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.

Highly efficient removal of uranium (VI) from aqueous solutions by amino functionalized bentonite
In this study, amino functionalized bentonite (Bent-NH2) was prepared by modifing Gaomiaozi bentonite with 3-Aminopropyltriethoxysilane. Various characterization results confirmed the successful grafting. The batch adsorption experiments indicated Bent-NH2 reached its maximum adsorption capacity rapidly (20  min), 49.168 mg/g. Notably, Bent-NH2 had better adsorption performance than unmodified bentonite in really groundwater with different pH. This work demonstrates that Bent-NH2 has excellent adsorption performance and can be used for low uranium wastewater treatment and geological disposal. (Source: Journal of Radioana...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 30, 2024 Category: Nuclear Medicine Source Type: research

Biogenic harmony of biocompatible silver nanoplatforms using chamomile extract and apigenin-7-glucoside for solid tumor therapy
In conclusion, after further preclinical studies, both chamomile silver nanoparticles (Ch-AgNPs) and apigenin-7-glucoside silver nanoparticles (Ap-AgNPs) can be used as potential drugs for tumor theranostics. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - January 29, 2024 Category: Nuclear Medicine Source Type: research

Sensitive fluorescent determination of uranyl ions using a terbium (III) 4-sulfocalix[4]arene probe
AbstractUranium, regarded as an important element in nuclear fission energy schemes, is harmful to public health owing to its high toxicity and radioactivity. Herein, a novel fluorescent probe (SC4A@Tb3+) was developed using a one-step liquid-phase method with 4-sulfocalix[4]arene (SC4A) and rare earth –metal ions (Tb3+) as precursors to realize the accurate monitoring of uranyl ion (UO22+) detection. Based on the dynamic quenching mechanism, the SC4A@Tb3+ fluorescence quenching sensor for UO22+ detection was in the linear range of 0 –0.36 µM, with a detection limit of 20 µg·L−1, and successfully quantified UO22+...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 29, 2024 Category: Nuclear Medicine Source Type: research

Immobilization of simulated 137Cs in waste soda-lime glass modified by Ca, Ba, and B2O3
AbstractR2+ (R = Ca, Ba) and B2O3-modified waste soda-lime glass ’s immobilization of Cs is investigated using product consistency tests. The introduction of Ca2+ and Ba2+ to waste glass can inhibit the diffusion motion of Cs+ in glass network, and thus reducing the leaching concentration of Cs+. The excessive addition of Ca2+ to waste glass produced the crystallization of CaSiO3 and Ca(Si2O7)B2O phases and worsened the ability to immobilize Cs. When B2O3 exists as [BO4] units in glass, the normalized leaching concentration of Cs+ is decreased, the existence of [BO3] units in glass can diminish its ability to immobil...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 29, 2024 Category: Nuclear Medicine Source Type: research

Mass spectrometry developments of 232Th and 238U radiopurity measurements for LEGEND
AbstractThe LEGEND collaboration has been developing a76Ge-based double-beta decay experimental program where precise radiopurity measurements of ultraclean materials are crucial. Ultralow concentrations of thorium and uranium, the main contributors to the detector background via their decay products, can be determined by inductively coupled plasma mass spectrometry (ICPMS) and accelerator mass spectrometry (AMS). Here we shall present recent developments in thorium and uranium mass spectrometry methods, together with basics of separation chemistry applied to process different samples. The new possibilities to measure232Th...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 29, 2024 Category: Nuclear Medicine Source Type: research

Highly efficient capture of thorium ion by graphene oxide modified UiO-66-NH2 from aqueous solution
AbstractThe efficient removal of thorium from the environment is critical due to the risks it poses to organisms. Metal –organic frameworks are favored by scholars because of their potential to effectively adsorb a variety of heavy metal ions in wastewater treatment. In this work, the interaction of UiO-66-NH2 surface with graphene, enhances adsorption capacity of MOFs. Optimal adsorption conditions have been identified, and a detailed adsorption mechanism has also been comprehensively discussed. The theoretical maximum adsorption capacity exhibited by UiO-66-GO is 119.57  mg g−1. Moreover, it shows a fast adsorption...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 25, 2024 Category: Nuclear Medicine Source Type: research

Phosphate-functionalized mesoporous carbon for efficient extraction of uranium (VI)
This study introduces an easy procedure to synthesize phosphate-rich biochar (PS) from sawdust by treating it with phosphoric acid before carbonization (700  °C). The sample was characterized by SEM, FT-IR, BET and XPS, indicating that the PS700 exhibited a high concentration of phosphorous groups, high specific surface area and developed mesoporous structure. Subsequently, the effects of pH (optimal at pH 7), adsorption kinetics (fitted by quasi-seco nd-order), and sorption isotherms (modeled by Langmuir) were investigated. The best uranium (VI) adsorption performance of PS700 is 808 mg g−1 at 40  °C and pH 7. In ...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 25, 2024 Category: Nuclear Medicine Source Type: research

