Journal of Radioanalytical and Nuclear Chemistry最新文献

{"title":"Uranium isotopic signatures from Irati formation, Paraná sedimentary basin, Brazil","authors":"Gabrielle Roveratti,&nbsp;Daniel M. Bonotto","doi":"10.1007/s10967-026-10764-9","DOIUrl":"10.1007/s10967-026-10764-9","url":null,"abstract":"<div><p>This study investigates natural radioelements K (⁴⁰K), U (eU = ²²⁶Ra), Th (eTh = ²²⁸Th), and U-isotopes ²³⁸U and ²³⁴U in rocks of the Irati Formation (Passa Dois Group), Paraná Sedimentary Basin, Brazil, aiming to understand the consequences of water–rock interaction processes occurring there. Gamma-ray and alpha-spectrometry were applied to the analysis of rock and groundwater samples. The results confirm that lithology exerts a primary control, with shales showing higher U, Th, and K concentrations than limestones due to clay minerals’ adsorption capacity. Moreover, ²³⁴U/²³⁸U activity ratios in rocks were slightly above unity, suggesting recent ²³⁴U gain via water–rock interactions. In groundwater, however, ratios reached values as high as 27.9, indicating intense isotopic fractionation driven by α-recoil and preferential ²³⁴U leaching. Spatial variability in these ratios- from near-equilibrium values in oxidizing environments to extreme fractionation in confined aquifer zones reflects differences in groundwater residence time, redox conditions, and hydrologic confinement. Overall, this work demonstrates that the Passa Dois aquiclude is a heterogeneous hydrogeochemical system, where localized zones of high isotopic fractionation are governed by lithological variability and groundwater flow dynamics, providing a radiometric framework for understanding uranium mobility in sedimentary basins.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 4","pages":"2517 - 2532"},"PeriodicalIF":1.6,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10967-026-10764-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147735056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coprecipitation synthesis and thermoluminescence characterization of LiF:Cu phosphors: low-dose response and short-term fading study","authors":"Dewi Kartikasari,&nbsp;Adinda Lestari,&nbsp;Nunung Nuraeni,&nbsp;Sovian Aritonang,&nbsp;Budhy Kurniawan","doi":"10.1007/s10967-026-10805-3","DOIUrl":"10.1007/s10967-026-10805-3","url":null,"abstract":"<div><p>Copper-doped lithium fluoride (LiF:Cu) phosphors (0.1–1.0 mol% Cu) were synthesized by a coprecipitation method and evaluated for low-dose thermoluminescence (TL) under ⁹⁰Sr/⁹⁰Y β-irradiation in the range of 10–40 mGy. X-ray diffraction confirmed retention of the cubic LiF phase with slight peak shifts upon Cu incorporation, while SEM–EDS verified the presence of Cu in the doped powders. All LiF:Cu compositions exhibited a dominant dosimetric glow peak in the 150–220 °C range. The TL dose response was approximately linear for all doped samples; among the investigated compositions, LiF:Cu (0.1 mol%) exhibited the highest TL output and the best linearity based on linear regression fitting (R² = 0.9969), followed by LiF:Cu (1.0 mol%) (R² = 0.8952) and LiF:Cu (0.5 mol%) (R² = 0.7717), whereas undoped LiF remained near the measurement background (R² = 0.3141). The reported TL responses are presented as mean ±1 SD, where the error bars represent the standard deviation obtained from three independently prepared aliquots per dose point (n = 3). Peak-shape analysis yielded apparent activation energies in the range of 0.88–1.03 eV. Short-term fading was evaluated using the normalized integrated TL signal (I/I₀) over 50–300 °C during 7 days of storage at room temperature. After 7 days, I/I₀ values were 0.5123, 0.7255, and 0.8603 for 0.1, 0.5, and 1.0 mol% Cu, respectively (undoped LiF: 0.7594), indicating a sensitivity–stability trade-off under the present synthesis and readout conditions, relevant to prompt-readout low-dose TL dosimetry.