Temat: radionuclide - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Target preparation of RbCl on a copper substrate by sedimentation method for the cyclotron production of no-carrier-added 85Sr for endotherapy
Autorzy:: Sadeghi, M.
Alipoor, Z.
Kakavand, T.
Powiązania:: https://bibliotekanauki.pl/articles/148632.pdf
Data publikacji:: 2010
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: rubidium chloride
target
sedimentation
radionuclide
Opis:: 85Sr was produced via the 85Rb(p,n)85Sr reaction. Rubidium chloride deposition on copper substrate was carried out via the sedimentation method in order to produce strontium-85. Optimum conditions were achieved as a result of several repeated experiments with different amount of ethyl cellulose (EC) and acetone. 520 mg of RbCl, 208 mg of EC 4 mL of acetone were used to prepare a layer of enriched rubidium chloride of 11.69 cm2 area and 62.2 mg/cm2 thickness. Target quality control was done by a SEM photomicrograph and a thermal shock test. The deposited target was irradiated at a 20 ěA current and a 15 MeV proton beam for 30 min. No degradation was observed. The RbCl surface following bombardment was white, except the central area that was light brown and also without any crack or peeling off.
Źródło:: Nukleonika; 2010, 55, 3; 303-306
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: PRRT as an alternative method of treatment in patient with glucagonoma syndrome: A case report
Autorzy:: Popławska-Kita, A.
Szyszkowska, A.
Brelska, P.
Kowalczuk, M.
Szostek, A.
Popławski, Ł.
Siewko, K.
Szelachowska, M.
Kamiński, G.
Werel, D.
Górska, M.
Powiązania:: https://bibliotekanauki.pl/articles/1917699.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Medyczny w Białymstoku
Tematy:: Glucagonoma
tumor
peptide receptor radionuclide therapy
Opis:: Introduction: Glucagonoma is a rare pancreatic neuroendocrine tumor derived from alpha-cells of the islet of Langerhans. Due to oversecretion of glucagon it is associated with a characteristic paraneoplastic phenomenon, called glucagonoma syndrome, which consists of necrolytic migratory erythema (NME), weight loss, diabetes mellitus, diarrhea, normochromic normocytic anemia, deep vein thrombosis or pulmonary embolism and neuropsychiatric disturbances. Treatment modalities include surgical removal of tumor, somatostatin analogs and peptide receptor radionuclide therapy (PRRT). Case report: We present a case of 61-year-old woman diagnosed with glucagonoma in April 2012. Initially, body-caudal pancreatomy and resection of regional lymph nodes were performed. Five months after surgery, a PET-CT scan detected pathological mass with expression of somatostatin receptors in pancreatic body and metastases to regional lymph nodes. What is more, since April 2014 the patient had complained about persistent pruritus of the entire body. At present, due to the nonsurgical pancreatic mass and metastases she is treated with somatostatin analogs and PRRT. During this therapy the pruritus had decreased and currently there is no sign of cutaneous disease. Moreover, reduction of tumor size was obtained. Conclusions: PRRT may reduce tumor size and by reducing bothersome symptoms substantially improve the quality of life in patients with SSTR-positive tumors
Źródło:: Progress in Health Sciences; 2016, 6(1); 209-214
2083-1617
Pojawia się w:: Progress in Health Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The National Standard Unit of Radionuclide Activity and the related standards in Poland
Autorzy:: Chyliński, A.
Broda, R.
Radoszewski, T.
Powiązania:: https://bibliotekanauki.pl/articles/148541.pdf
Data publikacji:: 2003
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: standards
radionuclide
radioactivity
coincidence
iquid scintillator
Opis:: The idea of functioning and technical realization of the National Standard Unit of Radionuclide Activity established in Poland by President of the Central Office of Measures is presented in this paper. The Radioisotope Centre POLATOM has been appointed as depositary of that National Standard. The detection circuits as well as the absolute methods of measurements used to realize the standard unit are described. Application of a liquid scintillation technique was emphasized, and the determination accuracy of measurements has been presented. All kinds of the secondary standards, prepared in the RC POLATOM for application in isotope laboratories of nuclear medicine and in industrial and scientific centres, are related to the National Standard by a chain of presented comparisons. Relationship between the National Standard Unit of Radionuclide Activity and the international system of standards has been realized in the RC POLATOM by taking part in international comparisons of the measurement results.
Źródło:: Nukleonika; 2003, 48, 1; 51-55
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Compact cyclotrons for the production of tracers and radiopharmaceuticals
Autorzy:: Paans, A.
Powiązania:: https://bibliotekanauki.pl/articles/146155.pdf
Data publikacji:: 2003
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: positron emission tomography (PET)
cyclotron
radionuclide production
Opis:: Positron Emission Tomography (PET) is a method for determining biochemical and physiological processes in vivo in a quantitative manner. The most commonly used radionuclides are 11C, 13N, 15O and 18F, with respective half-lives of approximately 20 min, 10 min, 2 min, and 110 min. 18F labeled FDG (fluoro-2-deoxy-D-glucose) is now the most frequently used radiopharmaceutical and finds its application prominently in the field of oncology. Originally, the production of these radionuclides was performed with the existing accelerators, designed for nuclear physics, but with increasing interest in the PET methodology specially designed PET-production cyclotrons became available. The nuclear reactions involved are (p,n), (d,n), (p,a) and (d,a) and the thresholds for the nuclear reactions involved are 5 to 6 MeV. Based on these values and on other parameters, a proton 15 to 20 MeV cyclotron is often chosen. Since the half-life of a radionuclide limits the production time, the maximum beam current is an important parameter, together with the target construction, for the ultimate yield obtainable. In the development of special PET production cyclotrons, attention has also been paid to improve the extraction efficiency and the possibility of multiple extractions by designing negative ion cyclotrons. Commercial cyclotrons can often be acquired as an easy to operate integrated radionuclide production unit including targetry and some units. Regional FDG factories are nowadays being created to fulfil the demand for PET radiopharmaceutics. The possible choices in commercially available cyclotrons for the production of PET radionuclides will be discussed.
Źródło:: Nukleonika; 2003, 48,suppl.2; 169-172
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The inflow of 234U and 238U from the River Odra drainage basin to the Baltic Sea
Autorzy:: Skwarzec, B.
Tuszkowska, A.
Borylo, A.
