Coal columnar activated carbon can be made from many kinds of material containing carbon, including wood, sawdust, coal, coke, peat, lignin, stone, hard Nutshell, sucrose pulp, bone, lignite, petroleum residues, etc. These substances. Wherein the coal and coconut shell has become the most commonly used raw material for manufacturing columnar activated carbon from coal. QUALITY manufacturing a columnar activated carbon is basically divided into two processes, the first process including dehydration and carbonization of the raw material is heated and dried at a temperature of from 170 to 600 ℃ make about 80% of the original organics carbonization. The second process is the activation of the carbonized product, this is accomplished via an activating agent such as water vapor and carbon reaction, to generate a mixed gas composed of CO and H2 in an endothermic reaction mainly for combustion carbonized product is heated to a proper temperature (800 to 1000 ℃), in order to burn except where all the decomposable material, thereby generating developed porous structure and a great specific surface area, and thus has a strong adsorption capacity. The porosity of coal columnar activated carbon can be divided into three categories according to the size of the aperture. Big hole: Radius 1000 - 1000000 A. Transition hole: Radius 20 - 1000 A. Microporous: radius - 20 A. QUALITY columnar activated carbon made by different materials having a different aperture size. Made by coconut shell coal columnar activated carbon has the smallest pore radius. Wood the QUALITY columnar QUALITY columnar activated carbon typically has a maximum of the pore radius, and they are used for adsorption of larger molecules, and almost exclusively in the liquid phase. Coal columnar activated carbon for the first type of granular coal columnar to use in the field of water treatment in the city that is made of wood, called charcoal. Coal columnar coal columnar activated carbon pore size in between. In on QUALITY columnar QUALITY columnar activated carbon, lignite QUALITY columnar QUALITY columnar activated carbon than anthracite QUALITY columnar QUALITY columnar activated carbon has a transitional porosity and larger average pore size, and therefore can effectively remove the water and organic macromolecules. Usually QUALITY columnar QUALITY columnar activated carbon used in water treatment, its surface area is not necessarily be too large, but should have a transitional porosity and larger average pore size. Japanese market sale of some of the liquid phase 10 QUALITY columnar QUALITY columnar activated carbon having the following characteristics: specific surface area of ??850 to 1000m2 / g, a pore volume of 0.88 to 1.5 ml / g, and an average pore radius of 40 to 50A. Coal columnar activated carbon adsorption performance in the production process, to improve the only way is to control the production process, so that the unit volume is increased as much as possible within QUALITY columnar activated carbon pore structure. So higher adsorptive QUALITY columnar activated carbon contains a large number of pores, so that its density is becoming smaller, which is why adsorbing better feel more light columnar activated carbon from coal reasons (provided using the same kinds of raw materials production, water-soaked or adsorption of other substances). The same time as the higher production costs of coal columnar activated carbon adsorption increased, and is growing exponentially, which is useful for the market low adsorption coal columnar activated carbon posing the high adsorption Coal columnar activated carbon sales motivation.