In this research, several mineral based filters have been tested for their potential to reduce the exposure in terms of the total effective dose for mixed radon and thoron indoor atmospheres. For this purpose, the well-defined microporous structure of natural materials that were selected according to their surface adsorption capacity was used to prepare cylindrical mineral filters. The tests were performed inside a small laboratory type closed chamber providing stable conditions. Based on radioactive equilibrium in natural rocks, the activity of Ra-226 will also develop accordingly. Radium-226 is the parent of Radon-222 gas and produces Radon 222 during its decay. In the initial experiments of the project, radon gas was expected to reach the equilibrium within the vessel by following the measurements of the radon gas from the uranium colloids in the closed container. Rn-222 gas was collected in a closed container and used in experiments. After the Radon accumulation and radon, measurement tests were carried out successfully and their values were recorded. The results obtained in the preliminary experiments where the reference samples can hold radon gas between 63 - 72%As a result of this research, it was found that the effects of each mineral in the composite filters have its own adsorption property to hold radon gas.
Anahtar Kelimeler: Adsorption, Filter, Mineral-Based, Radon