Powiązania:: https://bibliotekanauki.pl/articles/47957.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Baltic Sea
Odra River
Polska
Szczecin Lagoon
concentration
drainage basin
inflow
natural radionuclide
radionuclide
trace element
uranium
water sample
Opis:: In this study the activity of uranium isotopes 234U and 238U in Odra river water samples, collected from October 2003 to July 2004, was measured using alpha spectrometry. The uranium concentrations were different in each of the seasons analysed; the lowest values were recorded in summer. In all seasons, uranium concentrations were the highest in Bystrzyca river waters (from 27.81±0.29 Bq m−3 of 234U and 17.82±0.23 Bq m−3 of 238U in spring to 194.76±3.43 Bq m−3 of 234U and 134.88 ± 2.85 Bq m−3 of 238U in summer). The lowest concentrations were noted in the Mała Panew (from 1.33±0.02 Bq m−3 of 234U and 1.06±0.02 Bq m−3 of 238U in spring to 3.52 ± 0.05 Bq m−3 of 234U and 2.59 ± 0.04 Bq m−3 of 238U in autumn). The uranium radionuclides 234U and 238U in the water samples were not in radioactive equilibrium. The 234U/238U activity ratios were the highest in Odra water samples collected at Głogów (1.84 in autumn), and the lowest in water from the Noteć (1.03 in winter and spring). The 234U/238U activity ratio decreases along the main stream of the Odra, owing to changes in the salinity of the river’s waters. Annually, 8.19 tons of uranium (126.29 GBq of 234U and 100.80 GBq of 238U) flow into the Szczecin Lagoon with Odra river waters.
Źródło:: Oceanologia; 2010, 52, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Ecological analysis of heavy metal and radioactivity potential of Holocene sediments in Iznik Lake
Autorzy:: Yumun, Zeki U.
Kam, Erol
Powiązania:: https://bibliotekanauki.pl/articles/146352.pdf
Data publikacji:: 2019
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: Iznik Lake
heavy metals
radionuclides
geochemical analyses
radionuclide determination
Opis:: In this study, the heavy metal and radioactive properties of Iznik Lake were investigated. Concentration values of the first (Ag, Bi, Mo, Sn, Se, Zn, As, B, Cd, Co, Cr, Cu, Ni, Pb, Pt and Sb) and second (Na, Mg, K, Ca, P, S, Fe, Al and Mn) group of elements in borehole 1 (BH-1) drilling did not show much variation from the top to the bottom of the drilling. Concentration values of the fi rst group of elements in borehole 2 (BH-2) drill samples decreased at higher levels of drilling. In addition, natural and anthropogenic radionuclides were measured by gamma spectrometry, and the results of environmental natural radioactivity of Iznik Lake and its surroundings were determined. In the measurement results, Ra-226 was found to be below the world average value at all locations. It is assumed that the determination of K-40 values above the average values was due to agricultural activities carried out intensively in the study area. Th-232 values were found to be below the world average value in drilling samples; Cs-137 values were below the background level in all samples. According to these results, the study area does not contain any unnatural radioactivity.
Źródło:: Nukleonika; 2019, 64, 3; 103-109
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: On release of radionuclides from a near-surface radioactive waste repository to the environment
Autorzy:: Gudelis, A.
Gorina, I.
Powiązania:: https://bibliotekanauki.pl/articles/146504.pdf
Data publikacji:: 2015
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: near-surface repository
radionuclides
groundwater
radionuclide release
forest environment
Opis:: A closed near-surface radioactive waste repository is the source of various radionuclides causing the human exposure. Recent investigations confi rm an effectiveness of the engineering barriers installed in 2006 to prevent the penetration of radionuclides to the environment. The tritium activity concentration in groundwater decreased from tens of kBq/l to below hundreds of Bq/l. The monitoring and groundwater level data suggest the leaching of tritium from previously contaminated layers of unsaturated zone by rising groundwater while 210Pb may disperse as a decay product of 226Ra daughters.
Źródło:: Nukleonika; 2015, 60, No. 3, part 2; 551-555
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Usefulness of thoracic electrical bioimpedance in detection of ejection fraction changes
Autorzy:: Hartleb, M.
Rudzki, K.
Waluga, M.
Janusz, M.
Karpel, E.
Powiązania:: https://bibliotekanauki.pl/articles/71031.pdf
Data publikacji:: 2000
Wydawca:: Polskie Towarzystwo Fizjologiczne
Tematy:: thoracic electrical bioimpedance
orthostasis
handgrip
postural change
radionuclide ventriculography
Źródło:: Journal of Physiology and Pharmacology; 2000, 51, 1
0867-5910
Pojawia się w:: Journal of Physiology and Pharmacology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Experimental Study of the Negative Impact on the Environment During the Extraction of Uranium By In-Situ Leaching
Autorzy:: Kryakhtunov, Alexander V.
Powiązania:: https://bibliotekanauki.pl/articles/2086430.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: geoecological characteristics
deposit area
uranium
radionuclide content
underground leaching
Opis:: The purpose of this study was a detailed analysis of all aspects related to the impact of objects and structures of the planned economic activity on the environment on the territory of the Semizbay deposit in the Republic of Kazakhstan. In the course of the work, the geoecological characteristics of the Semizbay deposit were presented. The analysis of data on the state of the components of the natural environment, based on the materials of earlier studies at the facility, was carried out. On the basis of the actual material, a list of priority pollutants subject to monitoring was compiled. The methodology and organization of the projected works are given. The types, conditions, scope of work were indicated. During the study, the following were carried out: soil sampling was carried out in the vicinity of the deposit, radiochemical analysis, and X-ray diffraction analysis. As a result of the study, a program of geoecological research was developed on the territory of the deposit: the content of radionuclides and the mineralogical composition of the sample were determined, which can become an alternative for further research on the territory of the enterprise.
Źródło:: Journal of Ecological Engineering; 2022, 23, 5; 260--270
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Determination of the sediment deposition rates in the Kuwait Bay using 137Cs and 210Pb
Autorzy:: Al-Zamel, A.
Bou-Rabee, F.
Al-Sarawi, M.
Olszewski, M.
Bem, H.
Powiązania:: https://bibliotekanauki.pl/articles/148519.pdf
Data publikacji:: 2006
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: bottom sediments
sedimentation rate
unsupported 210Pb
137Cs radionuclide
Opis:: Five bottom sediment cores from the Kuwait Bay were dated using 210Pb and 137Cs radionuclides. For evaluating the sedimentation rate two methods were applied: geochronology with the constant rate of supply unsupported 210Pb (CRS model) and the Weibull distribution of anthropogenic 137Cs. The sedimentation rates in this region, calculated by the first method ranged from 0.24 to 0.39 cm/year, while the same rates obtained from 137Cs distribution were slightly lower: from 0.1 to 0.25 cm/year. These relatively small differences can be explained by additional input of the Chernobyl accident to the 137Cs inventory in the bottoms sediments of the Northern Hemisphere.
