COLL 52 |
| Qiuli Lu, Dept. of Civil Engineering, University of Cincinnati, P.O. Box 210071, Cincinnati, OH 45221-0071 and George A Sorial, Civil & Environmental Engineering Department, University of Cincinnati, P.O. Box 210071, Cincinnati, OH 45221-0071. |
| Adsorption isotherms of five phenolic compounds with different functional groups (chloro, ethyl, methyl, and nitro) on three activated carbons, (GAC) F400 and two types of activated carbon fibers (ACFs), ACC-10 (17.5 A) and ACC-15 (21 A) were conducted in this study. Anoxic (absence of molecular oxygen) and oxic (presence of molecular oxygen) conditions were considered. Both F400 and ACC-15, showed higher adorptive capacities under oxic conditions as compared to anoxic conditions except for 2-nitrophenol. The methyl functional group showed the largest difference while the ethyl and chloro were similar for F400 and ACC-15. ACC-10 showed only higher oxic adsorption isotherms for phenol than anoxic ones. Binary adsorption isotherms were conducted for four binary solute systems consisting of 2-methylphenol and each of the remaining adsorbates in order to simulate practical usage of adsorbents. The ideal adsorbed solution theory (IAST) predicted well all binary systems for ACC-10 and only the binary systems under anoxic conditions for the remaining two adsorbents. The poor model predictions for GAC and ACC-15 under oxic conditions are attributed to oligomerization of the adsorbates on the surface of activated carbon. |
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Symposium in Memory of Arthur W. Adamson
2:00 PM-5:40 PM, Sunday, March 28, 2004 Marriott -- Orange County 4, Oral
Division of Colloid and Surface Chemistry |