Files in this item



application/pdf3301268.pdf (3MB)Restricted to U of Illinois
(no description provided)PDF


Title:Roles of Background Compound Molecular Size and Adsorbent Pore Size Distribution in Competitive Adsorption on Activated Carbon
Author(s):Tang, George Chun Chung
Doctoral Committee Chair(s):Mariñas, Benito J.; Snoeyink, Vernon L.
Department / Program:Civl and Environmental Engineering
Discipline:Civl and Environmental Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Environmental
Abstract:For the effect of PSD, four commercially available PAC produced by Norit Netherlands, which included W20, W35, SA Super and SA UF, as well as one proprietary adsorbent which consisted of extensive secondary micropore and mesopore volumes, labeled as Pellet II, were evaluated for atrazine adsorption in the presence of CR in order to assess the role of PSD on competitive adsorption. The capacity for CR adsorption correlated well with pore volume between 13 and 350 A. Atrazine adsorption capacity reduction caused by CR was similar for the four Norit PAC, but was significantly higher for Pellet II. Kinetic experiments showed that increasing secondary micropore and mesopore volumes could alleviate pore blockage effect, that is, an adsorbent could adsorb more CR before the decrease in atrazine Ds become significant. At the highest CR surface loading achieved, atrazine Ds decreased by more than two logarithmic orders of magnitude for the Norit PAC, but only one logarithmic order of magnitude for Pellet II. Overall, our result suggested that increasing the secondary micropore and mesopore to a certain extent could shift the mechanism of competition from pore blockage to direct competition.
Issue Date:2007
Description:153 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2007.
Other Identifier(s):(MiAaPQ)AAI3301268
Date Available in IDEALS:2015-09-25
Date Deposited:2007

This item appears in the following Collection(s)

Item Statistics