タグ「137Cs」
Title: Soil-to-mushroom transfer of 137Cs, 40K, alkali–alkaline earth element and heavy metal in forest sites of Izmir, Turkey
Author: Özlem Karadeniz, Günseli Yaprak
Reference: Journal of Radioanalytical and Nuclear Chemistry , April 2011, Volume 288, Issue 1, pp 261-270
DOI: 10.1007/s10967-010-0908-7
Keywords: Soil to mushroom transfer, 137Cs, 40K, Alkali–alkaline earth elements, Heavy metals
Abstract: The present work is devoted to an investigation on the soil to mushroom transfer parameters for 137Cs and 40K radionuclides, as well as for some stable elements and heavy metals. The results of transfer factors for 137Cs and 40K were within the range of 0.06–3.15 and 0.67–5.68, respectively and the most efficiently transferred radionuclide was 40K. The TF values for 137Cs typically conformed to a lognormal distribution, while for 40K showed normal distribution. Statistically significant correlations between 137Cs soil to mushroom transfer factors and agrochemical soil properties have been revealed. Although the concentration ratios varied within the species, the most efficiently transferred elements seems to have been K, followed by Rb, Zn, Cu, Cd, S, Cs and Hg.
ＵＲＬ：http://link.springer.com/article/10.1007/s10967-010-0908-7
Title: 90Sr, 238U, 234U, 137Cs, 40K and 239/240Pu in Emmental type cheese produced in different regions of Western Europe
Author: P. Froidevaux, , J.-J. Geering, L. Pillonel, J.-O. Bosset, J.-F. Valley
Reference: Journal of Environmental Radioactivity, Volume 72, Issue 3, 2004, Pages 287–298
DOI: http://dx.doi.org/10.1016/S0265-931X(03)00179-6
Keywords: Strontium-90; Cheese; Uranium isotopes; Milk-to-cheese transfer; Food authenticity
Abstract: A method is presented for the determination of 90Sr and uranium in Emmental type cheese collected in dairy plants from different European countries. Results display a significant correlation (r=0.708, Student t-test=6.02) between the 90Sr content of the cheese and the altitude of grazing. The highest 90Sr activity is 1.13 Bq kg−1 of cheese and the lowest is 0.29 Bq kg−1. Uranium activity is very low with a highest 238U value of 27 mBq kg−1. In addition, 234U/238U ratio shows a large enrichment in 234U for every location. Without any significant indication of the geographic origin of the cheese, this enrichment is believed to be due to the geological features of the pasture, soil and underground water. These results tend to prove that the contamination of milk by uranium originates principally from the water that the cows drink instead of the forage. This finding may have a great importance in models dealing with dairy food contamination by radionuclides following a nuclear accident. Also, the 90Sr content and to a lesser extent the 234U/238U ratio could be used to trace the authenticity of the origin of the cheese. 137Cs activity is lower than the detection limit of 0.1 Bq kg−1 in all the samples collected (n=20). Based on natural 40K activity in cheese (15–21 Bq kg−1), the decontamination factor for the alkaline cations from milk to cheese is about 20. Plutonium activity stays below the detection limit of 0.3 mBq kg−1.
ＵＲＬ：http://www.sciencedirect.com/science/article/pii/S0265931X03001796
Title: 137Cs, 40K, alkali–alkaline earth element and heavy metal concentrations in wild mushrooms from Turkey
Author: Özlem Karadeniz, Günseli Yaprak
Reference: Journal of Radioanalytical and Nuclear Chemistry , September 2010, Volume 285, Issue 3, pp 611-619
DOI: 10.1007/s10967-010-0575-8
Keywords: Mushroom, 137Cs, 40K, Internal dose, Alkali–alkaline earth elements, Heavy metals
Abstract: In 2002, an extensive study was performed in forest sites of Izmir. This first study results led on the one hand, to quantify of 137Cs and 40K concentration in mushrooms collected in the Izmir region and to a first evaluation of dose in people due to the ingestion of radionuclide-contaminated mushrooms. The mushroom concentration values varied over a wide range from below detection limit to 401 ± 4 Bq kg−1 (dry wt) for 137Cs. The 40K concentration values obtained for different species of mushrooms ranged from 588 ± 26 Bq kg−1 to 2024 ± 63 Bq kg−1 (dry wt). The annual effective dose values due to mushroom ingestion for 137Cs are lower than the ICRP-2007’s reference level value of 1 mSv for “existing” exposure situation. Inductively coupled plasma-mass spectrometry was used to measure many alkali–alkaline earth elements and heavy metals in mushroom samples. The relationships among the concentrations of 137Cs and the stable elements were presented and the occurrence of metals in mushrooms was evaluated.