Źródło:: Nukleonika; 2006, 51,suppl.2; 39-44
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Evaluation of internal exposure of nuclear medicine staff working with radioiodine in Poland
Autorzy:: Krajewska, Grażyna
Krajewski, Paweł
Powiązania:: https://bibliotekanauki.pl/articles/21375376.pdf
Data publikacji:: 2023-11-27
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:: nursing
medical imaging
radionuclide imaging
radiation effects
radioisotope therapy
radioisotope scanning
Opis:: The iodine-131 (I-131) content in the thyroid of staff members working with this radionuclides has been measured with about 500 employees in about 25 hospital’s departments of nuclear medicine performing therapy and diagnosis of thyroid disease in Poland. The measurements were performed with portable detection unit for in situ measurements of radioiodine. This is consist with scintillation detector sodium iodine activated by thallium (NaI(Tl)) – battery-powered and portable tube base Multichannel Analyzer Canberra UniSPEC. Based on direct measurements of the iodine content, the effective dose equivalent for workers due to inhalation of I-131 was estimated. All individuals actively working with iodine show measurable amounts of this isotopes in their thyroids. The average measured activity in the thyroid of the nuclear medicine staff was found to be equal at average 550 Bq within the range 70 Bq–2.5 kBq. There is no apparent correlation between the measured I-131 levels and risk categories. Nevertheless the technical and nuclear medicine staff show higher I-131 thyroid level comparing to hospital services staff. Calculated maximum committed effective dose for particular exposed person is <10% of 20 mSv/year.
Źródło:: International Journal of Occupational Medicine and Environmental Health; 2023, 36, 5; 587-595
1232-1087
1896-494X
Pojawia się w:: International Journal of Occupational Medicine and Environmental Health
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Assessment of radionuclide migration and radiological human exposure at the closed near-surface radioactive waste repository
Autorzy:: Gudelis, A.
Nedveckaite, T.
Prokopčiuk, N.
Filistovič, V.
Remeikis, V.
Motiejunas, S.
Powiązania:: https://bibliotekanauki.pl/articles/148646.pdf
Data publikacji:: 2010
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: near-surface repository
engineering barriers
radionuclide migration
groundwater pathway
radiation protection
Opis:: The near-surface “RADON” type radioactive waste repository, installed in 1963 and designed to store radioactive waste formed in industry, medicine and scientific investigations, was closed in 1989 because it did not meet the requirements imposed on the radioactive waste disposal. A comparatively small amount of radioactive waste is stored in this repository, but the inventory comprises various kinds of waste: short-lived low-level radioactive waste, short-lived low and intermediate radioactive waste, long-lived intermediate and high-level radioactive waste. The possible site-specific radionuclide migration through the groundwater pathway as well as the human exposure are considered by the computer program RESRAD-OFFSITE in this paper. The analysis of the obtained data shows that out of all stored radionuclides only H-3, C-14 and Cl-36 exceeding the dose constraint of 0.2 mSv can be considered as dangerous. The monitoring carried out in the repository environment has shown the contamination of groundwater with radioactive tritium and a significant reduction of contamination after construction of additional protective engineering barriers. For the assessment of the contribution of separate site-specific parameters of the model taking into account uncertainties of the model and parameters to the annual effective dose, the computer code RESRAD-OFFSITE provides the possibility of applying the regression analysis. It has been determined that the aquifer lateral dispersion as well as the hydraulic gradient, the radionuclide activity concentration in the repository together with the rate of penetration into the environment and the precipitation amount have the largest influence on the assessment accuracy of annual effective doses.
Źródło:: Nukleonika; 2010, 55, 2; 251-259
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Technical preparations for atmospheric radioactivity monitoring
Autorzy:: Miyamoto, Y.
Oda, T.
Adachi, T.
Noguchi, H.
Nishimura, H.
Usuda, S.
Powiązania:: https://bibliotekanauki.pl/articles/147567.pdf
Data publikacji:: 2001
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: airborne dust
background activity
CTBT
environmental radioactivity
nuclear explosion
radionuclide monitoring
Opis:: To evaluate the suitability of a location for a radionuclide monitoring station of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) at Takasaki, Japan, the assessment was done in terms of the concentration of natural background radioactive nuclides in airborne dust and soil samples. The samples were taken four times at the proposed site and several points around the site, then their radioactivities were measured by gamma-ray spectrometry. For the airborne dust samples, only natural background radionuclides: 212Pb, 7Be and 214Pb were detected. The radioactivity concentrations of these radionuclides varied in four sampling periods but were almost the same as the previous measurements. For the soil samples, the concentration of an anthropogenic radionuclide, 137Cs, fluctuated among the different sampling points and periods, but the concentration of 40K was constant. These concentrations were 2 to 3 times lower than those of the soil taken at JAERI Tokai. Based on these results, the proposed site was evaluated and has been accepted by the CTBT Organization as a CTBT radionuclide monitoring station.
Źródło:: Nukleonika; 2001, 46, 4; 123-126
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Migration of strontium, cesium, europium and uranium from poly(methyl styrene)- and polystyrene - phosphate composites prepared using gamma radiation
Autorzy:: Alhassanieh, O.
Ajji, Z.
Powiązania:: https://bibliotekanauki.pl/articles/146616.pdf
Data publikacji:: 2012
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: poly(methyl styrene)
polystyrene
composites
distribution
radionuclide
europium
strontium
cesium
uranium
Opis:: Composites consisting of natural phosphate powder and two monomers (styrene or methyl styrene) have been prepared by means of gamma irradiation. The polymerization reaction was followed up using a thermogravimetric analyzer (TGA) to determine the conversion of the polymerization. Differential scanning calorimeter (DSC) was used to locate and determine the glass transition temperature (Tg) of the prepared samples. The distribution of 137Cs, 152Eu, 85Sr and 238U in a solid-aqueous system, composites of phosphate-poly(methyl styrene) and of phosphate-polystyrene in contact with groundwater, was investigated using alfa-spectrometry and fluorometry. The effects of contact time, pH, and the concentration of concurrent element (Ca) were studied. The results were compared with earlier results with phosphate alone in the solid phase. The ability of the produced composites to keep the studied radioisotopes in the solid phase is much higher than in the mineral phosphate. This improvement is more remarkable for strontium and cesium than for europium and uranium, due to their high element ratio in the solid phase in phosphate experiments.
Źródło:: Nukleonika; 2012, 57, 3; 369-374
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Water Quality and Radionuclides Content Assessment of the Al-Najaf Sea: Case Study
Autorzy:: Zwain, Haider M.
Almurshedi, Kareem Radhi
Vakili, Mohammadtaghi
Dahlan, Irvan
Naje, Ahmed Samir
Powiązania:: https://bibliotekanauki.pl/articles/1839100.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: irrigation water
water quality assessment
salinity
sodicity
radionuclide
Al-Najaf Sea
Opis:: The Al-Najaf state is witnessing an increased economic development and attracting more investments that require the development of new areas and exploring new water resources. This study evaluates the quality of 12 surface water samples and groundwater from 12 wells for irrigation according to the salinity and sodicity hazards based on electrical conductivity (EC) and sodium adsorption ratio (SAR). In addition, the concentrations of radionuclides, which include Thorium (232Th), Uranium (238U), Potassium (40K) and Cesium (137Cs) were tested in four soil samples in the study area. It was found that the average values of pH, total hardness, Na, Ca, Mg, K, Cl, SO4, NO3 for groundwater and surface water were 8 and 6, 2287 and 4006 mg/L, 1140 and 1232 mg/L, 378 and 637 mg/L, 327 and 587 mg/L, 2 and 2 mg/L, 989 and 2007 mg/L, 1149 and 1325 mg/L, as well as 2 and 2 mg/L, respectively. From salinity and sodicity hazards analysis, the groundwater had EC of 5242 µS/cm and SAR of 61, whereas surface water had EC of 6253 µS/cm and SAR of 50. Furthermore, the concentrations of radionuclides, i.e. 232Th, 238U, 40K and 137Cs in the soil samples were found to be 11.02, 34.12, 544.45, and 1.6 Bq/kg, respectively. The concentrations of radionuclides were within the worldwide baseline, expect for 40K. The study concluded that both water sources are classified as very high salinity and sodium water (class C4-S4), and it cannot be used for irrigation, only suitable for the salt tolerant crops.
