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Wyświetlanie 1-15 z 32
Tytuł:
Ocena sytuacji radiologicznej w Polsce po awarii elektrowni jądrowej w Fukushimie
The assessment of radiation situation in Poland after the Fukushima nuclear power plant breakdown
Autorzy:
Dołhańczuk-Śródka, A.
Ziembik, Z.
Wacławek, M.
Powiązania:
https://bibliotekanauki.pl/articles/126502.pdf
Data publikacji:
2011
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
Fukushima
reaktor
radionuklidy
reactor
radionuclides
Opis:
W piątek 11 marca 2011 r. na wschód od japońskiej wyspy Honsiu doszło do potężnego trzęsienia ziemi o sile 9 stopni w skali Richtera. Było to trzecie co do siły trzęsienie ziemi, które nawiedziło nasz glob od momentu rejestracji tego typu zjawisk. Epicentrum trzęsienia znajdowało się w odległości ok. 130 km od tej wyspy. Jego następstwem było powstanie olbrzymiej fali tsunami o wysokości przekraczającej miejscami 10 metrów. W wyniku trzęsienia, a następnie niszczycielskiego działania fali tsunami doszło do awarii w japońskiej elektrowni Fukushima I (Fukushima Dai-ichi), wyposażonej w 6 bloków z reaktorami BWR (Boiling Water Reactor). Awaria była jedną z największych w historii światowej energetyki jądrowej. Jej wielkość oceniono na 7 stopień (w siedmiostopniowej skali INES), a więc podobnie jak awarię w Czarnobylu w kwietniu 1986 roku. Już około środy 23 marca 2011 r. nad Polską zarejestrowano pierwsze masy powietrza znad elektrowni Fukushima, zawierające niewielkie ilości radionuklidów pochodzenia sztucznego, głównie promieniotwórczego jodu 131I, ale także 134Cs oraz 137Cs. Po 1 kwietnia 2011 r. aktywności tych radionuklidów w atmosferze zaczęły zmniejszać się, osiągając po około 2 tygodniach poziom sprzed awarii. Pomimo względnie dużego wzrostu aktywności radionuklidów w atmosferze ich wpływ na dawkę promieniowania jonizującego pochłoniętego przez organizm człowieka był nieznaczny.
A powerful earthquake of 9 degrees on the Richter scale struck off the eastern coast of Japan’s Honsiu island on Friday, 11th March 2011. It has been the third largest earthquake that struck the Earth since such phenomena started to be recorded. The epicentre of the earthquake was located approximately 130 km from the island. Its consequence was the formation of a giant tsunami wave of height exceeding 10 metres. The earthquake followed by the devastating activity of tsunami wave led in consequence to a breakdown at the Japanese Fukushima I (Fukushima Dai-ichi) nuclear power plant, consisting of 6 boiling water reactors (BWR). It was one of the worst breakdowns in the history of global nuclear power industry. It was rated at level 7 (on the seven-level INES scale), the same as the Chernobyl disaster in April 1986. The first air layers from above the Fukushima power plant were observed over Poland already on Wednesday (23rd March 2011). They contained small amounts of artificial radionuclides, mainly radioactive 131I, but also 134Cs and 137Cs.
Źródło:
Proceedings of ECOpole; 2011, 5, 2; 519-524
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radioactivity of ground-level air in Poland in 1998-1999. Results from ASS-500 stations network
Autorzy:
Bysiek, M.
Biernacka, M.
Lipiński, P.
Powiązania:
https://bibliotekanauki.pl/articles/148059.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
air
high-volume samplers
radionuclides
Opis:
The results of measurements of aerosol samples in the 1998-1999 period in the monitoring network of the ASS-500 stations in Poland are presented. The concentration of 137Cs remained at a rather low level during these two years. Higher levels resulting from the Algeciras release in southern Spain were identified in the first week of June 1998 at four stations situated in southern Poland. Higher concentrations of 137Cs were also observed during some other weeks of the presented period, but their origin has not been identified. The radionuclides of natural and antrophogenic origin were at their normal levels of activity. For comparison, the results from some other European stations are presented.
Źródło:
Nukleonika; 2001, 46, 4; 171-173
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technologically enhanced naturally occurring radioactive materials in the oil industry (TENORM).
Autorzy:
Bou-Rabee, F.
Al-Zamel, A. Z.
Al-Fares, R. A.
Bem, H.