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 4","pages":"2761 - 2772"},"PeriodicalIF":1.6,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147735081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research advances in metal-based compounds for the adsorption of radioactive Co2+ from aqueous solutions","authors":"Zeyu Guo,&nbsp;Xiaowei Wang,&nbsp;Jinfeng Men,&nbsp;Chengqiang Liang,&nbsp;Ping Bao,&nbsp;Yudong Xie,&nbsp;Biao Wang","doi":"10.1007/s10967-026-10796-1","DOIUrl":"10.1007/s10967-026-10796-1","url":null,"abstract":"<div><p>Efficient removal of radioactive Co²⁺ from wastewater is essential due to its long-term radiological hazards to ecosystems and human health. This review systematically summarizes recent advances in metal-based adsorbents, including metal oxide, metal hydroxides and layered double hydroxides, metal inorganic salt-based materials, and metal–organic frameworks (MOFs), by comparing their adsorption mechanisms, performance, and selectivity. It further highlights the promise of tailored and composite materials for effective cobalt remediation, offering valuable guidance for designing high-performance adsorbents for radioactive wastewater treatment.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 4","pages":"2707 - 2742"},"PeriodicalIF":1.6,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, characterisation and performance evaluation of silver-coated alumina for the sorption of iodine, iodide and iodate from aqueous streams","authors":"H. Seshadri,&nbsp;Krishan Kumar,&nbsp;Shrikant Padhy,&nbsp;Seik Mansoor Ali,&nbsp;D. K. Mohapatra","doi":"10.1007/s10967-026-10802-6","DOIUrl":"10.1007/s10967-026-10802-6","url":null,"abstract":"<div><p>Iodine species in aqueous streams inside the nuclear reactor containment pose significant challenges to nuclear safety due to their volatility and radiotoxicity, emphasising the importance of their efficient removal. In this study, silver-coated alumina was synthesised by wet impregnation, characterised by XRD, SEM–EDX, FTIR, Raman spectrum and evaluated as a sorbent for iodine, iodide, and iodate under simulated nuclear reactor conditions. Batch experiments demonstrated high sorption efficiency for iodine and iodide, while iodate removal was comparatively lower. Sorption efficiency was quantified using ion chromatography and distribution coefficient values confirmed the stronger affinity of iodine and iodide relative to iodate. Kinetic analysis indicated that iodide adsorption follows a pseudo-second-order model, while isotherm studies aligned with the Langmuir model, yielding a maximum adsorption capacity of 351 mg g⁻¹. The sorbent maintained performance across different pH conditions and under gamma irradiation, indicating excellent structural and radiation stability. Results indicate that silver-coated alumina is a highly effective sorbent for iodine species, particularly iodine and iodide, under simulated nuclear reactor conditions.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 4","pages":"2659 - 2670"},"PeriodicalIF":1.6,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of natural uranium and thorium levels in environmental matrices surrounding uranium mining sites via ICP-MS","authors":"Joel Augusto Moura Porto,&nbsp;Lander de Jesus Alves,&nbsp;Hector Hugo Silva Medrado,&nbsp;Josilene da Silva Rocha,&nbsp;Rodrigo Gibaut de Souza Gois,&nbsp;Fábio Carvalho Nunes,&nbsp;Marcelo Machado Viana,&nbsp;Ana Paula de Carvalho Teixeira","doi":"10.1007/s10967-026-10785-4","DOIUrl":"10.1007/s10967-026-10785-4","url":null,"abstract":"<div><p>This study quantified natural uranium and thorium concentrations in environmental matrices surrounding a uranium mining area in Brazil and evaluated the distribution of uranium and thorium radionuclides in ores, waters, and soils from the Cachoeira and Engenho mines. Distinct geochemical signatures were observed between the mines, with lower uranium-to-thorium ratios at Engenho. While thorium levels in ores were lower than commonly reported, elevated concentrations in aqueous samples suggest strong geological and hydrological controls. Agricultural soils showed moderately enhanced thorium, indicating limited mining influence.