Center for Academic Enrichment and Outreach
University of Nevada, Las Vegas
Las Vegas (Nev.)
Granular activated carbon (GAC) is a porous, fine-grained adsorbent rich in carbon and it has been widely applied in water and wastewater treatment processes. For instance, GAC can be utilized in adsorption processes. Adsorption is a purification technique in which soluble impurities are removed from the solvent and adhere to the surface and pores of a solid material. Ozonation is extensively used in the treatment of wastewater as well. (Turhan, Durukan, Ozturkcan, & Turgut, 2012). Because of its high oxidizing power, ozone can break down colored substances like dyes in wastewater, which improves the aesthetics of water. However, to treat heavily colored industrial wastewater (e.g. textile wastewater), a high volume and concentration of ozone is necessary. This makes the application of ozone expensive.
Adsorption using granular activated carbon (GAC) has been proven to be a superior method during the removal of methylene blue from water (Vargas, Cazetta, Kunita, Silva, & Almeida, 2011). When the adsorption capacity is reached, GAC is either regenerated or disposed to the landfill; the latter is the most common. This makes the application of GAC alone an expensive technology during the industrial treatment of dye. The purpose of this study is to concentrate methylene blue dye on GAC through column adsorption and perform in-situ regeneration of GAC using ozone. This will allow for repeated use of the GAC, and the process should be more efficient and less expensive than adsorption or ozone alone.
Adsorption; Methylene blue; Ozonation; Granular activated carbon
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Vu, T. X.,
Kajjumba, G. W.,
Marti, E. J.
Adsorption of Methylene Blue and In-situ Reactivation of Granular Activated Carbon (GAC) with Ozone.
Available at: https://digitalscholarship.unlv.edu/lsamp_posters/8