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Disequilibrium in natural decay series in samples from Czech water treatment plants: Uranium, radium and thorium isotopes determination.
J Environ Radioact
January 2025
National Radiation Protection Institute (SURO), Bartoškova 28, 140 00, Prague, Czech Republic.
In the Czech Republic, underground or mixed source water treatment plants are classified as the workplaces with possible increased exposure from a natural source of radiation. When releasing waste materials or residues from these NORM workplaces into the environment, the content of natural radionuclides is measured and compared with the clearance levels established by Czech legislation. The content of natural radionuclides in solid samples is determined primarily by high-resolution gamma-ray spectrometry.
View Article and Find Full Text PDFEvaluation of radiological hazards associated with some Egyptian marble and granite rocks.
Sci Rep
November 2024
Physics Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt.
Article Synopsis
- The study investigates the radioactivity and radiological risk of various granites and marbles from Egypt, using a Germanium detector to measure activity levels.
- It found that granite samples had significantly higher levels of radioactivity compared to marble samples, with average activity concentrations for granite exceeding global soil averages.
- The presence of potassium feldspar in granites is attributed to the increased radioactivity, while marbles are considered safer due to their lower potassium and uranium/thorium content.
Soil-to-plant transfer factors of uranium and thorium in mining and non-mining districts of Ghana.
J Environ Radioact
December 2024
Department of Chemistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
The activity concentrations of natural radionuclides in water, soil, cassava, cocoyam and yam grown in two mining districts and a non-mining district in Ghana were determined using a high-resolution gamma spectroscopy system with high-purity germanium detector. The estimated absorbed dose for soil from Amansie, Konongo, and Mampong were 206 nGy/h, 224 nGy/h and 198 nGy/h, respectively, which were all above 60 nGy/h set by the United Nations Scientific Committee on the Effects of Atomic Radiation. The soil-to-plant transfer factors (TF) for ³⁸U, ³Th, and ⁴⁰K ranged from 0.
View Article and Find Full Text PDFAdvancing Rare-Earth (4) and Actinide (5) Separation through Machine Learning and Automated High-Throughput Experiments.
ACS Sustain Chem Eng
November 2024
Theoretical Division, Los Alamos National Lab, Los Alamos, New Mexico 87545, United States.
Article Synopsis
- Researchers are focusing on improving separation techniques in chemistry to find more sustainable alternatives to traditional methods, like liquid-liquid extraction, which are important for both basic and applied chemistry.! -
- The challenge lies in exploring a wide array of experimental conditions to optimize these separation procedures, but advancements in AI and robotics can help streamline this process.! -
- By applying Bayesian Optimization and robotic experiments, the study demonstrated a 74% reduction in experimental efforts needed to identify optimal conditions for liquid-liquid extraction of thorium, leading to significant time and cost savings as well as reduced human exposure to radioactive materials.!
Exploring geothermal energy prospects through radioelement enrichment zones in Gabal Abu Hashim area in southeastern Aswan by geophysical and remote sensing data integration.
Sci Rep
November 2024
Exploration Division, Nuclear Materials Authority, Cairo, Egypt.
Alteration zones in the Eastern Desert are promising for minerals and geological resources exploration. Remote sensing and geophysical techniques offer cost-effective tools for identifying new exploration sites. Additionally, their use in mapping potential alteration zones is crucial for enhancing exploration.
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