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Journal of Environmental Radioactivity

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https://www.readbyqxmd.com/read/28431375/radioactivity-in-wastes-generated-from-shale-gas-exploration-and-production-north-eastern-poland
#1
Paweł Jodłowski, Jan Macuda, Jakub Nowak, Chau Nguyen Dinh
In the present study, the K-40, U-238, Ra-226, Pb-210, Ra-228 and Th-228 activity concentrations were measured in 64 samples of wastes generated from shale gas exploration in North-Eastern Poland. The measured samples consist of drill cuttings, solid phase of waste drilling muds, fracking fluids, return fracking fluids and waste proppants. The measured activity concentrations in solid samples vary in a wide range from 116 to around 1100 Bq/kg for K-40, from 14 to 393 Bq/kg for U-238, from 15 to 415 Bq/kg for Ra-226, from 12 to 391 Bq/kg for Pb-210, from a few Bq/kg to 516 Bq/kg for Ra-228 and from a few Bq/kg to 515 Bq/kg for Th-228...
April 18, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28431374/atmospheric-fallout-radionuclides-in-peatland-from-southern-poland
#2
Tomasz Mróz, Edyta Łokas, Justyna Kocurek, Michał Gąsiorek
Two peat profiles were collected in a peat bog located in Southern Poland and their geochronology were determined using (210)Pb, (238,239+240)Pu and (137)Cs radiometric techniques. The (210)Pb chronologies were established using the constant rate of supply model (CRS) and are in good agreement with the Pu isotopes and (137)Cs time markers. Maximum activities of Pu isotopes were found at a depth corresponding to the early 1960s, which is the period characterized by the maximum nuclear weapon tests. The results showed that the (210)Pb method is the most accurate technique for the determination age and accumulation rate of a peat...
April 18, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28427815/the-swedish-radiological-environmental-protection-regulations-applied-in-a-review-of-a-license-application-for-a-geological-repository-for-spent-nuclear-fuel
#3
Pål Andersson, Karolina Stark, Shulan Xu, Maria Nordén, Björn Dverstorp
For the first time, a system for specific consideration of radiological environmental protection has been applied in a major license application in Sweden. In 2011 the Swedish Nuclear Fuel & Waste Management Co. (SKB) submitted a license application for construction of a geological repository for spent nuclear fuel at the Forsmark site. The license application is supported by a post-closure safety assessment, which in accordance with regulatory requirements includes an assessment of environmental consequences...
April 17, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28414936/east-urals-radioactive-trace-dose-dependent-functional-metabolic-effects-in-the-myocardium-of-the-pygmy-wood-mouse-apodemus-uralensis-taking-into-account-population-size
#4
Nataĺya A Orekhova, Makar V Modorov
The population dynamics, radiometric data and biochemical parameters (concentrations of total lipids, proteins, DNA and RNA, activity of succinate dehydrogenase, glucose phosphate isomerase and catalase, as well as lipid peroxidation level) in the myocardium of the pygmy wood mouse (Apodemus uralensis Pall., 1811) inhabiting the area of the East Urals Radioactive Trace (EURT) were analyzed. The functional-metabolic radiation effects as a result external and internal exposure to (137)Cs and (90)Sr (unweighted total dose rate 0...
April 14, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28412579/equilibrium-thermodynamic-and-kinetic-investigations-for-biosorption-of-uranium-with-green-algae-cladophora-hutchinsiae
#5
Esra Bağda, Mustafa Tuzen, Ahmet Sarı
Removal of toxic chemicals from environmental samples with low-cost methods and materials are very useful approach for especially large-scale applications. Green algae are highly abundant biomaterials which are employed as useful biosorbents in many studies. In the present study, an interesting type of green algae, Cladophora hutchinsiae (C. hutchinsiae) was used for removal of highly toxic chemical such as uranium. The pH, biosorbent concentration, contact time and temperature were optimized as 5.0, 12 g/L, 60 min and 20 °C, respectively...
April 13, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28411426/thoron-mitigation-system-based-on-charcoal-bed-for-applications-in-thorium-fuel-cycle-facilities-part-2-development-characterization-and-performance-evaluation
#6
K Sudeep Kumara, B K Sahoo, J J Gaware, B K Sapra, Y S Mayya, N Karunakara
Exposure due to thoron ((220)Rn) gas and its decay products in a thorium fuel cycle facility handling thorium or (232)U/(233)U mixture compounds is an important issue of radiological concern requiring control and mitigation. Adsorption in a flow-through charcoal bed offers an excellent method of alleviating the release of (220)Rn into occupational and public domain. In this paper, we present the design, development, and characterization of a Thoron Mitigation System (TMS) for industrial application. Systematic experiments were conducted in the TMS for examining the (220)Rn mitigation characteristics with respect to a host of parameters such as flow rate, pressure drop, charcoal grain size, charcoal mass and bed depth, water content, and heat of the carrier gas...
