Activated carbon (AC) physical and chemical properties

[Physical and chemical properties] Black porous powder or granules, odorless and tasteless

The main component of activated carbon is carbon, with a content of 90%-95%, in addition to oxygen (about 3.

Activated carbon used in water treatment mainly includes granular activated carbon (GAC) and powdered activated carbon (PAC)

Compared with most other adsorbents, the unique surface characteristic of activated carbon is that the surface is non-polar, or it is weakly polar due to the presence of oxygen-containing functional groups and inorganic impurities on the surface

(1) Activated carbon is the only adsorbent in commercial adsorbents that does not need to be strictly dried in advance before separation and purification operations such as air purification

(2) Because of its huge accessible inner surface (and huge pore volume), activated carbon can adsorb more non-polar and weakly polar organic molecules than other adsorbents

(3) The adsorption heat or bond strength of activated carbon is lower than other adsorbents, because the main force of activated carbon adsorption is only non-specific force and van der Waals force

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