Solubility calculations and their interpretation in pa

Typical problem areas encountered in the derivation of solubility limits on the basis of thermodynamic predictions are elucidated with the help of characteristic examples. For each of the examples an interpretation in view of the requirements of performance assessment is made and measures to resolve the problems met are proposed. On the basis of the selected examples its concluded that further activities should primarily focus on the determination of solubility-limiting phases and on a better understanding of system key parameters like the redox potential. For trace elements it is suggested to explore potential effects which are associated with the formation of solid solutions. (author)