Description
Sorption is a general term encompassing processes in which one substance (e.g. part of the EBS) takes up or holds a dissolved species (e.g. radionuclide) by physico-chemical interactions, thereby retarding its transport. For example, radionuclides can sorb on the surfaces of open channels within water-conducting features and also on the surfaces of pores accessible by matrix diffusion
Category
Category of FEP
Sub-category
Sub-category of FEP
Ondraf Niras FEP Number
Ondraf Niras FEP Number
FEP Effects
Description of FEP Effects
Sorption affects the rate at which radionuclides migrate through the EBS. The more a species is sorbed the slower it leaves the EBS. Sorption and the extent to which radionuclides are retarded depend on elemental concentrations and on the properties of the solid-water system under consideration. Changes in mineralogy and water chemistry may affect the amount of sorption.
NEA TN2 IFEP Reference(s)
Related IFEPs from the NEA TN2 List of Proposed IFEP Revisions [NEA/RWM/R(2013)8]