Powiązania:
https://bibliotekanauki.pl/articles/146466.pdf
Data publikacji:
2009
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
oil industry
radiation exposure
radionuclides
Opis:
A large amount of naturally occurring radioactive materials in the form of by-products or waste is produced annually by the growing activity of the oil and gas industry. Solid scale, sludge and produced water are typical residues contaminated with natural radionuclides from the uranium and thorium series, particularly 226Ra and 228Ra. The observed specific activities of these radionuclides are in the ranges up to 3700 kBq/kg and up to 168 kBq/kg for solid scale and sludge, respectively. The average activities of both radionuclides exceed the exemption level of 10,000 Bq/kg recommended by IAEA safety standards. This means that TENORM wastes from the oil industry may generate radiation exposure levels which require attention and continuous monitoring during some routine operations in this industry. This exposure is mostly caused by external gamma radiation coming from the 226Ra radionuclide and its progenies.
Źródło:
Nukleonika; 2009, 54, 1; 3-9
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The airborne radioactivity and electrical properties of ground level air
Autorzy:
Mysłek-Laurikainen, B.
Matul, M.
Mikołajewski, S.
Trzaskowska, H.
Kubicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/148122.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
aerosols
air monitoring
radioelectricity
radionuclides
Opis:
The data presented in this work are the result of systematic measurements of radionuclide concentrations in air, collected with an ASS-500 high volume air sampler of the ground air monitoring network supervised by the Central Laboratory of Radiological Protection. Sampling has been done since March 1991. Simultaneously, the routine complex meteorological observations were performed. In particular, the electrical properties of ground level atmospheric air were studied with measurements of electrical field intensity, positive and negative conductivity of air and density of vertical current. The airborne 7Be concentration changes similarly to the electrical conductivity of air, while other isotopes, antropogenic or originating from the ground are correlated with dust and other meteorological factors like watering and wind.
Źródło:
Nukleonika; 2001, 46, 4; 195-197
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sorption of selected radionuclides from liquid radioactive waste by sorbents of biological origin : the alkaline earth alginates
Autorzy:
Fuks, Leon
Oszczak-Nowińska, Agata
Powiązania:
https://bibliotekanauki.pl/articles/2055671.pdf
Data publikacji:
2021
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
alginates
biosorption
radionuclides
caesium
strontium
americium
Opis:
The sorption of 241Am3+, 85Sr2+ and 137Cs+ by calcium, strontium and barium alginates has been studied under different operation conditions. The most prominent adsorption was found in the pH range of 5–6 for all systems, even if the observed dependence on the acidity of the solution was small. The most favourable time for the adsorption process was found to be about 2 h for calcium alginate and 4 h for the other two sorbents.
Źródło:
Nukleonika; 2021, 66, 4; 153--158
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vertical distribution of 137Cs, 210Pb, 226Ra and 239,240Pu in bottom sediments from the Southern Baltic Sea in the years 1998-2000
Autorzy:
Suplińska, M.
Powiązania:
https://bibliotekanauki.pl/articles/147171.pdf
Data publikacji:
2002
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Baltic Sea
contamination
radionuclides
sedimentation rate
Opis:
This paper presents vertical distribution of 137Cs, 226Ra and 239,240Pu in bottom sediments collected from the Southern Baltic Sea in the years 1998-2000. In the southern part of Baltic Sea the highest concentrations of 137Cs and 239,240Pu were observed at the Gulf of Gdansk. Deposition of 137Cs ranged from 1990š402 Bq m-2 in the Bornholm Basin to 3260š820 Bq m-2 in the Gulf of Gdansk. Depositions of 239,240Pu in the Bornholm Basin were 28.1-30.4 Bq m-2 and in Gulf of Gdansk 162-174 Bq m-2. The concentration peaks of long-lived radionuclides, owing to the sedimentation processes, show the maximum fallout period in different sediment layers. The observed differences in distribution of radiocaesium and plutonium along the profile confirm two main sources of contamination - Chernobyl fallout for 137Cs and global fallout in case of 239,240Pu. In chosen core samples from the Gdansk Basin vertical distribution of 210Pb concentrations were determined. Evaluated sedimentation rates based on decrease of unsupported 210Pb ranged in the Gdansk Basin from 1.9 to 2.3 mm year-1. Calculations based on 239,240Pu peaks show sedimentation rate, in the range from 1.6-2.2 mm year-1 for P110 region.
Źródło:
Nukleonika; 2002, 47, 2; 45-52
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The correlation between the meteorological conditions and the concentration of radionuclides in the ground layer of atmospheric air
Autorzy:
Krajny, E.
Ośródka, L.
Wojtylak, M.
Michalik, B.
Skowronek, J.
