The mitigation of acidic gases (e.g. sulfur oxides, hydrogen sulfide and nitrogen oxides) is essential for various applications, including in the purification of air used in fuel cells, data centers and semiconductor fabrication. This talk will focus on our research efforts in the design, synthesis, characterization and 3D printing efforts for ionic liquid-activated carbon composite filter media for acidic gas filtration from air. Emphases will be given on research on metal based ionic liquids/salts of type Mx[R]y[C2mim]z where R is an acetate or citrate anion, for sulfur dioxide mitigation. In this talk, results and analysis on the computational modeling, DLP and DIW 3D printing processes, and gas sorption testing of the filter media will be provided, including the sorption performance (breakthrough times, selectivity, and sorption capacity).