Źródło:: Journal of Ecological Engineering; 2021, 22, 2; 262-271
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 16.

Tytuł:: Analysis of radionuclide release through EBS of conceptual repository for Lithuanian RBMK spent nuclear fuel disposal : case of canister with initial defect
Autorzy:: Poskas, P.
Narkuniene, A.
Grigaliuniene, D.
Kilda, R.
Powiązania:: https://bibliotekanauki.pl/articles/147504.pdf
Data publikacji:: 2013
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: geological repository
near field
radionuclide release
radiotoxicity
RBMK reactor
spent nuclear fuel
Opis:: This paper presents research on radionuclide transport from generic geological repository for the RBMK-1500 SNF of 2.8 235U initial enrichment (with Er absorber) and average burn-up of ~ 29 MWd/kgU. Radionuclide transport analysis was focused on the engineered barrier system (EBS) and performed taking into account possible differences in the data on the initial size of a canister defect, defect enlargement time and radionuclide release start time. For the numerical simulations, computer code AMBER (UK) was used. The analysis of radionuclide transport regularities demonstrates that the release from the EBS is the most intensive after the defect enlargement. Most relevant radionuclides were identified based on the mass transfer analysis complemented by the analysis of radiotoxicity flux. The results showed that, depending on the differences of the initial defect size, defect enlargement time and release start time, the peak flux from the EBS may vary by a factor of 2 (for 129I) and 1.5 (for 226Ra) for RBMK-1500 SNF.
Źródło:: Nukleonika; 2013, 58, 4; 487-495
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 17.

Tytuł:: Realisation of radionuclides activity unit using the liquid scintillation counting (LSC)
Odtwarzanie jednostki aktywności radionuklidów za pomocą techniki ciekłych scyntylatorów (LSC)
Autorzy:: Broda, R.
Dziel, T.
Ziemek, T.
Listkowska, A.
Powiązania:: https://bibliotekanauki.pl/articles/408183.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:: radionuclide activity
liquid scintillators
LSC technique
aktywność radionuklidu
ciekłe scyntylatory
technika LSC
Opis:: Registration of the effects of interaction of the radiation emitted after radioactive decay enables determination of activity of a given material expressed in becquerels (Bq). Measurements in a frame of international comparisons of ¹⁴ C activity using the triple-to-double coincidence ratio (TDCR) method and of ¹⁷⁷ Lu activity using the 4π(LS)-γ coincidence and anticoincidence method, where the liquid scintillation technique (LSC) was used, were described. Specificity of short-lived radionuclides activity determination was discussed.
Rejestracja oddziaływania z materią promieniowania emitowanego w czasie rozpadów promieniotwórczych umożliwia określenie aktywności danego materiału w bekerelach (Bq). Omówiono wykonane w trakcie międzynarodowych porównań pomiary aktywności ¹⁴ C metodą potrójno-podwójnych koincydencji (TDCR) oraz ¹⁷⁷ Lu metodą 4π(LS)-γ koincydencji i antykoincydencji, w których zastosowana jest technika ciekłych scyntylatorów (LSC). Omówiono specyfikę pomiaru aktywności radionuklidów krótkożyciowych.
Źródło:: Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2016, 3; 28-31
2083-0157
2391-6761
Pojawia się w:: Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Elucidation of reaction mechanisms using kinetic isotope effects of short-lived radionuclides
Autorzy:: Matsson, O.
Powiązania:: https://bibliotekanauki.pl/articles/146955.pdf
Data publikacji:: 2002
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: carbon-11
fluorine-18
kinetic isotope effect
reaction mechanism
short-lived radionuclide
Opis:: The use of the short-lived radionuclides 11C and 18F for the elucidation of organic reaction mechanisms is described. Examples of the different mechanistic problems that are discussed include concerted vs. stepwise base catalysed elimination (E2 or E1cB) and finding the rate limiting step for nucleophilic aromatic substitution (SNAr). The use of radionuclides to learn details about transition state structure for concerted nucleophilic aliphatic substitution (SN2) is also described.
Źródło:: Nukleonika; 2002, 47,suppl.1; 43-45
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 19.

Tytuł:: Natural radioactivity in steel slag aggregate
Naturalna radioaktywność w kruszywie z żużla stalowniczego
Autorzy:: Sofilić, T.
Barišić, D.
Sofilić, U.
Powiązania:: https://bibliotekanauki.pl/articles/351477.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: radioaktywność
radionuklidy
żużel
przemysłowy produkt uboczny
radioactivity
radionuclide
slag
aggregates
industrial by-product
Opis:: Present day steelmaking slags are being successfully used as a high quality mineral aggregate for the building industry. With this, it is of vital importance to be familiar with the technical significance of the secondary application of steel slag, because some steel slag might contain increased concentration of substances harmful to human health. In terms of steel slag impact on the environment, radionuclides are the least researched of all pollutants emitted from the metallurgical processes. This paper presents the results of radiochemical testing of steel slag and steel slag aggregates for the purpose of its use in the production of construction material. Obtained results of measurements show that 40K, 226Ra and 232Th in all examined steel slag samples have the activity concentration from 45.3 to 62.9Bqkg-1, 15.2 to 21.4Bqkg-1 and 12.9 to 15.4Bqkg-1, respectively. Results of measurements of radionuclide activity concentrations of 226Ra, 232Th and 40K in slag aggregates show similar values for all radionuclides ranges as follows: 40K from 14.1 to 23.3Bqkg-1; 232Th from 8.6 to 14.4Bqkg-1 and 226Ra from 14.8 to 26.8Bqkg-1. Activities index (I1, I2, I3) of 226Ra, 232Th and 40K were compared with values recommended by Croatian legislation. Radium equivalent concentrations (Raeq) of 226Ra, 232Th and 40K for examined steel slag and steel slag aggregates are harmounious with the results presented by other authors for the same by-product. The testing has been conducted on steel slag created during the production of carbon steel by electric arc furnace in Steel Mill of CMC Sisak, Croatia.