ＵＲＬ：http://link.springer.com/article/10.1007/s10967-010-0575-8
Title: First measurements of 238Pu and 238Pu/137Cs activity ratio in Montenegro soil
Author: Nevenka M. Antovic, Perko Vukotic, Nikola Svrkota, Sergey K. Andrukhovich
Reference: Journal of Radioanalytical and Nuclear Chemistry , July 2012, Volume 293, Issue 1, pp 299-302
DOI: 10.1007/s10967-012-1661-x
Keywords: 238Pu activity, 238Pu/137Cs ratio, Soil, Montenegro
Abstract: Plutonium-238 (238Pu) activity concentrations in soil samples from Montenegro (six samples from three localities) have been measured for the first time. The 238Pu/137Cs activity ratio was determined on the basis of alpha and gamma-spectrometric measurements, and found to be with an average of 0.0006 and standard deviation of 0.0003. By using the activity ratios determined in the present study, 238Pu activity concentrations were estimated for three localities in the central: one in the northern, and two in the eastern part of Montenegro.
ＵＲＬ：http://link.springer.com/article/10.1007/s10967-012-1661-x
Title: On peculiarities of vertical distribution of 239,240Pu, 238Pu and 137Cs activity concentrations and their ratios in lake sediments and soils
Author: B. Lukšienė, E. Maceika, N. Tarasiuk, E. Koviazina, V. Filistovič, Š. Buivydas, A. Puzas Reference: Journal of Radioanalytical and Nuclear Chemistry , February 2014
DOI: 10.1007/s10967-014-3026-0
Keywords: 238Pu, 239,240Pu, 137Cs, Origin, Lake sediments, Upland and flooded soils, Vertical profiles
Abstract: Distributions of 239,240Pu, 238Pu and 137Cs activity concentrations in the cores of sediments in the shallow lake, flooded and upland forest soils taken in the vicinity of Vilnius city were analyzed. The radiochemical, α-spectrometric and mass spectrometric methods were used for the plutonium evaluation and γ-spectrometry was used for the radiocesium evaluation. The only peak of enhanced radionuclide activity concentrations was determined for the lake bottom sediments, whereas vertical profiles of the radionuclide activity concentrations in flooded and upland forest soil cores were distinguished by two peaks. The obtained values of the activity concentration ratio 238Pu/239,240Pu and the isotopic ratio 240Pu/239Pu indicated that the global fallout was a source of plutonium in the investigated environment. Chernobyl-derived radiocesium was detected solely in the surface layers (2–11 cm) of the studied sample cores. The contribution of the Chernobyl deposits amounted to about 2.26, 6.11 and 20.9 % of the total radiocesium inventory in the bottom sediments, the upland soil and flooded soil, respectively.
ＵＲＬ：http://link.springer.com/article/10.1007/s10967-014-3026-0
Author: Tulina, Anastasia Sergeyevna
Reference: Pushchino 2002
Keywords: agroecology, nitrogen fertilizers, soil, 137Cs
Abstract: Aim: Revealing of reasons for increased accumulation of 137Cs by plants when applying nitrogen fertilizer on sod-podzolic sandy soils contaminated by Chernobyl fallout, and selection of optimum nitrogen fertilizer application system to provide a high yield of crops with a minimum accumulation of radioactive cesium.
URL:http://earthpapers.net/agroekologicheskie-aspekty-primeneniya-azotnyh-udobreniy-na-dernovo-podzolistyh-peschanyh-pochvah-zagryaznennyh-137-cs
Title:Average radiation doses to residents of the South Ukraine caused by the accident at the Chernobyl NPP
Author: Grigorieva L.I.
Reference: Journal: Radiation and Risk (Bulletin of the National Radiation and Epidemiological Registry), Year: 2011 Volume: 20 Issue: 3
Keywords:reconstruction, inhalation and oral intake of 131І, radioisotopes of cesium (137Cs; 134Cs), noble radioactive gases (85mKr; 133mXe), Effective dose, 06Ru, 103Ru, 141Ce, 144Ce, 95mNb, 132Te, 140Ln
Abstract: Results of retrospective reconstruction of average individual radiation doses got by residents of the South Ukraine due to exposure to radioactive fallouts from the Chernobyl NPP are given in the article. In the work radiometry, spectrometry and dosimetry data collected in the territory of Nikolev, Odessa, Kirovograd oblasts and Autonomous Republic of Crimea were used. The study was carried out by the Nikolaev Research Laboratory Larani in 1986 and later.
