http://www.activatedcarbonxk.com/ Standard: GB/T3491-1999 or GB/T12496-1999 ASTM, AWWA Coal Activated Carbon for Purified Water Treatment Application: The columnar coal activated carbon is mainly applied to the treatment, packing, dechlorinate and oil purification of city life water, purified water, distilled water, ultrapure water, and the advanced treatment of industrial water.