Powiązania:
https://bibliotekanauki.pl/articles/148116.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
atmospheric air
meteorology
neural network
radionuclides
Opis:
The main goal of this work was to find correlation between the concentrations of radionuclides in outdoor air and the meteorological conditions like: air temperature, atmospheric pressure, wind velocity and amount of precipitation. Because the sampling period of radionuclides concentrations in air was relatively long (7 days), the average levels of meteorological parameters have been calculated within the same time. Data of radionuclide concentrations and meteorological data have been analyzed in order to find statistical correlation. The regression analysis and one of the AI methods, known as neural network, were applied. In general, analysis of the gathered data does not show any strong correlation between the meteorological conditions and the concentrations of radionuclides in air. A slightly stronger correlation we found for radionuclides with relatively short half-lives. The only positive correlation has been found between the Be-7 concentration and air temperature (at the significance level á=0.05). In our opinion, the lack of correlation was caused by a too long sampling time in measurements of radionuclides in outdoor air (a whole week). Results of the analysis received by means of the artificial neuron network are better. We were able to find certain groups of meteorological conditions, related with the corresponding concentrations of particular radionuclides in air. Preliminary measurements of radon progeny concentration support the thesis that the link between changes of meteorological parameters and concentrations of radionuclides in ambient air must exist.
Źródło:
Nukleonika; 2001, 46, 4; 189-194
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The natural radioactivity of the Carpathian national parks and radon evaluation
Autorzy:
Maslyuk, V. T.
Symkanich, O. I.
Svatyuk, N. I.
Parlag, O. O.
Sukharev, S. M.
Powiązania:
https://bibliotekanauki.pl/articles/971501.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Carpathians
radionuclides
soils
depth content
radon
Opis:
The results of the low-background gamma spectrometric measurements of protected mountain areas (Zacharovanyy Kray, Chorne Bahno, Ihthyological Preserve Rika and Uzhanskij National Natural Park) in the region of Primeval Beech Forests of the Transcarpathia, Ukraine, are presented. The distances between sampling points in a single protected area were in the range of 200–400 m in elevation of 300 m; probes were taken from the surface, from depth 20 cm and more than 50 cm. The proposed sampling scheme allows one to investigate the radionuclide concentration in protected area’s soils, their distribution on/near the mountain ridges and migration in depth (0–50 cm). We also investigate the infl uence the soils’ pH on the contents and the migration of nuclides. The obtained data allow us to study the statistical regularities between the sampling points along and down mountain ridges on the base of their radionuclide content. These results are important for evaluating the radon content/distribution and developing standards in the radionuclide content of the soil Carpathian region.
Źródło:
Nukleonika; 2016, 61, 3; 351-356
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Chemical Amelioration of Solonetzic Soils on the Presence of Heavy Metals and Radionuclides in Soil Profile
Autorzy:
Anatolievna, Guzeeva Svetlana
Powiązania:
https://bibliotekanauki.pl/articles/124832.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
phosphogypsum
amelioration
consequence
heavy metals
radionuclides
Opis:
The article considers the results pertaining to the influence of solonetzic soils chemical amelioration on the presence and redistribution of heavy metals and radionuclides in meter profile of soils. Meliorative procedures were carried out 45 years ago. Phosphogypsum has been used as chemical ameliorant up to 90-s on the solonetzic soils of Tyumen region. It is a by-product of phosphates production. The objective aimed at revealing possible negative consequences connected with the introduction of the chemical elements associated with phosphogypsum. The studies showed that phosphogypsum introduction contributes to some increase in the content of active forms of heavy metals (zinc Zn, copper Cu, cadmium Cd and lead Pb) in soil. However, critical values are achieved only by active lead Pb. The evaluation of radioactive state of meadow crusted solonetzic soils after carrying out of meliorative procedures (for the same period) on the content of isotopes of thorium-232 (Th-232), calium-40 (K-40), radium-226 (Ra-226), caesium-137 (Cs-137) and strontium-90 (Sr-90) indicated that redistribution of radionuclides after chemical melioration does not cause a negative change of radiation background. Vibrations in the soil profile are connected with various initial concentration in rock formations or weathering detritus. Specific effective activity (Аeff ≤ 370 Bq/kg) testifies to the soils being studied and absence of their additional introduction with introduced doses of phosphogypsum.
Źródło:
Journal of Ecological Engineering; 2019, 20, 5; 179-183
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of probiotics in the xenobiotic detoxification therapy
Autorzy:
Urban, P.
Kuthan, R.
