Description:    A procedure based on nuclear-chemical generation of free nucleogenic reactive species was developed for the synthesis of difluorobenzene double-labeled with tritium as a precursor for the generation of previously unknown difluorophenyl cations. Content Type Journal Article Pages 506-508 DOI 10.1134/S1066362212050165 Authors V. V. Avrorin, St. Petersburg State University, St. Petersburg, Russia N. E. Shchepina, Natural Science Institute, Perm State National Research University, ul. Genkelya 4, Perm, 614990 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Zirconyl molybdopyrophosphate (ZMPP) inorganic ion exchanger was synthesized by precipitation and used for preparing a 60 Co sealed source. The distribution coefficient of 60 Co(II) ions on ZMPP was determined in relation to the HCl concentration. The saturation capacity of ZMPP for 60 Co(II) was determined by the batch method to be 1.33 mmol g −1 . The ZMPP ion exchanger was loaded with 60 Co radionuclides by equilibrating a 60 Co solution with 1 g of ZMPP at pH 5 (HCl) for 48 h at 25 ± 1°C. A sealed source of 1.04 μCi 60 Co (±5%) was prepared by packing 100 mg of the loaded matrix in the cylindrical cavity of a Chinese Artelone capsule. After radiometric standardization and encapsulation, the sealed source was submitted to quality control tests and finally checked radiometrically before release to the local market for calibration of radiation measurements and identification instruments. Content Type Journal Article Pages 492-496 DOI 10.1134/S106636221205013X Authors S. A. Shady, Nuclear Fuel Technology Department, Hot Laboratories Center, Atomic Energy Authority, P.O. 13759, Cairo, Egypt Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Correlation between the yield of free radicals in radiolysis of organic substances and the physicochemical characteristics of these substances can be quantitatively formulated in the form of multiparameter equations based on the linear free energy relationship. The major effect is exerted by the parameters of the capability of liquids for specific interactions. Content Type Journal Article Pages 509-510 DOI 10.1134/S1066362212050177 Authors R. G. Makitra, Department of Physical Chemistry of Fossil Fuels, Litvinenko Institute of Physical Organic and Coal Chemistry, National Academy of Sciences of Ukraine, ul. Nauchnaya 3a, Lviv, 79060 Ukraine G. G. Midyana, Department of Physical Chemistry of Fossil Fuels, Litvinenko Institute of Physical Organic and Coal Chemistry, National Academy of Sciences of Ukraine, ul. Nauchnaya 3a, Lviv, 79060 Ukraine E. Ya. Pal’chikova, Institute of Geology and Geochemistry of Fossil Fuels, National Academy of Sciences of Ukraine, Lviv, Ukraine Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    The performance of certain rocks (shungite, vermiculite, montmorillonite) in chemical water treatment is evaluated. Vermiculite packing ensures high efficiency of water decontamination from 137 Cs. Content Type Journal Article Pages 489-491 DOI 10.1134/S10663622120500128 Authors G. A. Skorobogatov, Chemical Faculty, St. Petersburg State University, Universitetskii pr. 26, St. Petersburg, 198504 Russia V. V. Eremin, Chemical Faculty, St. Petersburg State University, Universitetskii pr. 26, St. Petersburg, 198504 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    The radiation hazard of the Klivazh object (Yunkom mine, Enakievo, Donetsk oblast, Ukraine) was evaluated, alternative ways of the mine decommissioning were considered, and the radiation hazard of the mine flooding was assessed. Specimens simulating the virtified glass-ceramic melt formed by the nuclear explosion were fabricated, and their chemical resistance (solubility) was examined by leaching of U, Cs, and Sr. The U, Cs, and Sr concentrations in water flowing over the explosion cavity were determined. When the tunnels of only two lower horizons (936 and 826 m) will be flooded, the radionuclide concentrations in the mine water will not exceed 10 −4 PC C ingest (PC C ingest is the permissible concentration in potable water for population, established in the Ukraine). Content Type Journal Article Pages 516-520 DOI 10.1134/S1066362212050190 Authors V. N. Bondarenko, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine A. V. Goncharov, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine Yu. A. Gordienko, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine A. V. Mazilov, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine B. N. Razsukovannyi, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine S. Yu. Saenko, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine V. I. Sukhostavets, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine A. G. Tolstolutskii, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine V. N. Tkachenko, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    1-Naphthylcarbamoylmethyliminodiacetic acid (NIDA) and diphenylmethylcarbamoylmethyliminodiacetic acid (DMIDA) were synthesized, characterized, and labeled with 99 m Tc using SnCl 2 as reducing agent. The parameters affecting the yield of 99 m Tc-NIDA and 99 m Tc-DMIDA were studied in detail. The optimum conditions ensuring high yield of 99 m Tc-NIDA (94.2 ± 2%) and 99 m Tc-DMIDA (93.1 ± 2%) are as follows: 30 mg of NIDA or DMIDA, 0.3 mg of SnCl 2 ·H 2 O, pH 6, 15 min. The biodistribution in mice injected with 99 m Tc-NIDA and 99 m Tc-DMIDA showed high liver uptake at 10 min post injection, with