Home – Home – Jornals – Chemistry for Sustainable Development 2008 number 4

For the example of the Nizhnekansk granitoid massif as an assumed ground for burying highly radioactive wastes (HRW), the application of the geoecological approach for choosing the matrices for long-term burial of HRW in granitoid massifs allowed us to choose the minerals specific for granitorids; these minerals are able to include definite fractions of radionuclides isomorphically. The matrix materials similar to the structural types of frame feldspar and feldspathoids (to bury ^{135, 137}Cs and ⁹⁰Sr), as well as zircon, monazite, cosnarite (NZP), apatite, sphene (to incorporate actinides and lanthanides) correspond to the principle of the physicochemical compliance of the matrix with the enclosing rocks of granitoids, which will allow one to provide geochemical equilibrium during long-term burial of HRW in a granitoid massif. We demonstrate the possibility to obtain these mineral-like materials of the predictable structural type with the application of promising polyfunctional porous materials based on the readily available raw material - hollow aluminosilicate microspheres (cenospheres) from volatile ash generated in the combustion of thermal coal.