A method, and systems for implementing such method, for purifying and
conditioning air of weaponized contaminants. The method includes wetting
a filter packing media with a salt-based liquid desiccant, such as water
with a high concentration of lithium chloride. Air is passed through the
wetted filter packing media and the contaminants in are captured with the
liquid desiccant while the liquid desiccant dehumidifies the air. The
captured contaminants are then deactivated in the liquid desiccant, which
may include heating the liquid desiccant. The liquid desiccant is
regenerated by applying heat to the liquid desiccant and then removing
moisture. The method includes repeating the wetting with the regenerated
liquid desiccant which provides a regenerable filtering process that
captures and deactivates contaminants on an ongoing basis while also
conditioning the air. The method may include filtration effectiveness
enhancement by electrostatic or inertial means.