Water Quality Control
Published Online: 15 JUL 2005
Copyright © 2005 by John Wiley & Sons, Inc.
How to Cite
Kazmi, A. A. 2005. Activated Carbon—Powdered. Water Encyclopedia. 2:86–88.
- Published Online: 15 JUL 2005
The most commonly used adsorbent in water and wastewater treatment is activated carbon. Activated carbon is manufactured from carbonaceous material such as wood, coal, or petroleum residues. A char is made by burning the material in the absence of air. The char is oxidized at higher temperatures to create a very porous structure. The “activation” steps provide irregular channels and pores in the solid mass, resulting in a very large surface-area-per-mass ratio. Surface areas ranging from 500 to 1500 m2/g have been reported, and all but a small surface area is in the pores. Once formed, activated carbon is pulverized to a very fine powder (Fig. 1). The size is predominantly less than 0.075 mm (200 sieve). Dissolved organic material adsorbs to both exterior and interior surfaces of the carbon.
- refractory organics;
- water treatment