Blind prediction of Kd values from NORM sites using the Smart-Kd approach

The behavior of naturally occurring radioactive materials (NORM) is often defined using distribution coefficients (K_d) in dispersion calculations. Knowledge of such K_d values is therefore of great importance to protect people and the environment from the effects of radioactive radiation. At the same time, the comprehensive determination of K_d taking into account variable geochemical parameters is difficult, in many cases impossible. The theoretical calculation of K_d values from thermodynamic sorption data using the Smart-K_d approach can help here. Within the context of a blind prediction exercise, the possibilities and limits of the theoretical calculation of K_d values were tested.