Plutonium speciation onto mineral surface

Plutonium is the chemical element of the major concern at the nuclear legacy sites. In this work interaction of Pu(V,VI) with different minerals have been studied. Kinetics and pH-dependence of sorption together with Pu speciation by spectroscopic techniques were studied. To obtain the thermodynamic data the linear free-energy relationship (LFER) using experimental sorption data and published data was found. Using the obtained surface stability constants, the Pourbaix diagrams for Pu in the presence and in the absence of inorganic colloids were calculated to describe the sorption equilibrium in the system. (author)