Dutch Researcher Katja Heister investigated how electrical potential differences in clay layers influence the transport of salt and water through these. The outcomes of her research have important implications for new models of water transport, for example, those which predict the distribution of substances from waste deposits.
The transport of water and its solutes through clay plays an important role, for example, in the intrusion of seawater into the groundwater of coastal areas, the distribution of substances from polluted sludge or waste sites and the storage of radioactive or toxic waste in deep clay layers.
Until now, computer models for water transport did not consider transport due to electrical potential differences. However the effects of an electrical potential difference across different clay layers cannot be ignored and must be included in these models. The data and parameters obtained by Heister during her research can be used for this purpose.
Dr Katja Heister | alfa
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