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 4","pages":"2533 - 2549"},"PeriodicalIF":1.6,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10967-026-10785-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of soil-soil solution distribution coefficients of 137Cs using agricultural soils collected from two different temperature regions in Japan","authors":"Sergei Danilov,&nbsp;Keiko Tagami,&nbsp;Shigeo Uchida","doi":"10.1007/s10967-026-10799-y","DOIUrl":"10.1007/s10967-026-10799-y","url":null,"abstract":"<div><p>Soil-soil solution distribution coefficients (<i>K</i>_d) for ¹³⁷Cs in soils (Andosol, Fluvisol, and Cambisol) from two different temperature regions in Japan were measured. The results showed that the <i>K</i>_d values did not differ significantly between warmer and cooler regions for Fluvisol and Cambisol samples, while Andosol samples showed a small but statistically significant regional difference (geometric means: 4.7 × 10³ L kg^–1 in the cooler region and 2.0 × 10³ L kg^–1 in the warmer region). Correlation analysis revealed that <i>K</i>_d was mainly affected by exchangeable K, water content, and pH, suggesting that site-specific soil characteristics have a greater impact on radiocesium mobility than temperature differences.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 4","pages":"2649 - 2657"},"PeriodicalIF":1.6,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147735006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radionuclide sequential sampling of Spring 1974 and 1977 thunderstorms","authors":"Kenneth G. W. Inn,&nbsp;Paul K. Kuroda,&nbsp;Robert Holloway,&nbsp;Muralidhara Gavini,&nbsp;William Raines,&nbsp;Michael Flanders,&nbsp;Carl Harris,&nbsp;Neal G. Sumerlin,&nbsp;James N. Beck","doi":"10.1007/s10967-026-10767-6","DOIUrl":"10.1007/s10967-026-10767-6","url":null,"abstract":"<div><p>This study integrates natural RaDEF radionuclide chronometry with fission‑product fallout diagnostics to reconstruct the dynamic histories of three thunderstorms sampled in 1974 and 1977. Using sequential precipitation fractions, isotope concentrations and ratios reveal when storm variables such as updraft structure, cell regeneration, downdrafts, and boundary‑layer surges dominated aerosol sourcing. The combined diagnostics show that each storm accessed distinct radioactive aerosol reservoirs at different times, enabling high‑resolution reconstruction of storm evolution. This work demonstrates the novelty and power of multi‑isotope forensic methods for decoding convective storm dynamics.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 3","pages":"2251 - 2266"},"PeriodicalIF":1.6,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147631836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the electrolytic reduction of kilogram-scale U3O8 in molten LiCl","authors":"Benlin Yao,&nbsp;Guangzhi Ren,&nbsp;Hongwei Jia,&nbsp;Mingshuai Yang,&nbsp;Xun Li,&nbsp;Xiao Liu,&nbsp;Jing Sun,&nbsp;Sijing Liu,&nbsp;Yiqun Xiao,&nbsp;Zhaokai Meng,&nbsp;Peng Song,&nbsp;Hui Chen,&nbsp;Qiuyue Zhang,&nbsp;Lei Zhang,&nbsp;Rushan Lin,&nbsp;Guoan Ye,&nbsp;Hui He","doi":"10.1007/s10967-026-10791-6","DOIUrl":"10.1007/s10967-026-10791-6","url":null,"abstract":"<div><p>This study investigated the electrolytic reduction of kilogram-scale U₃O₈ pellets in molten LiCl and focused on optimizing the process for nuclear fuel cycle applications. Critical developments included resolving carbon impurity issues in LiCl, implementing a sequential kerosene-cyclohexane washing process at 150 °C for lithium anode pretreatment, and establishing optimal pellet fabrication parameters. By adjusting the sintering atmosphere, the pellet density (4.5–8.5 g/cm³) and chemical composition (U₃O₈ or U₄O₉) could be controlled. The electrolytic reduction used a stainless-steel cathode basket loaded with sintered pellets and a lithium metal counter electrode. The experiment was conducted in an inert-atmosphere glove box for 181h. The results showed reduction extents of 99.09% for U₃O₈ and 99.17% for U₄O₉, a uranium metal production rate of 55.7 gU/h, and a current efficiency of 56.1%. X-ray diffraction analysis confirmed that the primary reduction products were metallic uranium and uranium carbide.