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Removal Characteristics of Phenol at Advanced Oxidation Process with Ozone/Activated Carbon Impregnated Metals  

Choi, Jae Won (School of Chemical Engineering and Bioengineering, University of Ulsan)
Yoon, Ji Young (School of Chemical Engineering and Bioengineering, University of Ulsan)
Park, Jin Do (Department of Chemistry & Environmental, Ulsan College)
Lee, Hak Sung (School of Chemical Engineering and Bioengineering, University of Ulsan)
Publication Information
Applied Chemistry for Engineering / v.23, no.3, 2012 , pp. 302-307 More about this Journal
Abstract
Advanced oxidation processes (AOP) such as O3/activated carbon process and O3/catalysts process were used to compare the decomposition of phenol. Catalysts such as Pd/activated carbon (Pd/AC), Mn/activated carbon (Mn/AC), Co/activated carbon (Co/AC) and Fe/activated carbon (Fe/AC) were prepared by impregnation of Pd, Mn, Co and Fe into the activated carbon of pellet form, respectively. Based on an hour of reactions, the following descending order for the decomposition ratios of dissolved O3 to the 1.48 mg/L of saturated dissolved O3 was observed: Mn/AC (45%) > Pd/AC (42%) > Co/AC (33%) > AC (31%) > Fe/AC (27%). The removal efficiencies of phenol were also arranged in the descending order of AOP as follows: Mn/AC (89%) > Pd/AC (85%) > Co/AC (77%) > AC (76%) > Fe/AC (71%). The remaining ratios (C/Co) of TOC (total organic carbon) after an hour of experiments were arranged in the ascending order of AOP as follows : Pd/AC (0.29) < Mn/AC (0.36) < AC (0.40) < Co/AC (0.49) < Fe/AC (0.51). However, the catalytic effects in the Co/AC and the Fe/AC processes were little in comparison with O3/AC process. The maximum concentrations of intermediates such as hydroquinone and catechol formed from the decomposition of phenol were arranged in the ascending order of AOP as follows: Pd/AC < Fe/AC < Co/AC < AC < Mn/AC. In the case of Pd/AC process, these intermediates were almost disappeared after an one hour of reaction.
Keywords
phenol; ozone; ozone/catalyst process; Pd/activated carbon; Mn/activated carbon;
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