A reactor unit includes a bed of desiccant and a bed of media for treating pollutants. The media includes an adsorptive material and a reactive material. The adsorptive material is selected from at least one of activated carbon and zeolite. The reactive material is selected from at least one of potassium permanganate and sodium hydroxide. The adsorptive material is impregnated with reactive materials to enhance performance. A method of using the reactor unit includes delivering a moldable material into a mold. An effluent stream carrying pollutants produced by the moldable material flows through the reactor unit.