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The most effective defluoridation technology in sewage treatment - activated carbon

Updated: Jul 3, 2023

What is activated carbon?

Activated Carbon is a black porous solid carbon.

Its main component is carbon, and contains a small amount of oxygen, hydrogen, sulfur, nitrogen, chlorine and other elements. It is irregularly arranged in structure, and there are pores between cross-connections. When activated, carbon tissue defects will occur. It has low bulk density, large specific surface area and strong adsorption performance. It is an industrial adsorbent with a wide range of uses. The specific surface area of ordinary activated carbon is between 500 and 1700m2/g.

Activated carbon is a very fine carbon particle with a large surface area, and there are even smaller pores in the carbon particle-capillaries. This kind of capillary has a strong adsorption capacity, and due to the large surface area of the carbon particles, it can fully contact with the gas (impurity). When these gases (impurities) meet the capillary, they are adsorbed and play a role in purification.

PFCs——"New Star in the field of organic pollutants

Perfluorinated compounds (PFCs) are emerging persistent organic pollutants (POPs), which are highly chemically stable and bioaccumulative, causing toxic effects.

Because of the waterproof properties of PFCs, it can be found everywhere in our life. From non-stick pans and popcorn bags to personal care products and electronics, PFCs are everywhere.

Existing studies have shown that it is difficult to degrade PFCs in water using traditional biological treatment techniques, while electrochemical removal techniques, activated carbon and resin adsorption, advanced oxidation, nanofiltration, and reverse osmosis all have certain removal effects on PFCs. Among them, adsorption is one of the most effective methods to remove PFCs, and high-efficiency adsorbents such as activated carbon, resin, chitosan, hydrotalcite, and alumina have been reported.

Activated carbon - the "king of cost performance" in the adsorption field

Activated carbon has a series of advantages such as wide source of raw materials, low cost and high efficiency, showing unique treatment advantages. Adjusting the pore structure of activated carbon by appropriate methods can improve the adsorption effect of activated carbon on PFCs.

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