1. Direct method for Ra-226 analysis in water samples using ICP-QQQMSIvana Coha, Marko Štrok, Norbert Kávási, 2026, izvirni znanstveni članek Povzetek: The paper describes a method of determination of Ra-226 in natural water using ICP-QQQ-MS, Agilent 8900, that enables an efficient direct determination of Ra-226 with high sensitivity without using any reaction gas and separation procedures for interference removal. The matrix effect, together with the instability of the sensitivity are controlled by spiking the sample with Ra-226. The method is simple and fast with a detection limit around of 0.1 fg g-1 (3.6 mBq kg-1), which is tenfold lower than required by the EU Directive for water consumption (40 mBq kg-1) and five times better than results obtained from alternative direct method for routine analysis described in the literature. The method can easily be implemented for routine analysis Ra-226 which was demonstrated by direct determination of Ra-226 in IAEA proficiency test water sample. This is the first time that the accuracy (trueness and precision) of a mass spectrometry method for the direct determination of Ra-226 has been tested and confirmed in an independent proficiency test.
Ključne besede: standard addition
Objavljeno v DiRROS: 30.01.2026; Ogledov: 204; Prenosov: 93
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2. Recent advancements in the development of Two-Dimensional nanostructured based anode materials for stable power density in microbial fuel cellsRaghuraj S. Chouhan, Sonu Gandhi, Suresh Kr. Verma, Ivan Jerman, Syed Baker, Marko Štrok, 2023, pregledni znanstveni članek Povzetek: The demand for alternative energy sources from non-recyclable waste materials will be a hot research topic in future industries. This interest is primarily due to the ability to harness energy from waste materials, the provision of localized power solutions, and the promotion of efficient power conversation. In this respect, Microbial Fuel Cells (MFC) represent new energy sources possessing unique qualities for many applications. MFC generates power by utilising exoelectrogens forming the biofilm on the surface of the anode. Since in the MFC, wastewater is primarily converted into protons and electrons at the anode surface, where biofilms typically develop, the anode becomes the most vital component. Consequently, significant research has been conducted on anode material to improve MFC performance. The present review focuses on different aspects of the MFC, including a comprehensive summary of the recent developments in the field of MFCs, including a state-of-the-art literature review based on a bibliometric analysis using keywords, a description of the mechanism and operational principle of MFC, applications and a summary of current research perspectives including the use of carbon nanotubes, graphene, graphitic carbon nitride, MXene, and their nanocomposites as anode materials with stable power density performance. Lastly, we present the challenges and future perspectives regarding the continued development of MFC anode materials, culminating in overall conclusions related to MFC research.
Ključne besede: microbial fuel cells, 2D nanomaterial, power density, nanocomposite, Anode
Objavljeno v DiRROS: 16.12.2025; Ogledov: 220; Prenosov: 139
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3. ICARUS : development, optimization, and harmonization of innovative characterization techniques for large volumes of radioactive wasteBas Janssen, José Luis Leganés Nieto, Yevheniia Kudriashova, Lixin Qiao, Ferdinando Giordano, An Bielen, Marko Štrok, Anumaija Leskinen, Arturas Plukis, Eros Mossini, 2025, izvirni znanstveni članek Povzetek: In the framework of the EURAD-2 partnership, the ICARUS (Innovative ChARacterization techniques for large volUmeS) work package aims at further developing, optimizing and harmonizing innovative techniques for the radiological, physical and chemical characterization of large volume of low/intermediate-level mixed waste, as it could be critical for the safe implementation of radioactive waste management programmes of the member states. Destructive Techniques (DT), Non-Destructive Techniques (NDT), and Scaling Factors (SF) will be investigated. Four use cases will be considered according to the end users’ needs: (i) enabling fast and sufficiently accurate characterization of gamma activity distribution by NDT in complex large packages, including mixed wastes as heterogeneous legacy waste; (ii) improving and simplifying NDT for determining physico-chemical properties; (iii) improving sensitivity, accuracy, and uncertainty and replacing the expensive and time-consuming radiochemical analysis of long-lived Difficult To Measure (DTM) radionuclides by DT; (iv) improving accuracy, uncertainty, and reliability of the SF approach to estimate DTM radionuclides in raw mixed waste. Specific education and training materials and opportunities will be provided to foster career advancement of young professionals and researchers. The research activities will be carried out by 29 organizations from 17 countries.
