Activated carbon has many different shapes and different sizes of pores, the total area of all is the pore wall surface area, surface area per gram of carbon as high as 700 to 1,600 cubic meters, because such a large surface area, so that everyone has strong adsorption capacity of activated carbon. 
 Adsorption characteristics of activated carbon pore structure not only by the impact, but also by the surface chemical properties. 
 Activated carbon with each other, but also contains two substances, one to chemical bonding of elements such as oxygen and hydrogen; the other is the ash, the ash content varies with different types of activated carbon, coconut shell carbon ash content of less than 3%, while activated carbon from coal ash as high as 20% to 30%, activated carbon is relatively low in sulfur content, good quality activated carbon should not be detected in the sulfide. 
 The presence of hydrogen and oxygen, the nature of the activated carbon has a great influence, because these elements combine with the carbon to bond, leaving the surface area of activated carbon with various organic functional groups in the form of oxides and hydrocarbons, the oxides and carbon hydrides to activated carbon and chemical adsorbate molecules, showing that activated carbon adsorption process in the selective absorption characteristics. 
 Activated carbon adsorption of three types. 
 1. Physical adsorption 
 2. Chemisorption 
 3. Exchange adsorption 
 In the treatment process, activated carbon adsorption process, mostly the combined effect of several. 
 Features: powdered activated carbon is good husk and sawdust, with a special production process refining. There are two physical and chemical methods. The appearance of fine black powder, odorless, tasteless, in general, are not dissolved in solution. With a large surface area, adsorption ability, high purity, filter fast, quality management stable. 
 Use: powdered activated carbon for sugar, pharmaceuticals, beverages and organic solvent bleaching, cleaning, refining and purification, and in water purification, sewage treatment widely used. Company can develop according to customer special specification activated carbon species.