Study of potential capacity as adsorbent of Moringa oleifera substrates for treatment of radon contaminated air in indoor spaces: Preliminary test

Radon is a radioactive gas known to be a human carcinogenic element that causes lung cancer. The Directive 2013/59/EURATOM establishes action plans for its monitorization and control in water and air specially at workplaces. There are several techniques to reduce the concentration of radon in air mainly based on improving ventilation rates. However, intelligent and energy-efficient buildings are well insulated and have centralized ventilation systems where air is recirculated continuously. This strategy has a negative influence on radon accumulation at indoor spaces. So, ventilation systems should be composed by filters with suitable materials to adsorb radon from indoor air. This work studies the radon adsorption ability of the most used adsorbent (activated carbon) and some not-processed substrates coming from Moringa oleifera, a natural plant with high potential as adsorbent for heavy metals and coagulant in and water treatment. The radon adsorption efficiency of the different solids is analyzed, showing promising results for radionuclide removal from air.