), then followed 60 Co (30%), 238,239,240 Pu (15-30%), and, last, 137 Cs (5-15%). The distribution of 238 U among chemical fractions of sediments was similar to that of 60 Co and 238,239,240 Pu: 30-40% of 238 U initial activity was extracted. In a few samples, 241 Am was present in the unextractable form, which may be accounted for by the presence of microparticles of the reactor fuel.

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“…Another source is nuclear medicine, which uses 99m Tc (decaying into 99 Tc) although its contribution is much less important than the other sources. The Mining-and-Chemical Combine (MCC) situated in the Krasnoyarskii Krai [1] includes a radiochemical plant for reprocessing nuclear fuel and, thus, one can assume that large amounts of 99 Tc are contained in radioactive waste and are partly released into the Yenisei River ecosystem with MCC effluents. Investigation of 99 Tc behavior in model ecosystems can yield data for predicting its behavior in the Yenisei River.…”

Section: Introductionmentioning

confidence: 99%

Bioavailability of⁹⁹Tc to a macrophyte of the Yenisei River

Bondareva

Bolsunovsky

2009

Radioprotection

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Abstract.The experiments on accumulation of 99 Tc by Elodea biomass showed that 99 Tc activity concentration can reach 120 ± 6 Bq/g, with the concentration factor for 99 Tc 2700 ± 500 L/kg. In experiments on 99 Tc release, over 504 h about 82% of the total 99 Tc activity was released into the water from plant biomass; most of 99 Tc was released within the first 192 h. Results of chemical fractionation of the biomass show that 99 Tc contained in biomass was mainly concentrated in the exchangeable and the adsorbed fractions (83%). Thus, the data obtained using chemical fractionation of biomass confirmed the experimental data on 99 Tc release, which suggested that most of the biomass-bound 99 Tc was adsorbed on the biomass surface. 99 Tc tightly bound to Elodea biomass (fractions of organics and mineral residue) constituted just 17% of the total 99 Tc activity. Decreased illumination of Elodea shoots during the experiment did not cause any reduction in 99 Tc activity concentration or concentration factor. Results of chemical fractionation of the biomass grown under lower illumination conditions show that the percentage of 99 Tc tightly bound to Elodea biomass (fractions of organics and mineral residue) decreased while the 99 Tc of the adsorbed fractions decreased. Our results and data reported by other authors suggest that some part of 99 Tc activity can be bioavailable to living organisms and that the portion of bioavailable 99 Tc can be determined by a number of factors.

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Artificial radionuclides in aquatic plants of the Yenisei River in the area affected by effluents of a Russian plutonium complex

Cited by 34 publications

References 3 publications

The relationship of mineral and geochemical composition to artificial radionuclide partitioning inYenisei river sediments downstream frommining-and-chemical combine rosatom

The relationship of mineral and geochemical composition to artificial radionuclide partitioning inYenisei river sediments downstream frommining-and-chemical combine rosatom

Radionuclide speciation in sediments of the Yenisei River

Bioavailability of⁹⁹Tc to a macrophyte of the Yenisei River

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Artificial radionuclides in aquatic plants of the Yenisei River in the area affected by effluents of a Russian plutonium complex

Cited by 34 publications

References 3 publications

The relationship of mineral and geochemical composition to artificial radionuclide partitioning inYenisei river sediments downstream frommining-and-chemical combine rosatom

The relationship of mineral and geochemical composition to artificial radionuclide partitioning inYenisei river sediments downstream frommining-and-chemical combine rosatom

Radionuclide speciation in sediments of the Yenisei River

Bioavailability of99Tc to a macrophyte of the Yenisei River

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Bioavailability of⁹⁹Tc to a macrophyte of the Yenisei River