The use of charcoal was recorded in ancient Egypt around 3750 BC.
1.In 1900, the British first invented the method of making activated carbon by carbonizing plants with metal chlorides.
2.In 1917, both sides used activated charcoal in gas masks during World War I.
3.In 01927, a malodorous accident occurred at the Chicago Waterworks in the United States. Since then, activated carbon has been widely used to deodorize tap water.
4.In 1930, the first water plant using granular activated carbon adsorption tanks to deodorize was built in Philadelphia, USA.
5.In the late 1960s and early 1970s, due to the advent of large-scale production and regeneration equipment for coal granular charcoal, developed countries carried out research work on the use of activated carbon to adsorb and remove trace organic matter in water, and advanced treatment of drinking water. Granular activated carbon purification devices have been successively built and put into production in the United States, Europe, Japan and other countries. More than 90% of water plants in the United States that use surface water as their water source have adopted the activated carbon adsorption process.