fast biliary excretion. Accumulation of the activity in kidneys was negligible, especially after a long time post injection. Both 99 m Tc-NIDA and 99 m Tc-DMIDA can be applied as hepatobiliary imaging agents for the evaluation of the functional status of the hepatocytes and the patency of the biliary duct. Content Type Journal Article Pages 501-505 DOI 10.1134/S1066362212050153 Authors M. A. Motaleb, Labeled Compounds Department, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt H. El-Said, Radioactive Isotopes and Generator Department, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt M. Abdallah, Faculty of Science, Zagazig University, Cairo, Egypt M. Atef, Radioactive Isotopes and Generator Department, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    The possibility of preparing by self-propagating high-temperature synthesis (SHS) metal-ceramic (cermet) matrices with simulated wastes of REE-actinide fraction and Tc was examined. The specimens consist of oxide crystalline phases, glass, and melts. In the aluminate composite, the component (Sm) simulating the REE-actinide fraction is in the garnet and glass phases, and in the titanate composite, in the pyrochlore, titanosilicate of perrierite structure, and glass phases. Rhenium (Tc simulator) is incorporated in alloy phases. To evaluate the prospects for radioactive waste immobilization by SHS, it is necessary to synthesize matrices containing actinide isotopes (Am) and Tc and to study their structure and isolation properties. Content Type Journal Article Pages 511-515 DOI 10.1134/S1066362212050189 Authors N. P. Laverov, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia S. V. Yudintsev, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia E. E. Konovalov, Leipunskii Institute of Energy Physics, State Scientific Center of the Russian Federation, Federal State Unitary Enterprise, Obninsk, Kaluga oblast, Russia M. S. Nikol’skii, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia T. O. Mishevets, Leipunskii Institute of Energy Physics, State Scientific Center of the Russian Federation, Federal State Unitary Enterprise, Obninsk, Kaluga oblast, Russia B. S. Nikonov, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia B. I. Omel’yanenko, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Analysis of published data on the stability of Ln 2+ and An 2+ in deaerated aqueous solutions and in solutions of tetrahydrofuran, hexamethylphosphoric triamide, and other solvents shows that the oxidation, following a first-order rate law, involves thermal excitation of the bivalent ion, fast formation of a complex of the excited and unexcited ions (excimer), and its decomposition into fragments, i.e.,. Ln 3+ or An 3+ and H 2 . Content Type Journal Article Pages 452-454 DOI 10.1134/S1066362212050050 Authors V. P. Shilov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. V. Gogolev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    A method was suggested for studying the dynamic sorption properties of ferrocyanide sorbents toward Cs radionuclides by analyzing the radiocesium distribution in the solid phase of the sorbent. The dynamic sorption characteristics are determined by measuring the activity of successive sorbent layers after passing definite volumes of the solution. The method is efficient in analysis of the stability of various sorbents in liquid media. The sorption characteristics of the following ferrocyanide sorbents were examined: Termoksid-35 (nickel-potassium ferrocyanide on zirconium hydroxide), FNS-2 (nickel-potassium ferrocyanide on silica), and FS-2 (copper-potassium ferrocyanide on silica). In alkaline solutions, Termoksid-35 is the most stable. The effect of oxalic acid on the activity distribution in a ferrocyanide sorbent bed was studied. In alkaline solutions containing oxalic acid, copper ferrocyanide (FS-2) is the least stable. At the same time, at low pH values and in the absence of oxalic acid, it is preferable to use sorbents based on copper ferrocyanides. Content Type Journal Article Pages 483-488 DOI 10.1134/S1066362212050116 Authors A. M. Egorin, Institute of Chemistry, Far-Eastern Division, Russian Academy of Sciences, pr. 100-Letiya Vladivostoka 159, Vladivostok, 690022 Russia V. A. Avramenko, Institute of Chemistry, Far-Eastern Division, Russian Academy of Sciences, pr. 100-Letiya Vladivostoka 159, Vladivostok, 690022 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Published data on precision spectorphotometric determination of U, Th, Pu, and other elements of the nuclear fuel cycle in solutions on a two-channel analyzer with the relative random uncertainty S r = 0.1–0.2% are summarized. The method was used for certification and fabrication of Pu and U total weight fraction standards for mass spectrometer calibration. New data on precision determination of U, Ru, Er, Gd, Sm, Re, and Tc on serial Shimadzu UV devices in the photometric mode with the relative random uncertainty S r = 0.02–0.04% are presented. The relative total uncertainty that can be attained with the spectrophotometric method is as low as 0.03–0.05%, which makes this method competitive with other precision methods used. Content Type Journal Article Pages 419-430 DOI 10.1134/S1066362212050013 Authors S. A. Nikitina, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia T. D. Gogoleva, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia S. N. Voronina, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5