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Abstract  

Research data on concentration and transportation of 90Sr in cutivate soils and its migration in undisturbed from Łęczna-Włodawa Lake District are presented. 90Sr analysis was based on yttrium path. A special attention was paid to the precision in excluding of Th and U radioisotopes and their daughters using solid-liquid extraction (on Dovex ionite), and Pb by PbI2 precipitation. The obtained results revealed various contamination of studied soils by 90Sr although its concentration did not exceed 10 Bq/kg in the most samples. The highest concentration was noticed in upper 20 cm layers in both types of soils. Vertical migration rate of 90Sr, calculated from compartment model, was below 1 cm/yr for the most researched soils.

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Abstract  

The paper presents the results of studies of phosphate anion sorption on various types of soil taken up from the Lublin Province (Poland). Anions belong to the group of ions witch undergo insignificant sorption according to the soil science. As follows from the studies anion sorption depends insignificantly on pH. Sorption isotherms can be described using the Freundlich equation. Sorption extent depends on concentration of iron ions and organic substances in the sample. Specific sorption (chemisorptions) plays the greatest role in the process under investigation.

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Summary  

Results of studies of Na+, K+ and Cs+ influence on the adsorption of 85Sr on soil samples of the different types of successive horizons are presented. It was proved that the adsorption isotherms in log-log coordinates are of straight-line type and may be described by the Freundlich equation. Monovalent cations influence the coverage degree of the soil surface by 85Sr (most often lowering it) in the following order K+³Na+³Cs+. The investigation of pH influence proved its essential meaning in the process. The plateau of surface coverage degree versus pH lies above pH 5.5 or 6.5 depending on the soil type. Generally, in the studied system, the size of 85Sr adsorption depends on the concentration of the isotope, pH of the solution, type of monovalent cation, and on the soil properties.

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Abstract  

The adsorption of 90Y on various types of soil samples representing successive horizons was studied. The adsorption process can be described by a Freundlich isotherm and was influenced by the soil type and the horizons depth. Hydrogen ions did not have a significant influence on the adsorption of 90Y.

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Abstract  

Some results of the extraction of strontium and yttrium from soil samples by concentrated nitric acid are described. The concentration of Sr and Y in the solid was determined by XRF method. The results obtained allowed to elaborate the conditions of acid leaching and to propose an analytical procedure for the determination of 90Sr in samples without their total dissolution.

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Abstract  

Following up transfer of strontium from soil to plants requires determination of isotope in the surface layer of soil and a chosen plant. The most endangered food products are plants including commonly grown grain, which constitutes a basic feeding component for both people and animals. Indeed large amounts of 137Cs, 90Sr get into organisms of people and animals with the food, therefore determination of radioactivity of elements in food products and animal fodder is very essential. Choice of proper diet allows to limit the level of human organism denaturation. The aim of this paper was to study relocation of 90Sr, 137Cs, 40K isotopes from soil to grain and then from grain to food products. There were investigated soil, wheat, barley, groats, flour, macaroni and breakfast flakes. Based on the obtained results there were calculated effective weighted doses [nSv] from consumption of 1 kg of a product for different age groups.

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Journal of Radioanalytical and Nuclear Chemistry
Authors: J. Solecki, J. Solecki, J. Solecki, J. Solecki, S. Michalik, S. Michalik, S. Michalik, and S. Michalik

Summary  

The adsorption of 85Sr on grain fractions isolated from four different types of soil was studied. The influence of pH, concentration and presence of calcium ions on the process was investigated. The adsorption process depends mainly on pH, grain size of the solidandthe type of soil. Ca2+in the system is lowering the adsorption of 85Sr.

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Abstract  

The aim of this article was to present the studies of radiological level of some commercial dairy products in Mazovian, Kuyavian—Pomeranian and Lublin regions. They were carried out for 27 commercial dairy products such as two specimens of lean cottage cheese, three specimens of cottage cheese containing a limited percentage of fat, three specimens of fat cottage cheese, three specimens of milk containing 3.2% of fat, three specimens of milk containing 2.0% of fat, two specimens of sour cream containing 12% of fat, three specimens of sour cream containing 18% of fat, one specimen of 30% whipping cream, two specimens of homogenized (strawberry and vanilla) cheese, three specimens of hard rennet cheese, one specimen of powdered milk, one specimen of goat milk. For the given commercial dairy products there were calculated effective doses (μSv) obtained after consumption of 1 kg contaminated product for different age groups.

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Abstract  

Studies on the determination of transfer factors (TF) for 137Cs and 90Sr isotopes from soil to plant are presented. Experiments were performed on grass from meadows of Bug river valleys and vegetables from Zwierzyniec region. The influence of potassium and calcium on the transfer factor of both isotopes is discussed.

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Journal of Radioanalytical and Nuclear Chemistry
Authors: J. Solecki, J. Solecki, J. Solecki, S. Michalik, S. Michalik, and S. Michalik
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