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Influence of Ozone Treatment on Cr(VI) Adsorption of Activated Carbon  

Park, Soo-Jin (Dept. of Chemistry, Inha Univ.)
Kim, Byeong-Joo (Dept. of Green Chemistry & Environmental Biotechnology, Univ. of Science & Technology)
Publication Information
Korean Chemical Engineering Research / v.44, no.6, 2006 , pp. 644-649 More about this Journal
Abstract
In this paper, the Cr(VI) adsorption behaviors of activated carbons (ACs) treated by various ozone treatment conditions were studied. The surface properties of the ACs studied were determined by pH, acid-base, and FT-IR measurements. $N_2$ adsorption isotherm characteristics at 77K were confirmed by BET equation, Boer's t-plot method, and Horvath-Kawazoe's slit pore model. Also, the total Cr adsorption amount onto the ACs was measured by ICP-AES. As a result, the ozone treatment led to an increase of oxygen-containing polar functional groups and total acidity as well. Meanwhile, the specific surface areas or micropore volumes were slightly decreased after the ozone treatment due to the micropore filling or blocking. Nevertheless, the total Cr adsorption of ACs was increased with increasing of the ozone treatment time, attributed to the good interaction between Cr ions and polar functional groups on the ACs.
Keywords
Activated Carbons; Ozone Treatment; Cr(VI) Adsorption; Oxygen-Containing Functional Groups; Microstructure;
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Times Cited By KSCI : 1  (Citation Analysis)
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