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1.
Oxidative hydrolysis of 137Cs131I aerosols localized on TRUMEM metallic membrane filter under the action of air-water vapor medium was studied. It was shown that, at a temperature of air flow of 403–423 K, water vapor content from ~3–4 to 90 vol%, and flow velocity from ~2 to ~9 cm s?1 the 137Cs131I aerosols localized on TRUMEM metallic membrane filter undergo oxidative hydrolysis. In sublimation of 0.3 to 0.8 mg of CsI, the degree of conversion of CsI radioaerosols into oxidative hydrolysis products varies from 0 to approximately 17%. 相似文献
2.
Gorbacheva M. P. Krasavina E. P. Mizina L. V. Rumer I. A. Krapukhin V. B. Kulemin V. V. Lavrikov V. A. Kulyukhin S. A. 《Theoretical Foundations of Chemical Engineering》2019,53(4):638-642
Theoretical Foundations of Chemical Engineering - Findings from a study of the N2O absorption from an air flow in various aqueous and organic solutions at 293–298 K were reported. The maximum... 相似文献
3.
Sorption of CH3
131I from a water vapor-air medium on porous inorganic sorbents based on silica gel of KSKG grade and containing triethylenediamine
(CH2-CH2)3N2 and d element nitrates was studied. The sorbents prepared by impregnation with (CH2-CH2)3N2 and Zn, Ni, and Cu nitrates from aqueous solution recover CH3
131I from a water vapor-air flow poorly (degree of recovery <10%). Calcination of the sorbents at temperatures exceeding 250°C
does not noticeably affect their sorption power. Heating of the complex Ag(NO3)(OH)·(CH2-CH2)3N2H to 160°C causes its exothermic decomposition with a large heat release and formation of metallic silver. Thermal decomposition
of the complex of Cu2+ with (CH2-CH2)3N2, synthesized from an aqueous solution at the molar ratio Cu(NO3)2: (CH2-CH2)3N2 = 1: 2, occurs similarly. 相似文献
4.
S. A. Kulyukhin L. V. Mizina M. P. Gorbacheva I. A. Rumer V. A. Lomovskoi E. I. Saunin 《Radiochemistry》2014,56(2):177-182
The removal of 131I and 137Cs from aqueous and aqueous-organic solutions with porous polyvinyl formal (PPVF) was studied. The degree of radionuclide removal from water with a PPVF sample is determined by the amount of water absorbed by the polymer and is not influenced by the concentration of salts in solution. Porous polyvinyl formal allows recovering 137Cs from aqueous-organic solutions with 70 to 99% efficiency. 相似文献
5.
N. B. Mikheev S. A. Kulyukhin A. N. Kamenskaya I. A. Rumer N. A. Konovalova 《Radiochemistry》2004,46(4):324-339
Studies on the title subject, published mainly in the second half of the XX century and made both with macroamounts of lanthanides (Ln) and actinides (An) and with micro- and ultramicroamounts of radionuclides of these elements, are considered. Procedures for preparing f elements in lower oxidation states in solutions, melts, and solid matrices and methods for identifying these states (electrochemistry, spectrometry, high-temperature extraction, cocrystallization, etc.) are discussed. 相似文献
6.
Sorption of CH3 131I from water vapor-air medium on Fizkhimin and Siloksid inorganic sorbents and on SKT-3I activated carbon was studied. The sorption power of Fizkhimin, Siloksid, and SKT-3I sorbents toward CH3 131I was examined (1) after their 20-h contract with water, followed by removal of the liquid phase and drying at 110°C; (2) after 4-h treatment with steam (95–98°C), followed by drying at 25°C; (3) after keeping for 9 months in 100% humid air at ambient temperature of 10 to 45°C; and (4) after treatment with a water vapor-air flow (95–98°C, 60–80 vol % water vapor) for 2 h. In most cases, Fizkhimin sorbent and SKT-3I activated carbon preserve high sorption efficiency toward CH3 131I from water vapor-air flow. 相似文献
7.
Coprecipitation of 60Co microamounts from aqueous solutions with sulfides of d elements (Cu2+, Ni2+, Co2+) in the presence of 10?2 M EDTA was studied. Under these conditions, the initial solution can be efficiently decontaminated from 60Co by its coprecipitation with NiS. The degree of coprecipitation of 60Co microamounts with NiS exceeds 95% at [Na2S]: [Ni2+] = (5–10): 1. 相似文献
8.
Kulyukhin S. A. Krasavina E. P. Mizina L. V. Krapukhin V. B. Kulemin V. V. Rumer I. A. Tanashchuk N. V. 《Radiochemistry》2004,46(2):161-164
Sorption of the 131I-, 131IO3
-, and F- ions on various samples of hydroxyapatite (HAP) from aqueous solutions was studied. The HAP samples were prepared by the following reactions: Ca(OH)2 + H3PO4 HAP, CACl2 + Na3PO4 + NaOH HAP, and Ca(NO3)2 + HAP seed + (NH4)2HPO4 + NH3 HAP. None of the HAP samples sorb ionic species of radioactive iodine from aqueous solutions. As for F-, the best sorption properties are exhibited by the HAP sample prepared by the second reaction. The degree of recovery of fluoride ion with the HAP precipitate in 5 min, 4 h, and 5 days of the contact of the solid and liquid phases is 54, 66, and >95% of the initial F- amount, respectively. The distribution factor K
d of the fluoride ion between the HAP solid phase and solution decreases with increasing V/m ratio and pH of the initial solution. 相似文献
9.
Thermal decomposition of a volatile organic compound of radioactive iodine, methyl iodide CH3 131I, in a gas flow in the presence of various modifications of granulated materials based on KSKG silica gel impregnated with d elements was studied. Under comparable experimental conditions, 97–99% decomposition of CH3 131I is achieved at 770 ± 15°C without sorbents and at 540 ± 10 and 465 ± 20°C in the presence of straight KSKG silica gel and of the material based on it, impregnated with compounds of Ni or its mixture with Cu (8–10 wt %), respectively. 相似文献
10.
N. B. Mikheev V. V. Kulemin V. A. Lavrikov I. V. Melikhov I. A. Rumer S. A. Kulyukhin 《Radiochemistry》2012,54(3):258-263
The behavior of radioaerosols formed by condensation of supersaturated 137Cs131I and/or 137CsOH vapor in an electrostatic field was studied. Supersaturated 137Cs131I and/or 137CsOH vapor was generated by evaporation of salt crystals from a metal surface heated to high temperatures owing to ohmic resistance. By applying additional potential to the aerosol generator, it is possible to control the behavior of 137Cs131I, 137CsOH, or 137Cs131I + 137CsOH aerosols in an electrostatic field. 相似文献