Activated charcoal differs in its use from that used to cook food in a barbecue pit. The porous nature of activated charcoal enables it to absorb odours from the air. You can recycle your used activated charcoal, also called activated carbon, by baking out the odours and reactivating it. Reuse your charcoal just two or three times, as completely cleaning the pores of the activated carbon proves difficult with home appliances. Look for activated charcoal in the aquarium-supplies area of pet stores or in garden centres.
Let the activated charcoal dry completely if damp from absorbing atmospheric moisture.
Heat the oven to 148 degrees C and scatter the charcoal in a single layer on the baking tray.
Set the activated charcoal into the oven for one hour at 148 degrees C to bake out the odours and impurities.
Let the activated charcoal cool completely before placing in an open shallow dish in an area from which you want to remove odours.