1. Activated Carbon
As coal is processed from a variety of sources of materials like ash shell peanuts (peanut), coconut shells or coal. These materials are heated slowly in vacuum and then activated by chemical oxidation and gas properties in extreme temperatures. This process creates tiny holes work and keep absorbing impurities. Activated carbon water filters through two parallel processes:
1.1 Filter mechanics , particles retained in the sediment pores ,
2.2 Absorption of water-soluble contaminants by surface absorption mechanism or ion exchange .
Activated carbon is a porous material , there are many small and big holes . Under the electron microscope , looks like a charcoal particles ants' nest . Therefore, the surface area exposed to its very wide to absorb impurities . ( Depending on the source material , the total surface area of activated carbon 1/2kg longer than the width of a football field )
2 . Structural forms of activated carbon
2.1 . Bran powder ( Powered - PAC ) here is the kind of manufactured according to old technology , now commonly used in battery production , ac - regulation . There are a number of manufacturers using this type of glue to mix with charcoal tubes molded into the 3rd form look like below.
2.2 . Granules ( Granulated - GAC ) are small lumps , inexpensive , suitable for deodorant . However, the water tends to flow through the gaps between the carbon particles instead go through the small hole .
2.3 . Blocks feature ( Extruded Solid Block - SB ) is the most effective type to filter sediment , coliform bacteria , lead , toxins , disinfection and deodorization chlorine mystery . This type is made from a piece of coal , is pressed format under 800 tons of pressure to be very sure .
Activated charcoal solid textures
Filter performance depends primarily on the following factors:
- Physical properties of activated carbon, such as texture, size, hole density, the area of contact;
- Physical and chemical properties of these types of contaminants for removal
- Exposure time of the water with activated carbon as long as possible to absorb.
Activated charcoal is effective only to a certain amount of water. After filtering a volume of water as instructed by the manufacturer (only reputable firms only under this criterion), coal will not be able to absorb the smell.
Activated charcoal used in the food industry have been tested by NSF.
3. Application of activated carbon
With special structure and is capable of removing produced by advanced process technology, activated charcoal hundreds of chemical compounds that can be harmful to humans
