Adsorption Behavior of Radionuclides on Granite

In this paper, the adsorption behavior of radionuclides on granite is reviewed. The results show that: (1) the properties of granite (including morphology, chemical composition and acid-base chemistry of granite surface) have certain influence on the adsorption of radionuclides on granite; (2) the adsorption rate of radionuclides onto granite surface is relatively fast and the adsorption can be carried out at a short time; (3) the influences of environmental parameters such as pH, ionic strength, temperature, ions from groundwater, organic matters and anaerobic condition on adsorption of radionuclides onto granite vary with different adsorbates in system; (4) the adsorption mechanism of radionuclides on granite can be deduced indirectly using surface complex model based on the basic adsorption data, which extends research ideas of nuclide migration; (5) the advanced spectroscopy technologies such as XPS can be applied for deducing the adsorption mechanism of radionuclides on granite in molecular and atomic level.