Activated carbon is a micro porous and neutral adsorbent with a very large internal surface area, which can go as large as 1500 square meters per gram. Its developed internal structure makes carbon an excellent adsorption material, used to remove organic compounds from liquids and gases. Suitable for specific applications, activated carbon types are selected by taking into account the disposal unit adsorption characteristics, or by laboratory test results. Activated charcoal is able to absorb both organic and some inorganic compounds, such as heavy metals. Oxidizing substances such as chlorine or ozone may also be removed. Pollution is adsorbed on both the carbon surface or inside of it. Activated charcoal, as a neutral material, does not cause any side-effects in technological processes. It is usually derived from charcoal.