Why improve, update, and harmonize databases of Kd values in soils, freshwater, and marine environments?: the case of cesium Kd values from soils and rivers

Boyer, P.; Vidal, M.; Ramírez-Guinart, O.; Wells, C.; Kaplan, D.; Howard, B.. 2017 Why improve, update, and harmonize databases of Kd values in soils, freshwater, and marine environments?: the case of cesium Kd values from soils and rivers. [Lecture] In: 4th International Conference on Radioecology & Environmental Radioactivity (ICRER), Berlin, Germany, 3-8 Sept 2017. (Unpublished)

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Abstract/Summary

The solid-liquid fractionation of radionuclides is one of the key processes when assessing radionuclides transfers in the environment. This fractionation impacts the bioavailability of radionuclides and several transfer pathways in soils, freshwater and marine environments. It depends on complex interactions specific to radionuclides, properties of solid particles (size, nature, origin,…) and geochemical and environmental conditions (pH, temperature, conductivity,…). Mechanistic approaches to modelling are typically very complex and, despite strong limitations due to assumptions of instantaneous and reversible equilibrium, the Kd approach remains the most common because of the wide availability and the ease of its measuring. However, selection of Kd values can be difficult, especially when site specific information is not available. Experts often apply screening values and statistical distributions reported in the literature (IAEA, 2010). This context motivated a part of the work of the Working Group 4 of the IAEA MODARIA program to update and complete compilations of Kd in soils and freshwater environments. For the next MODARIA II program this group intends to homogenize the Kd’s compilations with the same uniform database structure and make soil, freshwater and marine Kd datasets consistent. The new structure will facilitate comparisons and analyzes between radionuclides and environmental compartments.

Item Type:	Publication - Conference Item (Lecture)
UKCEH and CEH Sections/Science Areas:	Shore UKCEH Fellows
Additional Keywords:	radioecology
NORA Subject Terms:	Ecology and Environment
Date made live:	26 Sep 2017 10:31 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/517835

Item Type:

Publication - Conference Item (Lecture)

UKCEH and CEH Sections/Science Areas:

Shore
UKCEH Fellows

Additional Keywords:

radioecology

NORA Subject Terms:

Ecology and Environment

Date made live:

26 Sep 2017 10:31 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/517835