Radiochemistry最新文献_第10页

Determination of the Fractionation Coefficient of Cesium-137 in an Aqueous Aerosol under Laboratory Condiotions 实验室条件下含水气溶胶中铯-137分馏系数的测定

IF 0.9

Radiochemistry Pub Date : 2024-12-11 DOI: 10.1134/S106636222405014X

K. Yu. Mokrov

{"title":"Determination of the Fractionation Coefficient of Cesium-137 in an Aqueous Aerosol under Laboratory Condiotions","authors":"K. Yu. Mokrov","doi":"10.1134/S106636222405014X","DOIUrl":"10.1134/S106636222405014X","url":null,"abstract":"It is known that the concentration ratio of chemical elements in an aqueous aerosol (AA) can differ significantly from that of the same elements in the aqueous medium (AM) from which this AA was formed. Different accumulation (fractionation) of elements in AA occurs in the surface microlayer of water and is observed only for water-soluble microimpurities, whereas dissolved salts present in macroscopic concentrations undergo no accumulation. For radionuclides, the relative fractionation coefficient F(X/Cs) is defined as the degree of accumulation of the activity of radionuclide X in AA relative to another, reference radionuclide (137Cs). The values of F(X/Cs) were determined previously under natural conditions in the region of V-9 intermediate-level liquid radioactive waste storage reservoir (Lake Karachay) by analyzing the ratio of the volume activities of the radionuclides in water, RW(Cs/X), and in AA (in air), RA(Cs/X): F(X/Cs) = RA(Cs/X)/RW(Cs/X). Attempts to estimate the absolute fractionation coefficient of 137Cs, F(Cs), in AA relative to its content in AM failed. A procedure was suggested for determining the absolute fractionation coefficient of 137Cs, F(Cs), in AA relative to its content in AM under laboratory conditions. The procedure was tested with a model AM with the parameters close to those of V-9 reservoir (137Cs volume activity 0.17 MBq/L, dry residue ~10 g/L). The integral value of F(137Cs) for the model AM (for all the aqueous aerosol particles of size smaller than ~100 μm) varied from 4.4 to 6.5.","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 5","pages":"702 - 708"},"PeriodicalIF":0.9,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal Temperatures and Dose Rates in Radiation-Thermal Processing of Oil Bitumen Sands 沥青砂辐射热加工的最佳温度和剂量率

IF 0.9

Radiochemistry Pub Date : 2024-12-11 DOI: 10.1134/S1066362224050102

L. Yu. Jabbarova, I. I. Mustafaev

引用次数: 0

137Cs Sorption on the Loams of the Republic of Belarus 137Cs关于白俄罗斯共和国土地的吸收

IF 0.9

Radiochemistry Pub Date : 2024-12-11 DOI: 10.1134/S1066362224050114

A. A. Baklay, N. A. Makovskaya, T. G. Leontieva, D. A. Kuzmuk, A. S. Onischuk, L. N. Mаskalchuk

{"title":"137Cs Sorption on the Loams of the Republic of Belarus","authors":"A. A. Baklay, N. A. Makovskaya, T. G. Leontieva, D. A. Kuzmuk, A. S. Onischuk, L. N. Mаskalchuk","doi":"10.1134/S1066362224050114","DOIUrl":"10.1134/S1066362224050114","url":null,"abstract":"It was established that the content of the main clay minerals in the loam sample from the Fanipolskoye deposit is 13.6 wt % for montmorillonite and 3.3 wt % for illite. It was determined that the pH of solution in the range of 4–12 has virtually no effect on 137Cs+ sorption by the loam. The distribution coefficient (Kd) of 137Cs for the specified loam sample with a K+ concentration in the solution of up to 0.01 mol/dm3 is higher than 103 dm3/kg, which indicates that the 137Cs sorption is efficient. The loam contains two types of sorption sites, T1 and T2, with different selectivity and capacity toward Cs+. The sorption capacities of sites T1 and T2 for Cs are 4.0 × 10–5 and 1.2 × 10–2 mol/kg, respectively, and the values of Kd of Cs for these sites differ by a factor of 20 and are 1.6 × 104 and 7.9 × 102 dm3/kg. The loam from the Fanipolskoye deposit is shown to be suitable as a buffer backfill for the disposal site of very low-level radioactive waste from the Belarusian NPP.","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 5","pages":"663 - 668"},"PeriodicalIF":0.9,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Obtaining Nitric Acid Solutions of Uranyl at Deficiency of NO3– Anions 缺乏NO3 -阴离子条件下铀酰硝酸溶液的制备

IF 0.9

Radiochemistry Pub Date : 2024-12-11 DOI: 10.1134/S1066362224050035

V. L. Sofronov, V. A. Lavrentyev

引用次数: 0

Sorption Statics of Cr(VI), Mo(VI), W(VI), Se(IV) Oxygen Anions by Nanostructured Al2O3||C Composite 纳米Al2O3|| - C复合材料对Cr（VI）、Mo（VI）、W（VI）、Se（IV）氧阴离子的吸附静力学

