A study on determination of potentially hazardous plutonium isotopes in environmental samples.

J Environ Sci Health C Environ Carcinog Ecotoxicol Rev

University of Gdańsk, Faculty of Chemistry, Sobieskiego, Gdańsk, Poland.

Published: November 2013

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This study investigated the potential association between uranium exposure and mortality from cerebrovascular diseases, with a focus on the mediating effects of lipid indicators. Employing recommended sampling weights to account for National Health and Nutrition Examination Survey' complex survey design, this analysis drew from data collected between 2005 and 2016. The study examined the impact of uranium on mortality from cerebrovascular diseases using various statistical approaches, including Cox regression to assess linear relationships within metal mixtures.

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Cryoconite is abundant in artificial radionuclides such as plutonium (Pu) and amounts of radioactive contaminants is stored in glaciers. Under global warming and glaciers rapid retreating, glaciers could be a second source for radioactive contaminants and the stored Pu isotopes could be released to the downstream areas through surface runoff. However, the knowledge and understanding on the migration behavior and cycling of Pu isotopes in the ice cap is quite limited.

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Provenance and sedimentation of Pu and Np in the northern Taiwan Strait suffering intensive land-ocean interaction.

Environ Pollut

November 2024

The Key Laboratory of Coastal and Island Development of Ministry of Education, School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China.

Article Synopsis
  • The China Sea faces increased risk of contamination from human-made radionuclides, particularly plutonium (Pu) and neptunium (Np), making it essential to study their origins and movement for safety assessments.
  • This study uses cutting-edge SF-ICP-MS technology to measure Pu and Np levels in sediment cores from the northern Taiwan Strait and East China Sea, confirming their utility as tools for dating geological events.
  • Findings show global fallout and nearby nuclear tests as primary sources of these isotopes, with distinctive behaviors affecting their sediment distribution and environmental mobility, highlighting different preservation in sediments versus water.
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Biogeochemistry of Actinides: Recent Progress and Perspective.

ACS Environ Au

November 2024

Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States.

Actinides are elements that are often feared because of their radioactive nature and potentially devastating consequences to humans and the environment if not managed properly. As such, their chemical interactions with the biosphere and geochemical environment, i.e.

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Cryoconite, granule-shaped debris found on the surface of glaciers, is known for trapping substantial quantities of pollutants such as radioactive nuclides and heavy metals. This study investigates contamination levels, sources and spatial variability of natural and artificial radioisotopes in cryoconite from Mittivakkat Gletsjer in southeast Greenland by determining the activity and atomic ratios of selected radionuclides. The maximum activity concentrations of artificial radioisotopes were 1129 ± 34 Bq kg for Cs, 3.

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