Active carbon, also known as activated charcoal, is a highly porous material that features a very large surface area. This allows it to adsorb contaminants effectively, making it ideal for use in water filtration, air purification, and other applications. While "active carbon" is the most common term for this substance, there are many other synonyms that people might use to refer to it. These include activated charcoal, activated carbon, activated coal, activated carbon fiber, and activated carbon powder. Regardless of the specific term used, active carbon is an incredibly useful and versatile material that plays a crucial role in many important industries and applications.