Evaluation of radon progeny mitigation techniques (HEPA filtration, ionization, electrostatic deposition) and their...

Radon and its short-lived progeny are recognized as significant contributors to the radiological dose received indoors and are associated with increased lung cancer risk. This study evaluates the effectiveness of various air purification technologies-including HEPA filtration, ionization, electrostatic deposition, and combined systems-in reducing airborne concentrations of radon progeny (PAEC, ²¹⁸Po, and ²¹⁴Po) in a controlled, non-ventilated environment. Measurements were carried out using active and passive detectors over multiple campaigns with and without air purifiers. Statistically significant reductions were observed for all purification methods tested, with the greatest decrease found for ²¹⁴Po and PAEC, and more moderate reductions for ²¹⁸Po. The combination of HEPA filtration and ionization proved most effective, achieving reductions exceeding 40% in PAEC. The results confirm that air purification systems, particularly those using ionization and electrostatic principles, can play a crucial role in mitigating radon progeny exposure in enclosed spaces. These findings support the practical implementation of air purification strategies in high-risk environments such as underground workplaces, shelters, and laboratories.