Air Filter Medium, Filter Medium Body, and Filter Element

An air filter medium comprising:

• a predetermined inflow side and a predetermined outflow side, wherein the air filter medium is configured to be flowed through from the predetermined inflow side to the predetermined outflow side in a flow direction;
• an ion exchanger layer comprising ion exchanger particles;
• an impregnation layer comprising impregnated active carbon particles, wherein the impregnation layer is arranged downstream of the ion exchanger layer;
• an active layer comprising non-impregnated active carbon particles;
• wherein the impregnated active carbon particles of the impregnation layer are impregnated with an acidic impregnation agent comprising at least one inorganic acid, wherein the at least one inorganic acid is selected from the group consisting of phosphoric acid, sulfuric acid, and hydrochloric acid;
• wherein a grammage of the ion exchanger particles in the ion exchanger layer lies in a range between 150 g/m2 and 350 g/m2;
• wherein a grammage of the impregnated active carbon particles in the impregnation layer lies in a range between 150 g/m2 and 350 g/m2.