Obecnie żużle stalownicze są z powodzeniem używane do wytwarzania wysokiej jakości kruszywa mineralnego dla budownictwa. Z tego powodu, istotnego znaczenia nabiera znajomość wtórnego zastosowania żużli, ponieważ niektóre żużle mogą zawierać zwiększone stężenie substancji szkodliwych dla zdrowia ludzkiego. Pod względem wpływu żużli na środowisko, radionuklidy są najmniej zbadane ze wszystkich zanieczyszczeń emitowanych z procesów metalurgicznych. W pracy przedstawiono wyniki badań radiologicznych żużla stalowniczego i kruszyw przeznaczonych do produkcji materiałów budowlanych. Otrzymane wyniki badań próbek żużla wskazują, że aktywność promieniotwórcza: 40K, 226Ra, 232Th wynosi odpowiednio: 45.3 do 62.9Bqkg-1; 15.2 do 21.4Bqkg-1; i 12.9 do 15.4Bqkg-1. W przypadku kruszywa otrzymano podobne wyniki dla wszystkich radionuklidów tj.: 40K od 14.1 do 23.3Bqkg-1; 232Th od 8.6 do 14.4Bqkg-1; i 226Ra od 14.8 do 26.8Bqkg-1. Indeks aktywności (I1, I2, I3) dla 226Ra, 232Th i 40K został porównany z wartościami rekomendowanymi przez chorwackie prawo. Równoważne stężenia radu (Raeq) dla 226Ra, 232Th i 40K dla badanych kruszyw są zgodne z wynikami przedstawionymi przez innych autorów dla tego samego materiału. Badania przeprowadzone zostały na żużlu stalowniczym otrzymanym w trakcie produkcji stali w łukowym piecu elektrycznym w hucie stali CMC Sisak w Chorwacji.
Źródło:: Archives of Metallurgy and Materials; 2011, 56, 3; 627-634
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 20.

Tytuł:: Radionuclides in ground-level air and deposits near the Ignalina NPP
Autorzy:: Jasiulionis, R.
Savickaite, I.
Powiązania:: https://bibliotekanauki.pl/articles/148108.pdf
Data publikacji:: 2001
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: atmosphere
environment of Ignalina NPP
numerical models
radionuclide
water-insoluble fractions
water-soluble fractions
Opis:: Abstract Results of systematic measurements of radionuclide activity concentrations in the air and deposits from January 1997 to July 2000 near the Ignalina Nuclear Power Plant (hereafter detoted as NPP) are presented. The data on NPP produced radionuclides 60Co and 54Mn in deposits and results of calculation are used for establishment of their distribution near NPP. Water-soluble and water-insoluble radionuclide fractions in the airborne effluents of NPP were investigated. The possibility to evaluate the deposition factor of water-soluble and water-insoluble radionuclides from the NPP jet by comparing the experimental data in the NPP stack and the environment is shown.
Źródło:: Nukleonika; 2001, 46, 4; 183-187
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 21.

Tytuł:: Radiobiokoniugaty znakowane emiterami elektronów Augera w celowanej terapii radionuklidowej
Radiobioconiugates labeled with Auger electron emitters in targeted radionuclide therapy
Autorzy:: Wawrowicz, Kamil
Bilewicz, Aleksander
Powiązania:: https://bibliotekanauki.pl/articles/1409837.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: radiofarmacja
celowana terapia radionuklidowa
emitery elektronów Augera
radiopharmacy
targeted radionuclide therapy
Auger electron emitters
Opis:: In contrast to the radiation therapy methods, that use an external ion beam source, the internal radiotherapy is performed by the direct administration of radionuclides conjugated to a targeting vector. Crucial criteria for the use of radiopharmaceuticals at a selective localization and retention in the tumor lesion are biological or biochemical differences between tumor and non-tumor tissue. Auger electron emitters that can target cancer cells are an attractive agents for internal radiation therapy. Besides of a emitters, radionuclides that decay with the emission of very low energy Auger electrons are well suited for the treatment of small tumors, micrometastases or residual tumor after surgical resection of a primary lesion. In contrast to a radiation, however, Auger emitters have low toxicity when decaying outside the cell during blood transport and they are therefore interesting candidates for targeted radionuclide therapy. However, due to nanometers range of Auger electrons the challenge is to target cancer cells specifically and achieve intracellular and intranuclear uptake for maximum DNA damage. So far, no system has been developed to allow for selective delivery of the Auger electron emitter to the cancer cell and next delivering it to cell nucleus, near the DNA strand. An overview of Auger radiation therapy approaches of the past decade shows several research directions and various targeting vehicles. The latter include small molecules, aptamers, hormones, halogenated nucleotides, peptides oligonucleotides and monoclonal antibodies and their fragments. In present article we discuss the basic principles of Auger electron therapy as compared with targeted α and β radionuclide therapy, characteristic of used Auger emitters and briefly the main advantages and disadvantages of the different targeting modalities that are under investigation.
Źródło:: Wiadomości Chemiczne; 2020, 74, 11-12; 699-733
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 22.

Tytuł:: Budget of 90Sr in the Gulf of Gdansk (Southern Baltic Sea)
Autorzy:: Saniewski, M.
Zalewska, T.
Powiązania:: https://bibliotekanauki.pl/articles/47421.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Gdansk Gulf
Baltic Sea
radioactivity
90 strontium
sediment deposition
sea water
atmospheric deposition
radionuclide
budget
Źródło:: Oceanologia; 2018, 60, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:: Założenia metodyczne w zakresie modelowanie migracji radionuklidów w środowisku geologicznym w sąsiedztwie składowisk nisko- i średnioaktywnych odpadów promieniotwórczych
Methodological recommendations in radionuclide migration modelling in geosphere in vicinity of low and intermediate radioactive waste repositories
Autorzy:: Lankof, L.
Pająk, L.
Powiązania:: https://bibliotekanauki.pl/articles/203428.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:: migracja radionuklidów
model hydrogeologiczny
modelowanie koncepcyjne
modelowanie numeryczne
radionuclide migration
hydrogeological model
conceptual modelling
numerical modelling
Opis:: Modelowanie migracji radionuklidów w środowisku geologicznym w sąsiedztwie powierzchniowych składowisk promieniotwórczych odpadów nisko- i średnioaktywnych jest jednym z istotniejszych elementów wpływającym na ocenę długotrwałego bezpieczeństwa tych składowisk. Poza opisem zagadnień związanych z numerycznym modelowaniem migracji radionuklidów w środowisku geologicznym artykuł przedstawia również w skrócie metodykę oceny bezpieczeństwa polegającą na: określeniu scenariuszy uwalniania radionuklidów do środowiska, sformułowaniu modeli koncepcyjnych migracji radionuklidów w środowisku geologicznym, stworzeniu modelu geologicznego i hydrogeologicznego oraz implementacji tych modeli do obliczeń numerycznych i oceny narażenia człowieka na promieniowanie.
Radionuclide migration modelling in geosphere in vicinity of near surface low and intermediate radioactive waste is one of the most important components of long term safety assessment of this type facility. In addition to the issues related to the numerical modelling of radionuclides migration in geosphere also methodology for safety assessment scenarios involving the determination of radionuclides release into geosphere as well as formulating conceptual models of radionuclides migration and geological and hydrogeological models and implementation of these models for numerical calculations allowing assessment of human exposure to radiation were briefly presented in this article.