Ključne besede: nuclear physics, nuclear waste, nuclear fuel, nuclear decay
Objavljeno v DiRROS: 30.10.2025; Ogledov: 269; Prenosov: 144
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4. A half-century of nuclear research, education and training : Story of the JSI TRIGA reactorLuka Snoj, Klemen Ambrožič, L. Barbot, Ljudmila Benedik, Arne Bratkič, Ivana Capan, C. Reynard-Carette, Vladimir Cindro, Dušan Čalič, Christophe Destouches, B. Geslot, Alireza Haghighat, Romain Henry, Milena Horvat, Elchin Huseynov, Gregoire De Izzara, Radojko Jaćimović, Anže Jazbec, Igor Jenčič, Robert Jeraj, Malcolm Joyce, Domen Kotnik, Gregor Kramberger, Igor Lengar, Jan Malec, Igor Mandić, Valerio Mascolino, Vid Merljak, Marko Mikuž, Gilles Noguere, Julijan Peric, Anže Pungerčič, Vladimir Radulović, Sebastjan Rupnik, Borut Smodiš, Zdenka Šlejkovec, Marko Štrok, Žiga Štancar, Ingrid Švajger, N. Thiollay, Iztok Tiselj, Andrej Trkov, Bojan Žefran, Gašper Žerovnik, Ylenia Žiber, Tanja Goričanec, 2025, pregledni znanstveni članek Povzetek: The TRIGA Mark II research reactor at the Jožef Stefan Institute is a key facility in the field of nuclear research, characterized by its versatility and applicability in a wide range of scientific disciplines. This document highlights its operational history, contributions to nuclear safety, education and various scientific applications, including advances in reactor and radiation physics, neutron activation analysis, environmental science and even contributions to the fight against the COVID-19 pandemic. It highlights the reactor’s significant role in fostering international collaborations, improving computer modeling techniques for nuclear research, and providing invaluable educational experiences. The great versatility and applicability of the JSI TRIGA reactor is emphasized by its adaptability to various research needs and its ability to enable groundbreaking studies in both fundamental and applied sciences
Objavljeno v DiRROS: 11.04.2025; Ogledov: 901; Prenosov: 233
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5. Impact assessment of the Gajke and Brstje landfills on groundwater status using stable and radioactive isotopesSonja Cerar, Luka Serianz, Polona Vreča, Marko Štrok, Tjaša Kanduč, 2023, izvirni znanstveni članek Povzetek: Waste disposal in landfills represents a severe threat to aquatic environments on the local, regional, and global levels. In Slovenia, there are 69 registered landfills where groundwater is regularly monitored. However, isotope techniques are not regularly employed. Therefore, we employed isotope analysis of hydrogen, carbon, and oxygen in combination with total alkalinity to assess the impact of the selected landfill on groundwater and to evaluate the biogeochemical processes at work. The δ18O, δ2H, δ13CDIC, 3H activity and total alkalinity were determined in October 2020 at 12 sampling points from the surrounding area of the Gajke and Brstje landfills and leachate from the Gajke landfill. The δ18O (-9.24 ± 0.3 ‰) and δ2H (-64.9 ± 2.7 ‰) in groundwater indicate that the main water source consists in direct infiltration of precipitation, with no significant isotopic fractionation. Total alkalinity in the investigated area ranges from 5.45 to 73 mM and δ13CDIC from –14.9 to +6.1 ‰, respectively. Higher values of total alkalinity (up to 73 mM), δ13CDIC (up to +6.1 ‰), δ18O (-7.64 ‰) and 3H (209.8 TU) are detected in the leachate, indicating biogeochemical process related to CO2 reduction or methanogenesis. Methanogenesis could be present at locations GAP-10/13 (Brstje landfill) and G-2 (Gajke landfill) with δ13CDIC values ranging from –8.2 to –7.6 ‰ and with dissolved oxygen values around 0 % and elevated 3H values (from 16 to 18 TU). This study demonstrates the effectiveness of isotopic analysis as a valuable tool for monitoring landfills, revealing shifts in biogeochemical processes within the groundwater there.
Ključne besede: groundwater, monitoring, landfill, stable isotopes, tritium, Gajke, Brstje
Objavljeno v DiRROS: 16.01.2024; Ogledov: 1400; Prenosov: 459
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