Granular activated carbon is defined as the activated carbon being retained on a 50-mesh sieve. GAC products are made from coconut shell, coal, lignite, and anthracite products. Adsorption is the primary mechanism by which GAC works and the primary reason it is widely used to reduce undesirable taste, odor and color and to improve the safety of drinking water. Coconut graular activated carbon is mainly used for gold recovery. And 4*8mesh coconut shell activated carbon is usually applied for some heavy metals removal from the waste gas. According to different applications, clients can choose different activated carbon types according to the specific working conditions.