Źródło:: Technika Poszukiwań Geologicznych; 2014, R. 53, nr 1, 1; 85-97
0304-520X
Pojawia się w:: Technika Poszukiwań Geologicznych
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 24.

Tytuł:: Radioactivity of the food at Novi Sad markets
Radionuklidy w żywności z targowisk Nowego Sadu
Autorzy:: Varga, E.
Bikit, I.
Slivka, J.
Zikić-Todorowić, N.
Veskovic, M.
Conkić, L.
Mrda, D.
Powiązania:: https://bibliotekanauki.pl/articles/340290.pdf
Data publikacji:: 2004
Wydawca:: Główny Instytut Górnictwa
Tematy:: żywność
radionuklidy
spektrometria gamma
dawka na wskutek wniknięcia drogą pokarmową
food
radioactivity
radionuclide
gamma spectrometry
ingestion dose
Źródło:: Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa; 2004, 1; 35-36
1643-7608
Pojawia się w:: Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:: Assessment of Radiological Dose around a 3-MW TRIGA Mark-II Research Reactor
Autorzy:: Rahman, A. F. M. M.
Shamsuzzaman, M.
Rahman, M. S.
Uddin, K.
Yeasmin, S.
Nazmul, Haque H. M.
Akramuzzaman, M. M.
Chakraborty, S. R
Powiązania:: https://bibliotekanauki.pl/articles/412377.pdf
Data publikacji:: 2013
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: source term
release rate
TRIGA Mark-II reactor
dispersion
ingestion and deposition of radionuclide
Gaussian plume model
dose calculations
Opis:: A hypothetical accidental case of a 3-MW TRIGA Mark-II research reactor has been assumed to assess the radiological consequences due to the deposition of 137Cs and 90Sr on ground, vegetation, milk and meat. The air concentrations in sixteen cardinal directions have been estimated where the maximum concentration has been found to be at 110 m distance from the core of the reactor for all the directions. Calculated maximum doses of 137Cs, 90Sr and both 137Cs and 90Sr have been found to be within the ranges of 0.005-0.014 μSv hr–1, 0.013-0.036 μSv hr–1 and 0.018-0.05 μSv hr–1, respectively for all the directions, which are below the measured background dose limit 0.25 μSv hr–1 and also within the IAEA acceptable dose rate limit of 0.5 μSv hr–1. The calculated low doses due to the aforementioned radionuclides can be considered negligible with regard to the radiation hazards. The relationship between total effective dose rate for various pathways (i.e. immersion, inhalation, ground deposition, and ingestion of contaminated vegetation, milk, meat) and air concentration in all the directions has been established. Obtained relation reveals that the total effective dose rate is directly proportional to the air concentration, and the overall proportionality constants for 137Cs and 90Sr radionuclides have been obtained as 0.57 and 0.28, respectively. This study might provide information on the radiological safety required for the radiation protection purposes of the people living in the vicinity of the reactor site.
Źródło:: International Letters of Chemistry, Physics and Astronomy; 2013, 10, 2; 183-200
2299-3843
Pojawia się w:: International Letters of Chemistry, Physics and Astronomy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 26.

Tytuł:: Studium literaturowe nad zdolnością sorpcyjną technetu-99 oraz strontu-90 w warunkach zróżnicowania fizykochemicznego osadów geologicznych
The literature study on the sorption potential of technetium-99 and strontium-90 in a physico-chemical diversity of geological deposits
Autorzy:: Miecznik, M.
Powiązania:: https://bibliotekanauki.pl/articles/203794.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:: stront
technet
radionuklidy
Krajowe Składowisko Odpadów Promieniotwórczych w Różanie
strontium
technetium
sorption
radionuclide
National Radioactive Waste Repository at Różan
Opis:: Migracja pierwiastków promieniotwórczych z warstw powierzchniowych gleby poprzez kolejne warstwy osadów geologicznych ma ogromne znaczenie ze względu na przedostawanie się potencjalnego zagrożenia radiologicznego do warstw wodonośnych, a przez to do ujęć wody pitnej i użytkowej. Obecność antropogenicznych radionuklidów w środowisku jest związana zarówno z występującymi w przeszłości awariami obiektów jądrowych, takich jak katastrofa w Czarnobylu, próbnych testów jądrowych jak i coraz częstszego wykorzystywania tych pierwiastków w przemyśle i medycynie nuklearnej. Poniższa praca ma na celu nakreślenie poprzez studium literaturowe własciwości fizykochemicznych pierwiastków strontu i technetu, w celu określenia ich potencjału sorpcyjnego do osadów geologicznych z okolic Krajowego Składowiska Odpadów Promieniotwórczych w Różanie (ok. 90 km na NE od Warszawy). Omówione zostały tutaj czynniki zewnętrzne mające wpływ na sorpcyjność danego pierwiastka, takie jak pH, rodzaj osadu geologicznego, obecność mikroflory bakteryjnej jak i innych pierwiastków w warstwie wodonośnej. Sam mechanizm sorpcji także może być różny dla różnych pierwiastków. Wyniki tej analizy posłużą w przyszłości do przygotowania eksperymentu polegającego na doświadczalnej ocenie potencjału sorpcyjnego osadów geologicznych pobranych w rejonie KSOP w Różanie, jak i czułość strontu i technetu pod względem sorpcyjności na pozostałe czynniki mogące wystąpić w badanym środowisku.
Migration of radionuclides from the surface through the underground geological layers has a great meaning because of their radiological hazard during a contact with underground water and possible infiltration into useable and drinking water. Anthropogenic radionuclides presence in the environment is the effect of both past breakdowns of nuclear objects like the Czarnobyl reactor damage, nuclear weapon tests and more common usage of radionuclides in the industry and nuclear medicine. The goal of this paper is to highlight physicochemical characteristic of strontium and technetium based on the literature study to find out their sorption potential to the geological sediments present in National RadioactiveWaste Repository area at Różan (about 90 km to the NE from Warsaw). This paper discusses different parameters having influence on the strontium or technetium sorption potential like pH, type of geological sediment, bacterium occurrence or other elements presence in the groundwater. The sorption mechanism may also differ among different elements. Conclusions from this analysis will be the base to the planning of experiment which assumes the measurement of the discussed sorption potential of geological sediments sampled in the National Radioactive Waste Repository area at Różan for strontium and technetium.
Źródło:: Technika Poszukiwań Geologicznych; 2012, R. 51, nr 1, 1; 73-85
0304-520X
Pojawia się w:: Technika Poszukiwań Geologicznych
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Fly ash in agriculture - modern applications of coal combustion by-products
Popioly lotne a rolnictwo - nowoczesne zastosowania ubocznych produktow spalania
Autorzy:: Szponder, D.K.
Trybalski, K.
Powiązania:: https://bibliotekanauki.pl/articles/793647.pdf
Data publikacji:: 2011
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: fly ash
coal combustion
agriculture
soil quality
fertilization
soil contamination
physical property
chemical property
biological property
heavy metal
radionuclide contamination
Źródło:: Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11
1641-7739
Pojawia się w:: Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 28.

