Removal of NO2 gases in fixed beds was investigated by using brownish, whitish and regenerated whitish sepiolite and perlite as adsorbents. For this purpose, NO2 was produced by reaction of copper with nitric acid. The produced gas was mixed with air and the mixture was sent through a fixed bed. Studies were conducted using various gas flow rates, NO2 concentrations, packing sizes and heights of bed. Remaining NO2 within the gas mixture leaving the column, unadsorbed on packing, was further absorbed by passing it through a series of washing bottles, filled by a solution of NaOH. At the end of the study, it was observed that the adsorption capacity of sepiolites, especially whitish sepiolite, was much higher than that of perlite. Additionally, it was seen that its adsorption capacity increased with increasing bed height, particle size, NO2 concentration and decreasing gas flow rate.