... treated by acid wash,carbonization and activation with qualified coal from TaiXi as raw material. It is the first choice ... used in purification and treatment of water, purification of gas, recovered solution,chemical catalyst and carries, and desulphurization of flue gas and raw material.2.Specifications: ... ASTM,JIS K.3.Sample Picture: Sample is available and free under 1 kg.4.Packing Picture: 25kg/bag ...