Activated carbon is also called active carbon, isolating agent or adsorbent. The main raw material with wood, coal, coconut shell activated carbon, nut shell, apricot shell, shell, peach shell, etc. As a raw material. Activated carbon raw material by physical method and chemical method for raw material crushing, removing impurity, carbonization, activation, sieve, pickling, rinsing, drying and so on a series of process. Activated carbon as a kind of carbonaceous adsorption material, widely used in the gas phase and liquid phase adsorption purification, activated carbon has a strong physical adsorption and chemical adsorption effect, can remove some organic compound adsorption and achieve effect, use of this principle, we can quickly and effectively remove all kinds of water quality of harmful substances, odor, pigment, purification, reduce COD, (stupid, toluene, xylene, oil and gas, CS2, acetone and other organic solvent recovery and adsorption), catalyst, catalyst carrier, etc., make water quality, catalyst, stupid directly and quickly improve efficacy. characterization of activated carbon adsorption, often use empty hole testing methods have nitrogen adsorption method, generally in the test surface can be calculated at the same time pore volume, pore volume, and is closely related to the filling density of active carbon, and is inversely proportional to the filling density index.