Journal of Radioanalytical and Nuclear Chemistry This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Assessment of exhalation rates of radon and thoron in soil from the Jaunsar-Bawar region of the Indian Himalayas
AbstractThis research investigates exhalation rates of radon (222Rn) and thoron (220Rn) from soil samples in the Jaunsar-Bawar region of the Indian Himalayas. Before sampling, gamma radiation rates were evaluated, ranging from 0.08 to 0.33  µSv/h. The observed222Rn mass exhalation rates range between 3.56 and 82.08  mBq/kg/h, with an average of 25.67 mBq/kg/h. Additionally, the surface exhalation rate of220Rn varies from 1.28 to 22.69  Bq/m2/s, averaging 7.90  Bq/m2/s. Projected220Rn mass emission rates span 154 –2356 mBq/kg/s, with a mean of 939 mBq/kg/s. The dataset analysis employs best-fit statistics, reveali...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 29, 2024 Category: Nuclear Medicine Source Type: research

Estimation of soil Rn-222 exhalation rate and its dependence on meteorological parameters in Purulia District, West Bengal, India
AbstractThe present study deals with the observation of Rn-222 emanation process in terms of its exhalation rate for 48  h from sub-surface soil at 3 h intervals, using a continuous Rn-222 monitoring system RAD7 at Sidho-Kanho-Birsha University campus in Purulia district, located in the easternmost part of the Chotanagpur Plateau, India based on local weather conditions, over five different seasons. For every seaso n, the diurnal variations of the Rn-222 exhalation rate increase after sunset, reaching to its maximum at mid-night and thereafter starts decreasing until it falls to the minimum around noon time. Local meteor...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 28, 2024 Category: Nuclear Medicine Source Type: research

γ-Ray radiolysis of dihydroxyurea in water and its radiolytic by-products
AbstractDihydroxyurea (DHU) is a novel salt-free reductant used in the reprocessing of spent fuel. This paper reports on the radiolysis of DHU in water and its radiolytic products. The concentration reduction ratio of DHU after irradiation increases with the dose but decreases with increasing DHU concentration. The radiolytic by-products are H2, CO2 NH4+ and HNO2. The amount of H2, CO2 and NH4+ increases with DHU concentration, but that of HNO2 decreases with increasing DHU concentration. The quantity of CO2 and NH4+ increases with the dose. The radiation chemical yields of DHU destruction and radiolytic products are deter...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 28, 2024 Category: Nuclear Medicine Source Type: research

Activated carbon treated with different chemical agents for pertechnetate adsorption
AbstractThe study investigated the adsorption behaviour of different activated carbon samples for pertechnetate under diverse conditions. Characterizations of A-CF-F and A-CF-Z samples were done using BET, FTIR, XRD, XRF and SEM –EDX methods. In batch experiments, maximum adsorption occured at pH 2, with a swift process and an optimal phase mixing time determined as 1 h for all of the samples. Analyzing experimental data using Langmuir and Freundlich adsorption models revealed coefficients of determination R2 exceeding 90%. The Freundlich isotherm was found to be more suitable for describing the adsorption process. (So...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 27, 2024 Category: Nuclear Medicine Source Type: research

Random and site-specific radiolabeling of [89Zr]Zr-DFO-anti-PD-L1-mAb iPET tracer
In this study, random and site-specific radiolabeling of89Zr-iPET tracers were investigated. Traditional lysine-based conjugation and enzyme-based GlyCLICK® kit method were used to prepare DFO-anti-PD-L1-mAb conjugates with a chelator-to-antibody ratio (CAR) of 0 –7 and 2.0, respectively. Then, conjugates with different CAR levels were radiolabeled with89Zr to obtain randomly or site-specifically radiolabeled89Zr-iPET tracer. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - February 27, 2024 Category: Nuclear Medicine Source Type: research

Characterization of fossils from the museum of natural sciences of Guarapuava by gamma-ray spectrometry
This article presents the Gamma-Ray Spectrometry (GRS) measurements of 32 fossil samples from the Museum of Natural Sciences of Guarapuava-PR, Brazil. GRS, without strict control of the measurement geometry, can serve as a complementary technique that gives results related to the total chemical and mineralogical composition of the pieces. In the case of fossils, GRS data may be interpreted to provide information about some diagenesis processes (mineralization) and the redox conditions of the sedimentary environment in which they were formed. The results demonstrated the feasibility of characterizing fossil samples with irr...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 26, 2024 Category: Nuclear Medicine Source Type: research

Effect of 226Ra purity as a target for 225Ac production using a fast reactor
AbstractResearchers are seeking alternative225Ac production methods because of the scarcity of225Ac for targeted alpha therapy. Although226Ra from waste sources has been considered, obtaining226Ra is challenging. Therefore, the authors focused on the contamination of minerals with232Th-derived228Ra while investigating methods to recover226Ra from uranium ores. The effect of228Ra contamination on225Ac production by226Ra transmutation using fast reactors was evaluated. Consequently, toxic228Ac contaminates225Ac. However, using the different half-lives of225Ac and228Ac, pure225Ac can be obtained from the chemical separation o...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 24, 2024 Category: Nuclear Medicine Source Type: research