Tytuł:: Bioaccumulation of gamma emitting radionuclides in red algae from the Baltic Sea under laboratory conditions
Autorzy:: Zalewska, T.
Saniewski, M.
Powiązania:: https://bibliotekanauki.pl/articles/48962.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Baltic Sea
bioaccumulation
environment pollution
Furcellaria lumbricalis
heavy metal
laboratory condition
macroalga
marine alga
marine organism
Polysiphonia fucoides
radionuclide
red alga
Opis:: The bioaccumulation ability of radionuclides 51Cr, 54Mn, 57Co, 60Co, 65Zn, 85Sr, 109Cd, 110mAg, 113Sn, 137Cs and 241Am in two red algae species from the southern Baltic Sea – Polysiphonia fucoides and Furcellaria lumbricalis – was determined under laboratory conditions. P. fucoides demonstrated better bioaccumulative properties towards most of the investigated radionuclides. As a result, P. fucoides can be recommended as a good bioindicator of radioactive environmental pollution. The bioaccumulation of radionuclides in F. lumbricalis was studied during an extended laboratory experiment. The initial extensive uptake of radioisotopes was followed by the rapid removal of cations; in general, concentrations tended to decrease with time. 137Cs displayed a different behaviour, its concentration in the algae increasing over time mainly due to its large ion radius; this is a factor that could be responsible for the stronger mechanical and chemical bonding of Cs+ and that could hamper the movement of ions in both directions.
Źródło:: Oceanologia; 2011, 53, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 29.

Tytuł:: Metal pollutants and radionuclides in the Baltic Sea - an overview
Autorzy:: Szefer, P.
Powiązania:: https://bibliotekanauki.pl/articles/48734.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: fish
trace element
metal pollutant
suspended matter
plankton
zoobenthos
sea water
Baltic Sea
biomonitor
chemical balance
marine mammal
radionuclide
pollution
metal
Baltic ecosystem
Opis:: This overview presents in detail the state of knowledge of the abilities of various components of the Baltic Sea environment to accumulate trace elements and radionuclides. Particular components of the Baltic ecosystem (abiotic and biotic) are considered as potential monitors of pollutants. The use of seaweeds, e.g. Fucus vesiculosus or Zostera marina is recommended, also molluscs, e.g. Mytilus edulis, for biomonitoring surveys of metal pollutants and radionuclides in the Baltic Sea. However, several requirements need to be met if results are to be reliable. Since metal levels and radionuclide activities in the growing tips of F. vesiculosus reflect exclusively the levels of their dissolved species in the ambient seawater, this alga is very useful for monitoring dissolved species of metal pollutants and radioisotopes in the Baltic ecosystem. In contrast, M. edulis, a filter feeder is an appropriate tool for monitoring trace elements occurring in both chemical forms, i.e. dissolved and suspended species. Therefore, full information on the bioavailability and toxicity of heavy metals (depending on their chemical speciation) as pollutants of the Baltic Sea can be obtained if at least two biomonitoring organisms are applied simultaneously, e.g. F. vesiculosus and M. edulis. Moreover, the data matrix can be interpreted more accurately if not only trace element but also macroelement concentrations (Ca, Mg, Na, K) in these two representatives of Baltic phytoand zoobenthos are taken into consideration; this point requires special attention. Two coastal species of fish, i.e. Zoarces viviparus and Perca fluviatilis, are good biomonitors of metallic contaminants, so their use as sentinels is recommended. The budgets of chemical elements and the ecological status of the Baltic Sea are presented. Several ‘blacksp ots’, e.g. large estuaries and seaport towns, heavily polluted by trace elements, are identified in the Baltic Sea and other enclosed seas such the Mediterranean and the BlackS eas. Of these seas, the Baltic is the most heavily loaded with trace elements and organic pollutants. The overview identifies gaps in our environmental knowledge of the Baltic Sea, and sets out possible priorities, key areas or strategies for future research.
Źródło:: Oceanologia; 2002, 44, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 30.

Tytuł:: Polonium, uranium and plutonium radionuclides in aquatic environment of Poland and Southern Baltic
Radionuklidy polonu, uranu i plutonu w środowisku wodnym Polski i południowego Bałtyku
Autorzy:: Skwarzec, B.
Powiązania:: https://bibliotekanauki.pl/articles/84962.pdf
Data publikacji:: 2009
Wydawca:: Akademia Pomorska w Słupsku
Tematy:: polonium
uranium
plutonium
radionuclide
determination
marine trophic chain
aquatic environment
Polska
Baltic Sea
river
Odra River
Vistula River
Pomeranian region
trophic chain
river catchment
Opis:: In the paper were presented the results of study for determination of natural (polonium 210Po, uranium 234U and 238U) and artificial (plutonium 238Pu, 239+240Pu and 241Pu) alpha radionuclides in aquatic environment of Poland and southern Baltic Sea as well as the recognition of their accumulation in marine trophic chain. The obtained results indicated that Vistula and Odra as well as Rega, Parsęta and Słupia are important sources of analyzed radionuclides in southern Baltic Sea. Total annual runoff of polonium, uranium and plutonium from Vistula, Odra and Pomeranian rivers to the Baltic Sea was calculated as about 95 GBq of 210Po, 750 GBq of 234+238U and 160 MBq of 238+239+240Pu. Investigation on the polonium 210Po, uranium 234U and 238U, as well as and plutonium 238Pu, 239+240Pu and 241Pu. concentration in Baltic biota revealed that these radionuclides, especially polonium and plutonium, are strongly accumulated by some species. The results indicate that the Baltic organisms accumulate polonium and plutonium from environment and the bioconcentration factors (BCF) range from 25 to 27 000. 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 via intersticial water to bottom water. The values of 234U/238U activity ratio in the sediments indicated that the possible reduction process of U(VI) to U(IV) and the removing of autogenic uranium from seawater to sediments in the Gdańsk Deep and Bornholm Deep constitutes a small part only.