URL:http://cyberleninka.ru/article/n/srednie-dozy-oblucheniya-zhiteley-yuga-ukrainy-obuslovlennye-avariey-na-chaes
Title: Doses and risks from the water use received by the population of southwest areas of Bryansk region
Author: Katkova M.N.
Reference: Journal: Radiation and Risk (Bulletin of the National Radiation and Epidemiological Registry), Year: 2008, Volume: 17, Issue: 1
Keywords: exposure dose, water use, risk, radionuclides of 90 Sr and 137Cs, Chernobyl accident
Abstract: In the present work the estimation of risk for the population of southwest areas of Bryansk region exposed to radiation fallout after Chernobyl accident is carried out. The life risk of disease for the population of the specified areas is estimated by a cancer through a dose received from water use. The basic ways of radionuclide receipt in an organism of inhabitants of southwest areas of Bryansk region on a water chain are: an external exposure from polluted flood-land of water body, consumption of water from the sources of the drinking water supply located in the polluted zone, and consumption of fish caught from a local water body. As object of research the population living in area of Lake Kozhanovskoe is accepted. The contribution of radionuclides o f9 Sr and 137Cs in a total dose from water use is estimated. Priority sources of risk for the population from water use to which it is necessary to pay special attention at carrying out of protective actions in the specified territories are revealed.
URL:http://cyberleninka.ru/article/n/dozy-i-riski-ot-vodopolzovaniya-poluchaemye-naseleniem-yugo-zapadnyh-rayonov-bryanskoy-oblasti
Title: Estimation of the ratio of 90Sr and 137Cs activities in the Chernobyl depositions in the territory of the Russian Federation
Author: Ermilov A.P., Ziborov A.M.
Reference: Journal: Radiation and Risk (Bulletin of the National Radiation and Epidemiological Registry), Year: 2001 Issue: 12
Keywords: contamination, cesium-137, strontium-90
Abstract: Correlative relationship between activities of 90Sr to 137Cs in condenses of the Chernobyl fallouts on April 26, 1986 was detected. The ratio was estimated with the use of data of the Institute of Global Climate and Ecology of the State Committee of Hydrometeorology and Russian Academy of Sciences. The data derived from measurements of 90Sr, 137Cs and 239+240Pu in soil samples taken in Bryansk, Kaluga, Oriol and Ryazan regions in 1992. The contribution of the condensation of 90Sr in the soil samples of the Chernobyl fallout in Russia was found to be governing factor when specific activity of 137Cs was > 2000 Bq/kg.
URL:http://cyberleninka.ru/article/n/otsenka-otnosheniya-aktivnosti-90sr-k-aktivnosti-137cs-v-chernobylskih-vypadeniyah-na-territorii-rossiyskoy-federatsii
Title: Value and structure of radiation dose for emergency workers as a function of the radiation emergency mitigation phase and activity
Author: Meshkov N.A.
Reference: Journal: Radiation and Risk (Bulletin of the National Radiation and Epidemiological Registry), Year: 2009 Volume: 18 Issue: 1
Keywords: Chernobyl disaster, radionuclides, volumetric activity, entering organism, liquidators, the nature of work being performed, 137Cs content in organism, Radiation doses, radiation dose structure
Abstract: There was performed a research of the radiation dose size and radiation dose structure of those who participated in the elimination of the Chernobyl disaster consequences. It was established that the levels of 90Sr, 137Cs and 239Pu received by means of inhaling by the «liquidators» worked at the Chernobyl atomic power station site in June and July of 1986 did not exceed the limits set by radiation standards-76/87 of that time. The average radiation doses of the «liquidators» in 1986, 1987 and 1988 were 186, 98 and 47 mGy, respectively. The most dangerous exposure to radiation was received by those who participated in the decontamination of the third power generating unit of the Chernobyl atomic power station in June and July of 1986, their radiation doses being from 205,0±10,0 to 242,0±5,6 mGy. The body burden structure of the «liquidators» participated in the elimination in 1986 consisted of exposure radiation dose of external gamma irradiation (86 %), external beta irradiation (10 %) and internal irradiation caused by inhaling radionuclides (4 %). It was established that body burden was influenced by the following factors: the level of air and area radioactive contamination, duration of work in the contaminated areas, the nature of work being performed and personal protective equipment efficacy.
URL:http://cyberleninka.ru/article/n/velichina-i-struktura-doz-oblucheniya-likvidatorov-v-zavisimosti-ot-etapa-likvidatsii-posledstviy-radiatsionnoy-avarii-i-vida-rabot
