Iron-containing minerals, technetium

Reactions Between Technetium in Solution and Iron-Containing Minerals Under Oxic and Anoxic Conditions... 

Table V. Ferrous-Iron-Containing Minerals used in Technetium Sorption Studies...

Vandergraaf T. T., Tichnor K. V., and George I. M. (1984) Reactions between technetium in solution and iron-containing minerals under oxic and anoxic conditions. In Geochemical Behaviour of Disposed Radioactive Waste. ACS Symposium Series 246 (eds. G. S. Barney, J. D. Navratil, and W. W. Schultz). American Chemical Society, Washington, DC, pp. 25-44. 

Figure 2 is a combined E -pH diagram for technetium and iron and shows that, under certain conditions, technetium can be reduced by ferrous iron. To study the role of ferrous iron in the removal of technetium from solution, experiments were carried out with crystalline rock and ferrous minerals and TcO -containing solutions, under both anoxic and oxic conditions. 

Studies on the sorption of technetium by various minerals demonstrate that only a few percent of pertechnetate arc sorbed by tuff and basalt and that granite, dolomite, and shale sorbed only small amounts (< ()%). However, minerals containing copper, lead or iron sulphide, c.g. bournonite, galena, and chalcopyrite. sorbed pertechnetate... 

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