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Simultaneous determination of Sr and Pu isotopes in marine biological samples.

Anal Chim Acta

November 2025

State Key Laboratory of Loess Science, Shaanxi Key Laboratory of AMS Technology and Application, Xi'an AMS Center, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China. Electronic address:

Pu and Sr are highly important radionuclides in the environment, which can accumulate in the human body through the food chain and cause radiation exposure. With the continuous discharge of treated nuclear contamination water from the Fukushima Daiichi nuclear power plant, it is crucial to investigate and monitor the levels of Pu and Sr in seafood. However, it is still a challenge to determine Pu and Sr in seafood at environmental levels, owing to their extremely low concentrations, labor-intensive and time-consuming pre-treatment for large-sized samples.

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Advancing environmental safety and public health: a comprehensive review of luminescent probes for radioactive element detection.

Analyst

September 2025

State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.

Recently, radioactive pollutants have garnered significant attention within the realms of environmental science and public safety, such as nuclear energy (, uranium), radiation therapy (, I), and earthquake monitoring (, radon), exerting multifaceted impacts on human health and ecosystems. Therefore, the development of accurate detection technologies for key radioactive elements is of paramount importance and is also an important guarantee for ensuring public safety and comprehensively promoting harmonious coexistence between humans and nature. Luminescent probes represent a class of detection methods for radioactive elements, characterized by high sensitivity, simplicity, and visualization.

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Radioisotope Thermoelectric Generators (RTGs) are devices that convert heat from radioactive decay into electrical energy and are used in remote locations due to their low maintenance requirements. Various types of RTGs were produced with sources containing large amounts of Strontium-90, which require multiple layers of shielding materials. However, the lack of control and the ease of access to the source increase the biological risk in the event of a breach of the device.

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Objective: This work aims to assess the impact of three nuclear power plants (NPPs) in Zhejiang Province on the levels of Sr in surrounding seafood, and to evaluate the associated health risks, providing a scientific basis for operational monitoring and contributing essential baseline data for nuclear emergency preparedness.

Methods: From 2021 to 2023, the specific activities of Sr in five types of seafood (fish, shrimp, mussels, crabs, and algae) were monitored in the three NPPs, compared with Zhoushan City, which has no NPP, and the annual effective dose (AED) was estimated.

Results: The results show that the mean specific activities of Sr in fish, shrimp, mussels, crabs, and algae around the NPPs were found to range from 0.

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Strontium (Sr) was selected as a non-radioactive surrogate for the high-risk radionuclide Sr due to their environmental and chemical similarities, enabling the safe evaluation of long-term immobilization strategies. This study investigates the potential of alkali-borosilicate glasses (ABS) synthesized from industrial waste glass grit as a sustainable and durable waste form for Sr immobilization. The structural integrity and degradation behavior of Sr-loaded ABS glass samples were examined under short-term leaching and harsh conditions.

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