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Issue 10, 2018
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Focus on speciation assessment in marine radiochemistry using X-ray absorption spectroscopy

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Abstract

The solubility, migration behavior and bioavailability of radionuclides in the marine environment strongly depend on their speciation. This focus article reviews the state-of-the-art and recent advances in the determination of radionuclide speciation in seawater, which is still challenging because of the very high ionic strength of the medium associated with ultra-trace concentrations of these elements in the oceans. In particular, we have highlighted the contribution and usefulness of synchrotron-based techniques such as X-ray absorption spectroscopy. Within this scope, we overview some major radionuclides in seawater, their natural or anthropogenic origin, and their reactivity and natural concentrations. We outline the theoretical speciation models currently used, based on thermodynamic stability constants, and compare them to published experimental data recently obtained from spectroscopic investigation of radionuclides in natural seawater samples. Finally, we discuss some leading perspectives on radionuclide speciation using X-ray absorption spectroscopy in environmental samples at concentrations that must deal with spectroscopy detection limits.

Graphical abstract: Focus on speciation assessment in marine radiochemistry using X-ray absorption spectroscopy

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Publication details

The article was received on 08 Dec 2017, accepted on 21 Apr 2018 and first published on 23 Apr 2018


Article type: Perspective
DOI: 10.1039/C7NJ04862A
Citation: New J. Chem., 2018,42, 7582-7591
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    Focus on speciation assessment in marine radiochemistry using X-ray absorption spectroscopy

    M. R. Beccia, P. L. Solari, M. Monfort, C. Moulin and C. Den Auwer, New J. Chem., 2018, 42, 7582
    DOI: 10.1039/C7NJ04862A

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