W pracy przestawiono wyniki badań nad występowaniem naturalnych (polon 210Po, uran 234U i 238U) i sztucznych (pluton 238Pu, 239+240Pu i 241Pu) radionuklidów alfa promieniotwórczych w środowisku wodnym Polski i południowego Bałtyku, jak również rozpoznanie procesu ich nagromadzania w morskim łańcuchu troficznym. Wyniki badań wykazały, że Wisła i Odra oraz Rega, Słupia i Parsęta są ważnymi źródłami analizowanych radionuklidów w południowym Bałtyku. Całkowity roczny spływ polonu, uranu i plutonu wodami Wisły, Odry i rzek Przymorza został obliczony na 95 GBq dla 210Po, 750GBq dla 234+238U oraz 166 MBq dla 238+239+240Pu. Badania zawartości polonu 210Po, uranu 234U i 238U, jak również plutonu 238Pu, 239+240Pu oraz 241Pu w organizmach bałtyckich wykazały silne nagromadzanie w nich radionuklidów, szczególnie polonu i plutonu. Wartości współczynnika nagromadzania (BCF) polonu i plutonu w organizmach południowego Bałtyku mieszczą się w szerokim przedziale wartości od 25 do 27000. Bałtyckie wodorosty i organizmy zwierzęce nagromadzają uran w niewielkim stopniu. Z kolei w osadach bałtyckich stężenie uranu wzrasta z głębokością rdzeni, co związane jest z dyfuzją izotopów 234U, 235U i 238U za pomocą wody porowej do wody naddennej. Analiza wartości stosunku aktywności 234U/238U w osadach wykazała, że możliwa redukcja U(VI) do U(IV) i usuwanie autogenicznego uranu z wody morskiej do osadów w redukcyjnych rejonach Bałtyku: Głębi Gdańskiej i Głębi Bornholmskiej zachodzi w niewielkim stopniu.
Źródło:: Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2009, 13 part II
1643-0115
Pojawia się w:: Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:: Biblioteka Nauki

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Tytuł:: NORM-related industrial activities in Estonia - establishing national NORM inventory
Autorzy:: Vaasma, Taavi
Kiisk, Madis
Leier, Maria
Suursoo, Siiri
Jantsikene, Alar
Putk, Kaisa
Powiązania:: https://bibliotekanauki.pl/articles/92192.pdf
Data publikacji:: 2019
Wydawca:: Główny Instytut Górnictwa
Tematy:: naturally occuring radioactive materials
NORM-related industries
NORM inventory
ionizing radiation
industrial waste
radionuclide enrichment
naturalne źródła promieniowania
przemysł związany z NORM
Wykaz NORM
promieniowanie jonizujące
odpady przemysłowe
wzbogacanie radionuklidów
Opis:: There is incomplete information available concerning NORM-related (naturally occurring radioactive material) industries in Estonia. In order to fill the gap in this knowledge, a nationwide study was carried out between 2015 and 2017 to determine and radiologically characterize potential NORM-related industries. The study included compiling available literature and studies as well as on-site measurements (external dose rate and radon) and samplings in multiple industries, which had been determined to be potential NORM creators. The results from this study concluded that there are 3 industries in Estonia where the activity concentrations of naturally occurring radionuclides can reach an increased level which may require further regulatory control. Radionuclide exemption values were clearly exceeded in the filter materials of drinking water treatment plants that use water from Cambrian-Vendian aquifer. 226Ra and 228Ra values in filter materials reached over 40 kBq kg−1. Additionally, the gross radionuclide activity concentrations of 238U and 232Th in waste from a rare metal production industry reached up to 191 kBq kg−1. Clinker dust from the cement industry showed elevated concentrations of 210Pb, rising to over 2 kBq kg−1 in fine clinker dust. The creation of a national NORM inventory can be the basis for establishing a national NORM strategy for the management of NORM residues. This work provides a thorough overview of the radiological parameters of the potential NORM-related industries, describes the radionuclides that have elevated concentrations, provides estimations on their yearly creation amounts and produces input for determining possible NORM management options.
Źródło:: Journal of Sustainable Mining; 2019, 18, 2; 86-93
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Badanie zanieczyszczenia metalami ciężkimi i radionuklidami zwałowisk odpadów odlewniczych w Ozimku oraz ich wpływu na stan okolicznych gleb
The influence of waste products from steel foundry dump on heavy metals and radionuclides contaminations in local soils
Autorzy:: Bożym, M.
Staszak, D.
Majcherczyk, T.
Powiązania:: https://bibliotekanauki.pl/articles/392416.pdf
Data publikacji:: 2009
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Ceramiki i Materiałów Budowlanych
Tematy:: odpad przemysłowy
odlewnictwo żelaza
składowisko odpadów odlewniczych
wpływ na środowisko
metal ciężki
pierwiastek promieniotwórczy
zanieczyszczenie gleby
industrial waste
metallurgy
steel foundry dump
impact on environment
heavy metal
radionuclide
soil contamination
Opis:: Celem pracy było określenie wpływu pylenia z hałd zawierających odpady odlewnicze na zanieczyszczenie okolicznych gleb metalami ciężkimi i radionuklidami. Przedstawiono wyniki badań dwóch składowisk odpadów produkcyjnych byłej Huty "Małapanew" S.A. oraz gleb znajdujących się w różnej odległości od tych składowisk. Próbki odpadów i gleb zbierano w lipcu 2004 r., a następnie poddawano analizom fizykochemicznym. W próbkach oznaczono skład granulometryczny, pH, zawartooeć węgla organicznego i próchnicy, zawartośeć makroelementów (N, P, K, Ca, Mg), metali ciężkich (Zn, Cu, Cd, Pb, Ni i Cr) oraz aktywność radionuklidów w odpadach i glebach. Badane gleby należały do gleb lekkich o odczynie kwaśnym, średnio zasobnych w makroelementy. Odpady składały się głównie z piasków. Zawartość próchnicy i makroelementów (NPK) była relatywnie niższa niż w glebach. Zawartość Mg i Ca przewyższała ich stężenie w glebach. Badane gleby nie były skażone metalami ciężkimi i radionuklidami (z wyjątkiem Cd i 137Cs). Zawartość metali ciężkich, z wyjątkiem Ni i Cr oraz radionuklidów, z wyjątkiem 137Cs i 40K, była zbliżona w odpadzie i glebach. Nie wykazano wpływu odpadów z hałd na zanieczyszczenie metalami ciężkimi i radionuklidami okolicznych gleb.
The aim of this study was to determine the influence of dusting of waste products from steel foundry dump on metals and radionuclides contaminations in local soils. The work presents results of research of two waste products from steel foundry dump of "Małapanew" Co. steel foundry plant and soils situated in different distance from those storage yards. Waste and soils samples was collected in July 2004. In samples granulometric composition, pH, organic carbon and humus content, macronutrients (N, P, K, Ca, Mg), heavy metals (Zn, Cu, Cd, Pb, Ni i Cr) concentrations and radionuclides activity in wastes and soils were analysed. Light, acidic soils were inter-rich in macronutrients. Wastes mainly were consist of sand. Humus and macronutrients (NPK) content was relatively low than in soils, but Mg and Ca content was higher. Analysed soils were not contaminated with heavy metals and radionuclides (except respectively Cd i 137Cs). The heavy metals concentration, except Ni and Cr, and radionuclides activities, except 137Cs i 40K, was on the same level in wastes and soils. The influence of waste products in storage yards on metal and radionuclides contaminations in neighbouring soils was not researched.
Źródło:: Prace Instytutu Szkła, Ceramiki, Materiałów Ogniotrwałych i Budowlanych; 2009, R. 2, nr 4, 4; 107-121
1899-3230
Pojawia się w:: Prace Instytutu Szkła, Ceramiki, Materiałów Ogniotrwałych i Budowlanych
Dostawca treści:: Biblioteka Nauki