IF 0.9

Radiochemistry Pub Date : 2024-12-11 DOI: 10.1134/S1066362224050126

Е. V. Polyakov, V. N. Krasilnikov, I. V. Volkov, A. A. Ioshin

{"title":"Sorption Statics of Cr(VI), Mo(VI), W(VI), Se(IV) Oxygen Anions by Nanostructured Al2O3||C Composite","authors":"Е. V. Polyakov, V. N. Krasilnikov, I. V. Volkov, A. A. Ioshin","doi":"10.1134/S1066362224050126","DOIUrl":"10.1134/S1066362224050126","url":null,"abstract":"By the methods of thermodynamic modeling, sorption diagnostics, analysis of particle zeta-potential, and UV-Vis spectrometry the equilibrium conditions of sorption interaction of CrO42–, MoO42–, WO42–, SeO32– oxygen anions in the region of chemical stability of Al2O3||C composite have been analyzed. The anion sorption isotherms are shown to follow the Langmuir model for a monoenergetic sorbent. The Henry region is observed at concentrations less than 1 μM. According to the established mechanism of surface complexation, the value of anions protonation constant (K1) in the investigated pH range determines the sorption activity of the composite to these anions. This explains the correlation found between the ratio of parameters of acid–base sites {Al–O–}, {Al–HO0}, and {Al–OH2+} of composite KM(1,2) and the protonation constant of anion K1. It is shown that the Al2O3||C composite concentrates from dilute solutions both cations of d-, f-elements and oxygen anions of d-elements with the value of log Kd [mL/g] > 4, thereby exhibiting the properties of collective action sorbent.","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 5","pages":"669 - 678"},"PeriodicalIF":0.9,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal Degradation of Organic Compounds in Radioactive Suspensions 放射性悬浮液中有机化合物的热降解

IF 0.9

Radiochemistry Pub Date : 2024-12-11 DOI: 10.1134/S1066362224050138

P. A. Bobrov, N. V. Silich, N. P. Starovoitov, S. V. Korenev

引用次数: 0

A Statistical Evaluation of the Chemical Analysis, Magnetic Properties, and Radioactive Factors in Sand from the Cauvery and Palar Rivers, Tamil Nadu, India 印度泰米尔纳德邦Cauvery河和Palar河沙的化学分析、磁性和放射性因素的统计评价

IF 0.9

Radiochemistry Pub Date : 2024-12-11 DOI: 10.1134/S1066362224050217

A. Gayathri, S. Murugesan

{"title":"A Statistical Evaluation of the Chemical Analysis, Magnetic Properties, and Radioactive Factors in Sand from the Cauvery and Palar Rivers, Tamil Nadu, India","authors":"A. Gayathri, S. Murugesan","doi":"10.1134/S1066362224050217","DOIUrl":"10.1134/S1066362224050217","url":null,"abstract":"The Cauvery and Palar are two significant rivers in Tamil Nadu, India. These rivers produce electricity and water for drinking and irrigation and provide sand for building construction. Uranium, thorium, and potassium are examples of naturally occurring radioactive elements that have been studied for Cauvery and Palar river soil. The radiation levels and possible human exposure were measured using specialized equipment. The annual radiation dose and the amount of radiation that the body absorbs both indoors and outdoors were other factors examined in the study. Several risk indicators were also evaluated to determine the possible health risks associated with this radiation. According to the study, most of radioactive levels in the rivers fall within the usual range compared to worldwide averages. It indicates that there is no substantial radioactive risk in the Cauvery River (except from site number 20). The radiation levels in site no. 6 of Palar River are three times higher than the global average, indicating a slight increase in radiation levels. Metals including copper, zinc, nickel, chromium, and iron were also examined. The correlations between these elements in the riverbeds with magnetic characteristics, radiation exposure levels, and possible dangers was also studied. The comprehension of the distribution of radiation and its relationship to other environmental factors was aided by this analysis.","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 5","pages":"752 - 763"},"PeriodicalIF":0.9,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sorption of Uranium, Neptunium, and Plutonium onto Pyrite, Siderite, and Hematite after Their Microbial Transformation under the Conditions of Upper Aquifers 上含水层条件下微生物转化后的铀、镎、钚在黄铁矿、菱铁矿和赤铁矿上的吸附

IF 0.9

Radiochemistry Pub Date : 2024-12-11 DOI: 10.1134/S1066362224050230

G. D. Artem’ev, Yu. V. Konevnik, A. P. Novikov, A. V. Safonov

引用次数: 0

Support Loading Effect on Extraction Chromatography Separation of Ytterbium and Lutetium Using 2-Ethylhexylphosphonic Acid Mono-2-ethylhexyl Ester Based Sorbent 载体负载对2-乙基己基膦酸单-2-乙基己基酯基吸附剂萃取色谱分离镱和镥的影响

IF 0.9

Radiochemistry Pub Date : 2024-12-11 DOI: 10.1134/S1066362224050072

K. S. Bobrovskaya, R. A. Kuznetsov, M. N. Lisova, A. N. Fomin

引用次数: 0

Erratum to: Preparation of High-Labeled Graphene Oxide by Tritium Thermal Activation Method Application for in the Betavoltaic Cell of a Nuclear Battery 用氚热活化法制备高标记氧化石墨烯在核电池倍他伏打电池中的应用