title: Adsorption and regenerative oxidation of trichlorophenol with synthetic zeolite: Ozone dosage and its influence on adsorption performance.
abstract: Regeneration of loaded adsorbents is a key step for the sustainability of an adsorption process. In this study, ozone was applied to regenerate a synthetic zeolite for the adsorption of trichlorophenol (TCP) as an organic model pollutant. Three initial concentrations of TCP in water phase were used in adsorption tests. After the equilibrium, zeolite loaded different amounts of TCP was dried and then regenerated with ozone gas. It was found that the adsorption capacity of zeolite was increased through three regeneration cycles. However, the adsorption kinetics was compromised after the regeneration with slightly declined 2nd order reaction constants. The ozone demand for the regeneration was highly dependent on the TCP mass loaded onto the zeolite. It was estimated that the mass ratio of ozone to TCP was 1.2 ± 0.3 g O3/g TCP.
authors.affiliation: College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211800, PR China; TechnischeUniversität Berlin, Department of Environmental Technology, Chair of Environmental Process Engineering, Secr. KF 2, Straße des 17. Juni 135, 10623 Berlin, Germany. Electronic address: yongjunzh@gmail.com.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: TechnischeUniversität Berlin, Department of Environmental Technology, Chair of Environmental Process Engineering, Secr. KF 2, Straße des 17. Juni 135, 10623 Berlin, Germany.
authors.forename: Bastien
authors.initials: B
authors.lastname: Prigent
authors.affiliation: TechnischeUniversität Berlin, Department of Environmental Technology, Chair of Environmental Process Engineering, Secr. KF 2, Straße des 17. Juni 135, 10623 Berlin, Germany.
authors.forename: Sven-Uwe
authors.initials: SU
authors.lastname: Geißen
mesh_terms: D000327:Adsorption; D002733:Chlorophenols / Q000737:chemistry* / Q000302:isolation & purification; D007700:Kinetics; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D059027:Recycling; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification; D018508:Water Purification; D017641:Zeolites / Q000737:chemistry*
chemical_list: D002733:Chlorophenols; D014874:Water Pollutants, Chemical; D017641:Zeolites; D010126:Ozone; C024564:2,4,6-trichlorophenol
keywords: Adsorbent regeneration; Chlorophenol; Desorption; Oxidation; Ozonation