Activated carbon captures large quantities of air contaminants due to a high surface area which gives out a clean, fresh air.
Understand the chemical composition here - http://www.nichem.com/activated_carbon.htm
Nichem Co. has been supplying activated carbon, carbon filter, replacement for municipal water and wastewater treatment plants throughout the US. So, if you require activated carbon for waste water treatment and odor removal, then you can contact Nichem.