Monitoring of caesium-137 in surface seawater and seafood in both the Irish and North Seas: trends and observations

Leonard, K.S.; Donaszi-Ivanov, Andras; Dewar, Alastair; Ly, V. E.; Bailey, Trevor

doi:10.1007/s10967-016-5071-3

Cited by 3 publications

(1 citation statement)

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“…Consequently, monitoring programs and research studies have been giving priority for Cs-137 activity concentrations, trends, and concentration factors in contaminated areas. For example, Cs-137 analysis and accumulation monitoring in edible fishes and marine wildlife have been given great attention in Japan, 6 the European Union, 7 , 8 and U.K. 9 Regulators and stakeholders make use of concentration factors and the derived concentration guideline levels for calculations of regulated discharges. Therefore, Cs-137 monitoring in seawater is important for decision-making and for supporting disposal programs.…”

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confidence: 99%

Development of a Novel DGT Passive Sampler for Measuring Cs-137 In Situ in Marine Environments

Elsenbawy,

Pates,

Kamel

et al. 2024

Anal. Chem.

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Cs-137 is the most released fission product in the marine environment. It is important to develop a robust in situ technique for its monitoring. The existing diffusive gradients in thin films (DGT) passive sampling techniques for in situ measurement of Cs + have some limitations due to the ion competition and high pH of seawater. A new DGT sampler based on potassium zinc hexacyanoferrate (KZFCN) as a binding layer has been developed and investigated for the measurement of the timeweighted average concentration of Cs-137 in seawater. This binding layer proved a working pH range of 2−12 and an ionic strength of up to 0.75 M. Two types of diffusive gels were tested and agarose gel (AGE) was chosen for the KZFCN-DGT sampler. The measured Cs + diffusion coefficient (1.71 × 10 −5 cm 2 •s −1 at 25 °C) in the diffusive gel from seawater was within the expected range published in the literature. The measured concentrations of Cs-137 in seawater obtained by laboratory deployments of the KZFCN-DGT samplers for up to 4 weeks showed good precision (RSD = 13%) and accuracy (relative error = 8.5%) values. The performance test results demonstrated that the KZFCN-DGT sampler is suitable for long-term monitoring of Cs-137 in seawater due to its high capacity and resistance to ion competition and high pH.

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confidence: 99%