What is activated charcoal and why is it used in filters? - coal and gas bbq

Charcoal is carbon.(For more information on how charcoal is made, see this question for the day.) Activated carbon is charcoal treated with oxygen, which can open millions of small holes between carbon atoms.According to the Encyclopedia of Great Britain, the surface area will be 300-using special Manufacturing Technology-2,000 per gram.These so-Known as active or active charcoal, it is widely used to absorb odor or colored substances from gas or liquid.The word "adsorption" is very important here.When a substance absorbs something, it is attached to it by chemical attraction.The huge surface area of activated carbon provides it with numerous bonding sites.When certain chemicals pass by the side of the carbon surface, they are attached to the surface and captured.Activated carbon is good at capturing other carbon-Based on impurities ("organic" chemicals), and substances such as chlorine.Many other chemicals are not attracted to carbon at all.-Sodium, nitrate, etc.--So they went straight through.This means that the activated carbon filter removes certain impurities while ignoring other impurities.This also means that the activated carbon filter stops working once all the bonding points are filled.At this point, you must replace the filter.See the next page for more links.