April 12, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28411425/thoron-mitigation-system-based-on-charcoal-bed-for-applications-in-thorium-fuel-cycle-facilities-part-1-development-of-theoretical-models-for-design-considerations
#7
B K Sahoo, K Sudeep Kumara, N Karunakara, J J Gaware, B K Sapra, Y S Mayya
Regulating the environmental discharge of (220)Rn (historically known as thoron) and its decay products from thorium processing facilities is important for protection of environment and general public living in the vicinities. Activated charcoal provides an effective solution to this problem because of its high adsorption capacity to gaseous element like radon. In order to design and develop a charcoal based Thoron Mitigation System, a mathematical model has been developed in the present work for studying the (220)Rn transport and adsorption in a flow through charcoal bed and estimating the (220)Rn mitigation factor (MF) as a function of system and operating parameters...
April 12, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28408134/norm-contaminated-area-identification-using-radionuclides-activity-concentration-pattern-in-a-soil-profile
#8
Bogusław Michalik
According to the requirements set by European BSS the exposure of humans and biota to ionizing radiation originating from natural radionuclides but under anthropogenically changed conditions should be managed within the same regulatory framework as other practices. Such situation creates the strong needs to have a reliable method to distinguish whether the particular case of natural radioactivity occurrence has resulted from human activity or it is pure natural phenomenon. In case of current activity of particular NORM industry there are no doubts however, in case of a legacy site, such question becomes crucial...
April 10, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28407570/the-application-of-illite-supported-nanoscale-zero-valent-iron-for-the-treatment-of-uranium-contaminated-groundwater
#9
C Jing, S Landsberger, Y L Li
In this study, nanoscale zero valent iron I-NZVI was investigated as a remediation strategy for uranium contaminated groundwater from the former Cimarron Fuel Fabrication Site in Oklahoma, USA. The 1 L batch-treatment system was applied in the study. The result shows that 99.9% of uranium in groundwater was removed by I-NZVI within 2 h. Uranium concentration in the groundwater stayed around 27 μg/L, and there was no sign of uranium release into groundwater after seven days of reaction time. Meanwhile the release of iron was significantly decreased compared to NZVI which can reduce the treatment impact on the water environment...
April 10, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28395156/phosphogypsum-recycling-in-the-building-materials-industry-assessment-of-the-radon-exhalation-rate
#10
M P Campos, L J P Costa, M B Nisti, B P Mazzilli
Phosphogypsum can be classified as a Naturally Occurring Radioactive Material (NORM) residue of the phosphate fertilizer industry. One of the main environmental concerns of its use as building material is the radon exhalation. The aim of this study is to measure the radon exhalation rate from plates and bricks manufactured with phosphogypsum from three installations of the main Brazilian producer, Vale Fertilizantes, in order to evaluate the additional health risk to dwellers. A simple and reliable accumulator method involving a PVC pipe sealed with a PVC pipe cover commercially available with CR-39 radon detector into a diffusion chamber was used for measuring radon exhalation rate from phosphogypsum made plates and bricks...
April 7, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28395155/short-term-variability-of-gamma-radiation-at-the-arm-eastern-north-atlantic-facility-azores
#11
S M Barbosa, P Miranda, E B Azevedo
This work addresses the short-term variability of gamma radiation measured continuously at the Eastern North Atlantic (ENA) facility located in the Graciosa island (Azores, 39N; 28W), a fixed site of the Atmospheric Radiation Measurement programme (ARM). The temporal variability of gamma radiation is characterized by occasional anomalies over a slowly-varying signal. Sharp peaks lasting typically 2-4 h are coincident with heavy precipitation and result from the scavenging effect of precipitation bringing radon progeny from the upper levels to the ground surface...
April 7, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28395154/meta-analysis-of-depleted-uranium-levels-in-the-balkan-region
#12
Larisa Besic, Imer Muhovic, Adna Asic, Amina Kurtovic-Kozaric
In recent years, contradicting data has been published on the connection between the presence of depleted uranium and an increased cancer incidence among military personnel deployed in the Balkans during the 1992-1999 wars. This has led to numerous research articles investigating possible depleted uranium contamination of the afflicted regions of the Balkan Peninsula, namely Bosnia & Herzegovina, Serbia, Kosovo and Montenegro. The aim of this study was to collect data from previously published reports investigating the levels of depleted uranium in the Balkans and to present the data in the form of a meta-analysis...
April 7, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28390309/thirty-years-after-chernobyl-long-term-determination-of-137-cs-effective-half-life-in-the-lichen-stereocaulon-vesuvianum
#13
F Savino, M Pugliese, M Quarto, P Adamo, F Loffredo, F De Cicco, V Roca
It has been widely shown that nuclear fallout includes substances, which accumulate in organisms such as crustaceans, fish, mushrooms and lichens, helping to evaluate the activity concentration of contaminants accumulated on a long time. In this context, radiocaesium deposited in soil following the Chernobyl accident on 26 April 1986 is known to have remained persistently available for plant uptake in many areas of Europe. Studies on the lichen Stereocaulon vesuvianum show the plant's high capacity to retain radionuclides from the substrate and the air...
