IONIC ADSORPTION OF SAND – AND CLAYSTONES
It is well-known that the contamination of soils or rocks, developing as a result of industrial, agricultural or some other activity, is a significant environmental problem. The task in these cases is to determine the kind and the amount of the contaminating element as well as to indicate its areal distribution. To complete these tasks, it is necessary know how the different soils and rocks do adsorb different ions, with a special regard to the toxic elements. We mention here only a few examples from the large amount of papers on this topic. Our own experimental results as well as the requirements for environmental mapping have proven the necessity and importance of these experiments. The importance of ionic adsorption is demonstrated by the fact that research on this topic have a high priority in the US. Experimental results on ionic adsorption of certain rocks are presented in this paper. Several actions were investigated in different anionic environments. It has to be mentioned that precipitation of minerals in a small amount takes also place parallel with the adsorption. However, since it was not possible to distinguish these processes, we consider later the phenomena as adsorption, whether precipitation occurs or not.
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