Powiązania:
https://bibliotekanauki.pl/articles/147297.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
probiotics
detoxifiction therapy
radionuclides
heavy metals
mycotoxins
Opis:
Many applications of probiotics have been described to date. In this paper, it is hypothesized that probiotic microorganisms can also be used to decrease the xenobiotics intake in humans. The use of probiotic bacteriae (e.g. strains of Lactobacillus sp. and Bifidobacterium sp.) and yeasts (Saccharomyces sp.) gives the opportunity for detoxification of various elements and compounds, considered as contaminants, directly in the lumen of human intestine. Some of these microorganisms are known to accumulate cesium, strontium and heavy metals to a great extent and also bind mycotoxins. Certainly, during the up-coming years, their native or genetically modified strains will be a part of treatment protocols in detoxification therapy. The utilization of probiotics, in the both therapy and nutrition of people living in the countries suffering from high food contamination, could result in the reduction of annual xenobiotic dose to be incorporated in their organisms.
Źródło:
Nukleonika; 2004, 49,suppl.1; 43-45
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applied radiotracer techniques for studying pollutant bioaccumulation in selected marine organisms (jellyfish, crabs and sea stars)
Autorzy:
Fowler, S.
Teyssié, J.
Cotret, O.
Danis, B.
Rouleau, C.
Warnau, M.
Powiązania:
https://bibliotekanauki.pl/articles/147253.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radiotracers
bioaccumulation
metals
radionuclides
PCB
marine invertebrates
Opis:
Obtaining specific information on contaminant biokinetics in marine biota is often necessary for properly interpreting monitoring data on trace contaminant levels in bioindicator species living under varying environmental conditions. Radiotracers have been employed in laboratory experiments to assess the uptake, distribution and retention of selected heavy metals and PCB congeners in three potential marine bioindicators occupying different ecological niches in the coastal zone. Pelagic and benthic jellyfish readily accumulated Co, Ag, Zn, Cd, 137Cs and 241Am from both water and food and retained them with biological half-lives (Tb1/2) ranging from a few days to several weeks. Zinc and silver were accumulated to the greatest degree (CF ~ 4 ´ 102), with benthic jellyfish having a greater affinity for metals than the pelagic species. Results from light–dark experiments indicate that the enhanced metal uptake in the benthic jellyfish is due to the presence of endosymbiotic photosynthetic zooxanthellae situated in the arms of organisms. Shore crabs ingesting Ag, a sewage-related contaminant, readily accumulated the metal with male crabs assimilating some 71% and female crabs 51% of the Ag from their food. Moreover, the assimilated fraction of Ag remained virtually immobile in their tissues as evidenced by an extremely long Tb1/2 for depuration of 7.3 years. Sea stars exposed to 14C-labelled PCB congener #153 in sea water accumulated the congener mainly in the body wall and podia reaching lipid weight CFs that ranged between approximately 2 x 10 5 to 4 x 10 5. In contrast, following exposure in radio-labelled sediments, the corresponding PCB transfer factors in the same tissues were much lower, viz., 3 x 10 2 to 5 x 10 2. Nevertheless, regardless of the exposure mode, CFs of PCB in the other tissues (digestive system, gonads, pyloric and rectal caeca) were consistently one to two orders of magnitude lower, an observation which suggests that sea star body wall and podia could serve as target tissues in biomonitoring studies assessing these toxic compounds.
Źródło:
Nukleonika; 2004, 49, 3; 97-100
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multibarrier system preventing migration of radionuclides from radioactive waste repository
Autorzy:
Olszewska, W.
Miśkiewicz, A.
Zakrzewska-Kołtuniewicz, G.
Lankof, L.
Pająk, L.
Powiązania:
https://bibliotekanauki.pl/articles/148431.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
engineered barrier
migration
radionuclides
repository
radioactive waste
Opis:
Safety of radioactive waste repositories operation is associated with a multibarrier system designed and constructed to isolate and contain the waste from the biosphere. Each of radioactive waste repositories is equipped with system of barriers, which reduces the possibility of release of radionuclides from the storage site. Safety systems may differ from each other depending on the type of repository. They consist of the natural geological barrier provided by host rocks of the repository and its surroundings, and an engineered barrier system (EBS). The EBS may itself comprise a variety of sub-systems or components, such as waste forms, canisters, buffers, backfi lls, seals and plugs. The EBS plays a major role in providing the required disposal system performance. It is assumed that the metal canisters and system of barriers adequately isolate waste from the biosphere. The evaluation of the multibarrier system is carried out after detailed tests to determine its parameters, and after analysis including mathematical modeling of migration of contaminants. To provide an assurance of safety of radioactive waste repository multibarrier system, detailed long term safety assessments are developed. Usually they comprise modeling of EBS stability, corrosion rate and radionuclide migration in near fi eld in geosphere and biosphere. The principal goal of radionuclide migration modeling is assessment of the radionuclides release paths and rate from the repository, radionuclides concentration in geosphere in time and human exposure to ionizing radiation.
