< Topic >Until chlorine dioxide gases which operated the purification of around environment safety are designated to the person as density low, it is to require long haul. SolutionsChlorine dioxide gas processing structures 20 which make chlorine dioxide gases in the suffering processing air decrease which includes chlorine dioxide gases, the space and the fan it has 23 where the suffering processing air circulates and contact layer and ultraviolet radiation expedient, in the steel wool 21 where contact layer sets iron-made thin line cottony being something which the dampness it could point the water, fan 23 circulating the suffering processing air inside the space, in the circulating route it makes the ultraviolet ray contact layer apply with ultraviolet radiation expedient 24 when, it makes the suffering processing air contact layer contact.【課題】周囲環境の浄化に作用した二酸化塩素ガスを人に安全な低濃度とさせるまでに長時間を要することである。【解決手段】二酸化塩素ガスを含んだ被処理空気中の二酸化塩素ガスを低減させる二酸化塩素ガス処理構造20であって、被処理空気が循環される空間と、ファン23と、接触層と、紫外線照射手段とを備え、接触層が鉄製の細線を綿状に固めたスチールウール21に水を湿潤させたものであって、ファン23が空間内で被処理空気を循環させて、その循環経路において接触層に紫外線照射手段24により紫外線を照射させた状態で、被処理空気を接触層に接触させる。