April 5, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28390308/developing-a-food-web-based-transfer-factor-of-radiocesium-for-fish-whitespotted-char-salvelinus-leucomaenis-in-headwater-streams
#14
Md Enamul Haque, Takashi Gomi, Masaru Sakai, Junjiro N Negishi
We developed a food web-based transfer factor (TFweb) to study contaminant movements from multiple prey items to a predator based on the dietary contributions of prey items with their respective contamination levels. TFweb was used to evaluate the transfer of (137)Cs into whitespotted char (Salvelinus leucomaenis) from the trophic structure of a stream-riparian ecosystem in headwater streams draining a Japanese cedar forest. We also examined the applicability of this method by comparing sites with different contamination levels but similar surrounding environments in Fukushima and Gunma...
April 5, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28389036/use-of-different-surface-covering-materials-to-enhance-removal-of-radiocaesium-in-plants-and-upper-soil-from-orchards-in-fukushima-prefecture
#15
Mamoru Sato, Hiroko Akai, Yuichi Saito, Tsugiko Takase, Hidetoshi Kikunaga, Nobuhito Sekiya, Tsutomu Ohtsuki, Katsuhiko Yamaguchi
The effectiveness of a decontamination methodology whereby herbaceous plants were grown through different materials covering the soil surface followed by subsequent removal of the material, associated plant tissues and attached soil on (137)Cs removal from soil was evaluated. Revegetation netting sown with Kentucky bluegrass and white clover had a high effectiveness in (137)Cs removal when rolling up the plants, roots, and rhizosphere soil approximately 6 months after sowing. The removal rate was lower when there was higher (137)Cs vertical migration down the soil profile...
April 4, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28388500/atmospheric-dispersion-of-radon-around-uranium-mill-tailings-of-the-former-pridneprovsky-chemical-plant-in-ukraine
#16
Ivan V Kovalets, Christian Asker, Alexander V Khalchenkov, Christer Persson, Tatyana V Lavrova
Simulations of atmospheric dispersion of radon around the uranium mill tailings of the former Pridneprovsky Chemical Plant (PChP) in Ukraine were carried out with the aid of two atmospheric dispersion models: the Airviro Grid Model and the CALMET/CALPUFF model chain. The available measurement data of radon emission rates taken in the territories and the close vicinity of tailings were used in simulations. The results of simulations were compared to the yearly averaged measurements of concentration data. Both models were able to reasonably reproduce average radon concentration at the Sukhachivske site using averaged measured emission rates as input together with the measured meteorological data...
April 4, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28380392/temporal-changes-in-radiocesium-contamination-derived-from-the-fukushima-dai-ichi-nuclear-power-plant-accident-in-oceanic-zooplankton-in-the-western-north-pacific
#17
Minoru Kitamura, Makio C Honda, Yasunori Hamajima, Yuichiro Kumamoto, Michio Aoyama, Hajime Kawakami, Tatsuo Aono, Miho Fukuda, Yoshihisa Mino
We investigated temporal changes of the contamination of oceanic zooplankton with radiocesium ((134)Cs and (137)Cs) derived from the Fukushima Dai-ichi Nuclear Power Plant accident one month to three years after the accident at subarctic and subtropical stations (1900 and 900-1000 km from the plant, respectively) in the western North Pacific. The maximum activity concentrations of (137)Cs in zooplankton were two orders of magnitude higher than the pre-accident level. In the first four months after the accident, the activity concentrations of radiocesium in subtropical zooplankton decreased rapidly, but no similar change was observed at the subarctic station...
April 2, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28365477/reference-natural-radionuclide-concentrations-in-australian-soils-and-derived-terrestrial-air-kerma-rate
#18
R Kleinschmidt
Sediment from drainage catchment outlets has been shown to be a useful means of sampling large land masses for soil composition. Naturally occurring radioactive material concentrations (uranium, thorium and potassium-40) in soil have been collated and converted to activity concentrations using data collected from the National Geochemistry Survey of Australia. Average terrestrial air kerma rate data are derived using the elemental concentration data, and is tabulated for Australia and states for use as baseline reference information...
March 30, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28364711/distribution-of-natural-and-anthropogenic-radionuclides-in-northwest-mediterranean-coastal-sediments
#19
Sang-Han Lee, Pavel P Povinec, John R M Chisholm, Isabelle Levy, Juan-Carlos Miquel, Jung-Suk Oh
The distribution of radionuclides in NW Mediterranean coastal sediments, and the processes controlling their abundance were investigated in three cores taken near the island of Porquerolles and one offshore Monaco. The sediments collected near Porquerolles were strongly anoxic due to diagenetic processes involved in the decomposition of organic matter, whereas they transitioned from oxic to anoxic at a depth of 4 cm beneath the seawater interface at Monaco. Organic carbon (OC) was more abundant in sediments at Porquerolles (by about a factor of 3-5) than at Monaco and elsewhere in the coastal NW Mediterranean...
March 29, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28359973/comments-to-special-issue-geogenic-radiation-and-its-potential-use-for-developing-the-geogenic-radon-map
#20
LETTER
Ilia Yarmoshenko, Georgy Malinovsky, Aleksey Vasilyev
No abstract text is available yet for this article.
March 27, 2017: Journal of Environmental Radioactivity
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