Źródło:
Nukleonika; 2015, 60, No. 3, part 2; 557-563
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specific Activity of Radionuclides in Soils Disturbed by Forest Fires
Autorzy:
Popovych, Vasyl
Henyk, Yaroslav
Gapalo, Andriy
Bosak, Pavlo
Popovych, Nataliya
Powiązania:
https://bibliotekanauki.pl/articles/2105292.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
forest fire
fire danger
radionuclides
soil pollution
Opis:
Fires in natural ecosystems have a detrimental effect on all biota components. In the global scale, many scientific studies of prominent scientists are devoted to this topic. It should be noted that scientists have always been interested in the influence of thermal destruction of soil genetic horizons on the specific activity of radionuclides. Most of these studies began after the Chernobyl (1986) and Fukushima (2011) radiation disasters. The conducted research is focused on the specific activity of radionuclides due to the thermal effects of fires in natural ecosystems. It has been established that the edaphotopes affected by fires are naturally restored causing the restoration of soil formation processes. The specific activity of radionuclides decreases with the duration of the ground fire. Comparing the obtained data with the regulatory documentation, it was found that they do not exceed the minimum significant activity of radionuclides in the workplace. However, the increased activity of radionuclides in soils has a detrimental effect on the ecological condition and flora and fauna development. During the fire season in natural ecosystems and forests, careless handling of fire should be avoided and preventive measures should be taken to inform the public about the harmful effects of wildfire.
Źródło:
Journal of Ecological Engineering; 2022, 23, 6; 265--270
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sorption of Sr-85 and Am-241 from liquid radioactive wastes by alginate beads
Autorzy:
Oszczak, A.
Fuks, L.
Powiązania:
https://bibliotekanauki.pl/articles/147934.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
sorption
radionuclides
calcium alginate
barium alginate
strontium alginate
Opis:
The paper reports the adsorption of strontium(II) and americium(III) from aqueous solutions onto calcium alginate (CaA), barium alginate (BaA) and strontium alginate (SrA) beads. Adsorption process was studied in batch experiments as a function of the initial pH of the solution and the contact time. All sorbents were examined by the termogravimetric analysis (TG). Laboratory obtained spherical beads of CaA, BaA and SrA seem to be good metal sorbents from liquid radioactive wastes. A contact time of about 4 h and neutral pH of the initial aqueous solution have been proposed to be optimum conditions for Sr-85 and Am-241 removal from the contaminated solutions using alginate sorbents. Laboratory obtained beads of CaA, BaA and SrA are characterized by the decontamination factor (DF) equal to 85% for Sr(II) and 90% for Am(III).
Źródło:
Nukleonika; 2015, 60, No. 4, part 2; 927-931
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radionuclides of iron (55Fe), nickel (63Ni),polonium (210Po), uranium (234U, 235U, 238U) and plutonium (238Pu, 239+240Pu, 241Pu) in Poland and Baltic Sea environment
Autorzy:
Skwarzec, B.
Strumińska, D.
Boryło, A.
Powiązania:
https://bibliotekanauki.pl/articles/148606.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radionuclides
iron
nickel
polonium
uranium
plutonium
Baltic Sea
Opis:
The paper presents the results of determination of natural [polonium (210Po), uranium (234U, 235U, 238U)] and artificial radionuclides [iron (55Fe), nickel (63Ni), and plutonium (238Pu, 239+240Pu, 241Pu)] in Poland and the southern Baltic Sea ecosystem as well as the recognition of their accumulation process in the trophic chain. All presented results is a summary of long lasting studies realized by the present authors. Results of this study indicated that the principal sources of 55Fe and 63Ni in the Baltic Sea environment is the release from Swedish nuclear power plants. Investigation on the polonium 210Po and plutonium 238Pu, 239+240Pu and 241Pu concentration in Baltic and land biota revealed that these radionuclides are strongly accumulated by some species. Moreover, it was found that fish, mushrooms, cigarettes constitutes important sources of 210Po for people. The Baltic Sea algae, benthic animals and fish concentrate uranium only to a small degree. In Baltic sediments, the concentration of uranium increases with core depth and it is connected with the diffusion of 234U, 235U and 238U from sediments. The values of 234U/238U activity ratio in the sediments indicated that the reduction process of U(VI) to U(IV) and the removing of autogenic uranium from seawater to sediments in the Gdańsk Deep constitutes a small part only.
Źródło:
Nukleonika; 2006, 51,suppl.2; 45-51
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
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