Experimental study of long-term catalytic effect on hydrogen generation G value of water by gamma-ray irradiation and hydrogen diffusion analysis in Compacted Hulls and End-Piece waste
In this study, it was evaluated the long-term catalytic effect and catalyst poisoning effect  of gamma-ray irradiation on zirconium molybdate hydrate in the presence of three-way catalysts. The results indicated that the three-way catalyst was effective in suppressing the increase in hydrogen concentration due to radiolysis without being affected by poisoning. In addition, hydrogen diffus ion analysis of the compressed hull and endpiece waste shows that hydrogen flows well through the waste and is suppressed by a three-way catalyst located in the center of the waste headspace. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - January 24, 2024 Category: Nuclear Medicine Source Type: research

Determination of concentration of formaldehyde in high level waste during the destruction of nitric acid in PUREX process
AbstractA simple titrimetric procedure has been developed for the determination of the concentration of formaldehyde present in nitric acid. The procedure is based on well-known condensation reaction between carbonyl compounds and hydrazine. This method has been validated for the determination of concentration of formaldehyde in samples obtained from evaporator during the decomposition of nitric acid in high level waste generated in PUREX process. Interference studies were performed in presence of commonly available contaminants such as uranium, dissolved TBP, fission products such as Zr, Ru in predicted concentration rang...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 23, 2024 Category: Nuclear Medicine Source Type: research

Quantification of 222Rn exhalation rates and effective 226Ra content from geological samples across the Kopili Fault Zone, India
AbstractThe study presents measurements of222Rn exhalation rates,226Ra contents and radiological exposure doses of granite, gneiss, shale, sandstone and soil samples across the seismically active Kopili Fault Zone, India using LR-115 (II) track detectors. The granites were found to have higher222Rn exhalation rates than the other types of rocks. The study shows higher222Rn exhalation rates and radiological exposure doses of soil samples collected near the fault than those collected away from the fault. However, the226Ra contents in every geological sample were within the global average value of 40  Bq kg−1 for material...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 23, 2024 Category: Nuclear Medicine Source Type: research

An assessment of natural and artifical radionuclide content in powdered milk consumed by infants and toddlers in Singapore
AbstractHigh-resolution gamma spectrometry was employed to evaluate radioactivity levels in powdered milk sold in Singapore. The mean activity concentrations of228Ra,226Ra,40K and137Cs in infants ’ powdered milk were determined to be 0.442 Bq/kg, 0.251 Bq/kg, 197 Bq/kg and 0.080 Bq/kg respectively, while activity levels in powdered milk consumed by toddlers were 0.494 Bq/kg for228Ra, 0.216  Bq/kg for226Ra, 263  Bq/kg for40K and 0.119  Bq/kg for137Cs. Annual total effective doses and radiological risk were also estimated for both age groups. The results indicated that consumption of powdered milk poses insignifica...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 23, 2024 Category: Nuclear Medicine Source Type: research

Mosses as bioindicators of air pollution with potentially toxic elements in area with different level of anthropogenic load in Karaganda region, Kazakhstan
AbstractFor the first time, moss biomonitoring was carried in Karaganda region, Kazakhstan. The studied area covered two territories with different level of anthropogenic load: the Karkaraly National Park and the Akzharyk settlement. The level of 36 major, minor and trace elements was determined in mosses collected at studies areas using neutron activation analysis and three elements, Cu, Cd and Pd were detected applying atomic absorption spectrometry. To reveal any associations of elements and to match them with possible emission sources factor analysis was applied. The contamination factor, pollution load index, and envi...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 22, 2024 Category: Nuclear Medicine Source Type: research

Study on the prevention and control of uranium pollution by Deinococcus radiodurans overexpressing Cs gene
Conclusions: The recombinant strainDeino-Cs can reduce the inhibitory effect of aluminum ions on uranium accumulation capability, and it exhibits a higher uranium accumulation rate compared to the wild-type strain. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - January 19, 2024 Category: Nuclear Medicine Source Type: research

Synthesis and in vitro evaluation of 99mTc radiolabeled lapatinib (LPT) and its PLGA formulation
AbstractLapatinib-(LPT) is a dual tyrosine kinase inhibitor that has important effects on the targeted therapy of various tumours. The current study is aimed to use a novel tracer strategy including Technetium-99  m-(99mTc) radiolabeled LPT and its poly(lactic-co-glycolic acid)-(PLGA) encapsulated formulation-(LPT-PLGA). In vitro bioaffinity of the [99mTc]Tc-LPT and [99mTc]Tc-LPT-PLGA was evaluated by using cell culture methods on human breast adenocarcinoma (MDA-MB-231), cervix adenocarcinoma and human ovarian (MDAH-2774) cancer cell lines. Radiochemical yield were over 95% and both compounds were examined high incorpora...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 19, 2024 Category: Nuclear Medicine Source Type: research

Comparative analysis of adsorptive potential of TiO2 and its MWCNT composite (TiO2-MWCNT) as uranium (VI) scavengers
AbstractIn the current study, sol gel and hydrothermal methods were used to synthesis pure TiO2 (TO) and its composite with multiwalled carbon nanotubes (TO –C), respectively. The prepared materials were subjected to surface and structural characterization using XRD, RAMAN, FESEM and EDX. The batch mode experiments were carried out systematically to obtained the adsorption data which were further analysed using various isotherm, kinetic, and thermodyn amic models, in order to determine the adsorptive potential of TO and TO–C for the remediation of U(VI). The thermodynamic characteristics showed the endothermic and spon...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 19, 2024 Category: Nuclear Medicine Source Type: research