title: Magnetite/mesocellular carbon foam as a magnetically recoverable fenton catalyst for removal of phenol and arsenic.
abstract: A magnetite-loaded mesocellular carbonaceous material, Fe(3)O(4)/MSU-F-C, exhibited superior activity as both a Fenton catalyst and an adsorbent for removal of phenol and arsenic, and strong magnetic property rendering it separable by simply applying magnetic field. In the presence of hydrogen peroxide, the catalytic process by Fe(3)O(4)/MSU-F-C completely oxidized phenol and As(III) under the conditions where commercial iron oxides showed negligible effects. Notably, the decomposition of H(2)O(2) by Fe(3)O(4)/MSU-F-C was not faster than those by commercial iron oxides, indicating that hydroxyl radical produced via the catalytic process by Fe(3)O(4)/MSU-F-C was used more efficiently for the oxidation of target contaminants compared to the other iron oxides. The homogeneous Fenton reaction by the dissolved iron species eluted from Fe(3)O(4)/MSU-F-C was insignificant. At relatively high doses of Fe(3)O(4)/MSU-F-C, total concentration of arsenic decreased to a significant extent due to the adsorption of arsenic on the catalyst surface. The removal of arsenic by adsorption was found to proceed via preoxidation of As(III) into As(V) and the subsequent adsorption of As(V) onto the catalyst.
authors.affiliation: Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Republic of Korea.
authors.forename: Jinyoung
authors.initials: J
authors.lastname: Chun
authors.forename: Hongshin
authors.initials: H
authors.lastname: Lee
authors.forename: Sang-Hyup
authors.initials: SH
authors.lastname: Lee
authors.forename: Seok-Won
authors.initials: SW
authors.lastname: Hong
authors.forename: Jaesang
authors.initials: J
authors.lastname: Lee
authors.forename: Changha
authors.initials: C
authors.lastname: Lee
authors.forename: Jinwoo
authors.initials: J
authors.lastname: Lee
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000032:analysis / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry; D052203:Ferrosoferric Oxide / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D019800:Phenol / Q000032:analysis / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: C045076:Fenton's reagent; D014874:Water Pollutants, Chemical; D019800:Phenol; D002244:Carbon; D006861:Hydrogen Peroxide; D007501:Iron; D001151:Arsenic; D052203:Ferrosoferric Oxide