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 4","pages":"2613 - 2624"},"PeriodicalIF":1.6,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Silica and chitosan synergistically modified biochar composite with excellent antibacterial activity for efficient and selective U (VI) adsorption from seawater","authors":"Long-Hua Zhou,&nbsp;Xin-Chen Lin,&nbsp;Shan Du,&nbsp;Hui Li,&nbsp;Yong-Jiu Jin,&nbsp;Zong-Bo Xie,&nbsp;Zhang-Gao Le","doi":"10.1007/s10967-026-10790-7","DOIUrl":"10.1007/s10967-026-10790-7","url":null,"abstract":"<div><p>Uranium recovery from seawater offers a sustainable solution for long-term nuclear fuel supply. A novel silica and chitosan synergistically modified biochar composite (OBC-Si-CS) with antibacterial properties was developed for efficient and selective uranium(VI) adsorption from natural seawater. The material exhibited a high adsorption capacity, excellent reusability, and significant selectivity for uranium, while resisting interference from common metal ions and rare earth elements. OBC-Si-CS demonstrated a 100% inhibition rate against <i>V. parahaemolyticus</i> and <i>V. vulnificus</i>, and showed promising adsorption performance in dynamic tests with low-concentration uranium-spiked seawater, offering significant potential for large-scale uranium extraction from marine environments.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 4","pages":"2551 - 2565"},"PeriodicalIF":1.6,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147735085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Superior radiosensitization with samarium-doped TiO₂ nanoparticles: enhanced dose delivery and clinical potential in radiotherapy","authors":"Omar Gahbiche,&nbsp;Ridha Ajjel,&nbsp;Tariq Altalhi,&nbsp;Amine Mezni","doi":"10.1007/s10967-026-10798-z","DOIUrl":"10.1007/s10967-026-10798-z","url":null,"abstract":"<div><p>This study investigates the potential of samarium (Sm)- and gadolinium (Gd)-doped titanium dioxide (TiO₂) nanoparticles as novel radiosensitizers to enhance radiation dose delivery in clinical radiotherapy. Leveraging the high atomic numbers of Sm and Gd, these nanoparticles increase ionization within tumors, improving radiation effectiveness while sparing surrounding healthy tissues. TiO₂ nanoparticles, known for their photocatalytic properties, further enhance radiosensitization by generating reactive oxygen species (ROS) upon irradiation. The nanoparticles were synthesized via a cost-effective solvothermal method and characterized using X-ray Diffraction (XRD) for crystal structure and phase composition, Transmission Electron Microscopy (TEM) and High-Resolution TEM (HR-TEM) for morphological analysis and nanostructure imaging, and X-ray Photoelectron Spectroscopy (XPS) for elemental composition and oxidation state determination. Their performance was evaluated under clinical radiotherapy conditions, including intensity-modulated radiotherapy (IMRT), volumetric modulated arc therapy (VMAT), 3D conformal radiotherapy (3D-CRT), and stereotactic radiosurgery (SRS). Results demonstrated that Sm-doped TiO₂ (TiO₂:Sm) consistently outperformed Gd-doped TiO₂ (TiO₂:Gd), achieving up to a 14.27% dose increase with 12 MeV electron beams. The highest dose enhancements were observed at shorter source-to-measurement point distances (SMPDs), with consistent performance across varying field sizes. Clinical simulations confirmed the potential of TiO₂:Sm for improving tumor targeting efficiency, particularly in prostate cancer radiotherapy, although efficacy varied in stereotactic treatments. These findings position TiO₂:Sm as a promising radiosensitizer, offering a pathway toward more effective and personalized cancer treatments. By enhancing local dose deposition and minimizing damage to healthy tissues, TiO₂:Sm nanoparticles have the potential to revolutionize radiotherapy protocols and improve patient outcomes.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 4","pages":"2583 - 2594"},"PeriodicalIF":1.6,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147735086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}