title: Reuse performance of granular-activated carbon and activated carbon fiber in catalyzed peroxymonosulfate oxidation.
abstract: Recently, activated carbon was investigated as an efficient heterogeneous metal-free catalyst to directly activate peroxymonosulfate (PMS) for degradation of organic compounds. In this paper, the reuse performance and the possible deactivation reasons of granular-activated carbon (GAC) and activated carbon fiber (ACF) in PMS activation were investigated. As results indicated, the reusability of GAC, especially in the presence of high PMS dosage, was relatively superior to ACF in catalyzed PMS oxidation of Acid Orange 7 (AO7), which is much more easily adsorbed by ACF than by GAC. Pre-oxidation experiments were studied and it was demonstrated that PMS oxidation on ACF would retard ACF's deactivation to a big extent. After pre-adsorption with AO7, the catalytic ability of both GAC and ACF evidently diminished. However, when methanol was employed to extract the AO7-spent ACF, the catalytic ability could recover quite a bit. GAC and ACF could also effectively catalyze PMS to degrade Reactive Black 5 (RB5), which is very difficult to be adsorbed even by ACF, but both GAC and ACF have poor reuse performance for RB5 degradation. The original organic compounds or intermediate products adsorbed by GAC or ACF would be possibly responsible for the deactivation.
authors.affiliation: a Key Laboratory of Marine Environment and Ecology , Ministry of Education , Qingdao , People's Republic of China.|b Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE) , Qingdao , People's Republic of China.|c College of Environmental Science and Engineering , Ocean University of China , Qingdao , People's Republic of China.
authors.forename: Shiying
authors.initials: S
authors.lastname: Yang
authors.affiliation: a Key Laboratory of Marine Environment and Ecology , Ministry of Education , Qingdao , People's Republic of China.|c College of Environmental Science and Engineering , Ocean University of China , Qingdao , People's Republic of China.
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.affiliation: c College of Environmental Science and Engineering , Ocean University of China , Qingdao , People's Republic of China.|d China City Environment Protection Engineering Limited Company , Wuhan , People's Republic of China.
authors.forename: Tuo
authors.initials: T
authors.lastname: Xiao
authors.affiliation: c College of Environmental Science and Engineering , Ocean University of China , Qingdao , People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.affiliation: c College of Environmental Science and Engineering , Ocean University of China , Qingdao , People's Republic of China.
authors.forename: Xueting
authors.initials: X
authors.lastname: Shao
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry*; D001557:Benzenesulfonates / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry*; D009282:Naphthalenesulfonates / Q000737:chemistry*; D010084:Oxidation-Reduction; D010545:Peroxides / Q000737:chemistry*; D059027:Recycling; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D004396:Coloring Agents; D009282:Naphthalenesulfonates; D010545:Peroxides; D014874:Water Pollutants, Chemical; C038288:peroxymonosulfate; D002244:Carbon; C063421:Remazol black B; C014722:2-naphthol orange
keywords: Reuse performance; activated carbon fiber; catalyzed peroxymonosulfate oxidation; granular-activated carbon; organic pollutant treatment