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Geological Society, London, Special Publications; 1998; v. 128; p. 265-280;
DOI: 10.1144/GSL.SP.1998.128.01.20
© 1998 Geological Society of London

Section 6: Groundwater Pollution by Radionuclides

The retardation and attenuation of liquid radioactive wastes due to the geochemical properties of the zone of injection

Igor N. Solodov

Department of Rare Metals Geology and Radiogeoecology, Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences, Staromonetnii per. 35, Moscow 109017, Russia

Natural geochemical factors are of significant importance for the design of underground waste disposal systems and their subsequent operation. Analysis of geochemical similarities between liquid radioactive waste (LRW) disposal sites and sulphuric acid uranium-leaching mines in sandy aquifer horizons, has proved to be a productive approach, permitting predictive understanding of the hydrogeochemical processes which might develop in aquifer horizons subject to the injection of LRW. The approach allows the attenuative geochemical properties of terrigenous aquifers to be estimated. It is demonstrated that a number of geochemical processes (neutralization, reduction, sorption, precipitation, pore occlusion and radiolysis) in the injection zone of such aquifers may lead to attenuation, degradation and solid-phase immobilization of contaminants associated with LRW.