Study on the mechanism of removing surface uranium pollution by polyvinyl alcohol foam gel/MOF-808 composite
AbstractA new polyvinyl alcohol foam gel/MOF-808 detergent was used to study the uranium removal process on the cement surface, and the mechanism was deeply analyzed. Through the mutual verification of XPS, infrared spectrum, XRD and SEM, it is confirmed for the first time that MOF-808 mainly relies on its own Zr-OH and carboxyl groups to remove uranyl ions in foam gel, rather than the carboxyl groups on the ligand. Foam gel combined with MOF-808 can improve the decontamination factor of cement surface by 37.3%, and the maximum removal rate of uranium pollution on cement surface can reach 68.1%. (Source: Journal of Radioan...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 24, 2024 Category: Nuclear Medicine Source Type: research

Removal of rare earth elements and thorium from LiCl –KCl molten salt by phosphate precipitation method
AbstractThe removal of rare earth fission products and thorium from LiCl –KCl system is of great significance to purification and recovery LiCl–KCl during pyroprocessing flow. The removal efficiency of rare earth elements or thorium was investigated by adding precipitant Li3PO4 in LiCl –KCl molten salt. The characteristics of precipitation products were determined by XRD, SEM, and EDS analysis and the removal ratios of rare earth elements were compared under different conditions. The removal ratio of Th and rare earth elements (except Eu) can reach 95% when adding a slightly exc ess of Li3PO4 at 823  K. About 50% Li...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 24, 2024 Category: Nuclear Medicine Source Type: research

Microwave-assisted synthesis and 99mTc-radiolabeling of anti-inflammatory active curcumin derivatives for inflammation diagnosis and therapy
AbstractUsing a one-pot cyclo-condensation process under microwave irradiation, derivatives of curcumin have been created. Evaluation their anti-inflammatory efficacy showed that they had stronger properties than curcumin. Additionally, the most active derivative was radiolabeled with the diagnostic radioisotope technetium-99m and prepared with a high radiochemical yield (96.5  ± 0.09%) and in vitro stability of up to 6 h. The in-vivo study in inflamed mice showed that [99mTc]Tc-curcumin derivative accumulated with a high target to non-target ratio. The gathered information confirmed the efficacy of the [99mTc]Tc-cur...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 24, 2024 Category: Nuclear Medicine Source Type: research

Densification study of sodium zirconium phosphate-type ceramic for immobilizing radionuclides of Sr prepared with microwave sintering from uranium tailing sand
In this study, a novel SrZr4(PO4)6 ceramic was synthesized using microwave sintering of uranium tailings. This method features shorter sintering times and efficient energy use. Sr replaces Na in sodium zirconium phosphate (NaZr2(PO4)3) due to similar ionic radii, transforming it into SrZr4(PO4)6 ceramics. The results showed that the sintered samples prepared by holding at 1200  °C for 50 min, which the density of the solidified body reached up to 3.2 g/cm3.The ceramics showcase outstanding leach resistance, with Sr leaching rates far below the nuclear industry standard (1  × 10−2 g m−2 d−1). Similarly, th...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 24, 2024 Category: Nuclear Medicine Source Type: research

Sorption behavior of fission products (Tc, I) in marine and freshwater bottom sediments
AbstractThe study investigated the sorption behaviour of99Tc and125I on bottom sediments from the Japan Sea, Khanka Lake and commercially available sapropel. It was determined that organic matter can have an impact on the iodine sorption process. After a 20-day period, sapropel reached an equilibrium state with a sorption value of up to 100%. In real systems of bottom sediment –water in the Far East region, iodine sorption was found to be superior on marine bottom sediments with a sorption value reaching 85% within 20 days, as opposed to freshwater sediments which only reached up to 35% within the same period. Tc(VII) i...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 24, 2024 Category: Nuclear Medicine Source Type: research

Preliminary investigation of radon-222 flux density in the soil surface: a case study of campus, China
AbstractRadon-222 (222Rn) is a global indoor health issue. A total of 74 points were measured in the woodland and grassland with the RAD7 device on the Hongxiang Campus of the University of South China. The results showed that the222Rn flux (RF) was 39.0 ± 30.3 mBq m−2 s−1 and 39.7 ± 29.3 mBq m−2 s−1 in the woodland and grassland, respectively. The value of RF map was lower than 50 mBq m−2 s−1 in most campus areas. The results serve as essential reference data for future222Rn risk-health assessment and management strategies on the campus. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - February 24, 2024 Category: Nuclear Medicine Source Type: research

A study on the relationship between the radiation detection quantity of NORM-containing products in Taiwan
This article compiles test results of 105 NORM-containing products categorized into bedding, clothing, and accessories for analysis using correlation coefficient from 2019 to 2022. Relationships between measurement quantities, external doses, internal doses and specific activities are investigated. Internal dose is predominantly related to the radon activity concentration for bedding products, with correlation coefficients exceeding 0.8. The coefficients decreases to 0.7 and 0.6 for clothing and accessory products, respectively. Regarding products exceed the regulatory limits, it is challenging to discern correlations betw...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 24, 2024 Category: Nuclear Medicine Source Type: research

Insight into adsorption behavior of activated ZrO2 prepared by solution combustion for the removal of chromium and barium ions from aqueous solutions
AbstractThe prepared activated zirconium oxide was characterized using different analytic techniques and investigated as a new inorganic sorbent to get rid of the chromium and barium ions from the waste stream. Several experiments have been performed, including the impact of contact time, pH, initial ion concentration, temperature, desorption, and the effect of interfering ions. Different isotherm kinetic models were investigated. The outcomes demonstrated that, the second-order kinetic model was appropriate, and the monolayer capacities for the chromium and barium ions were 35.9 and 33.9  mg/g, respectively. Finally, zir...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 24, 2024 Category: Nuclear Medicine Source Type: research