The neutron flux distribution within the pool of the SLOWPOKE-2 reactor at the RMC has been characterized using neutron activation measurements as well as MCNP simulations. Westcott equivalent thermal neutron flux values were calculated from measured activities of solutions of Co, Au, and Cd-shielded Au at several reactor flux settings and compared to tabulated fluxes from MCNP simulations. Good agreement was found between the simulated and experimental thermal flux values, while larger uncertainties were highlighted in higher energy neutron fluxes.
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http://dx.doi.org/10.1016/j.apradiso.2024.111262 | DOI Listing |
ACS Environ Au
January 2025
Dow Centre for Sustainable Engineering Innovation, School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia.
The global transition to clean energy technologies has escalated the demand for lithium (Li), a critical component in rechargeable Li-ion batteries, highlighting the urgent need for efficient and sustainable Li extraction methods. Nanofiltration (NF)-based separations have emerged as a promising solution, offering selective separation capabilities that could advance resource extraction and recovery. However, an NF-based lithium extraction process differs significantly from conventional water treatment, necessitating a paradigm shift in membrane materials design, performance evaluation metrics, and process optimization.
View Article and Find Full Text PDFSci Total Environ
January 2025
Key Laboratory of Geographic Information Science (Ministry of Education), School of Geographic Sciences, Shanghai, China; Hainan Institute of East China Normal University, China.
Hainan Island, the largest tropical island in China, is a notable source of pollutants, with a significant proportion of terrigenous contaminants discharged into the ocean. Platinum group elements (PGEs) pose potential risks to both the environment and human health, but research on this topic remains limited. In this study, we analyzed water from Hainan Island offshore area to investigate distribution characteristics of PGEs and its trend into the sea.
View Article and Find Full Text PDFNat Commun
January 2025
Department of Biochemistry, University of Zurich, Zurich, Switzerland.
Iron and manganese are essential nutrients whose transport across membranes is catalyzed by members of the SLC11 family. In humans, this protein family contains two paralogs, the ubiquitously expressed DMT1, which is involved in the uptake and distribution of Fe and Mn, and NRAMP1, which participates in the resistance against infections and nutrient recycling. Despite previous studies contributing to our mechanistic understanding of the family, the structures of human SLC11 proteins and their relationship to functional properties have remained elusive.
View Article and Find Full Text PDFMar Pollut Bull
January 2025
State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China.
Investigations of the spatial-temporal variations of nutrients within mangrove coastal zones are essential for assessing the environmental status of an aquatic ecosystems. However, major processes controlling nitrate cycle along the submarine groundwater discharge (SGD) pathway from the mangrove areas to adjacent tidal creek remain underexplored. A time series measurement over a 25 h tidal cycle was conducted in Qinglan Bay tidal creek (Hainan Island, China).
View Article and Find Full Text PDFSci Total Environ
January 2025
Université Paris Cité - Institut de Physique du globe de Paris, CNRS, F75005 Paris, France.
Nanoparticles (NPs) exhibit high reactivity and mobility in the environment, and a significant capacity to penetrate living organisms, potentially leading to harmful effects. Volcanoes are the second major source of natural NPs emitted into the atmosphere, with an estimated flux of 342 Tg/year. Few studies have focused on their fate.
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