title: Perchloroethylene (PCE) oxidation by percarbonate in Fe(2+)-catalyzed aqueous solution: PCE performance and its removal mechanism.
abstract: The performance of Fe(2+)-catalyzed sodium percarbonate (SPC) stimulating the oxidation of perchloroethylene (PCE) in groundwater remediation was investigated. The experimental results showed that PCE could be completely oxidized in 5 min at 20 °C with a Fe(2+)/SPC/PCE molar ratio of 8/8/1, indicating the effectiveness of Fe(2+)-catalyzed SPC oxidation for PCE degradation. Fe(2+)-catalyzed SPC oxidation was suitable for the nearly neutral pH condition, which was superior to the conventional Fenton oxidation in acidic condition. In addition, the investigations by using hydroxyl radical scavengers and free radical probe compounds elucidated that PCE was degraded mainly by hydroxyl radical (HO) oxidation in Fe(2+)/SPC system. In conclusion, Fe(2+)-catalyzed SPC oxidation is a highly promising technique for PCE-contaminated groundwater remediation, but more complex constituents in groundwater should be carefully considered for its practical application.
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Zhouwei
authors.initials: Z
authors.lastname: Miao
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Gu
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China. Electronic address: lvshuguang@ecust.edu.cn.
authors.forename: Shuguang
authors.initials: S
authors.lastname: Lu
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Xuke
authors.initials: X
authors.lastname: Zang
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Xiaoliang
authors.initials: X
authors.lastname: Wu
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Minhui
authors.initials: M
authors.lastname: Xu
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Landry Biyoghe Bi
authors.initials: LBB
authors.lastname: Ndong
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Zhaofu
authors.initials: Z
authors.lastname: Qiu
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Sui
authors.affiliation: Department of Civil Engineering and Construction Management, Georgia Southern University, Statesboro, GA 30460, USA.
authors.forename: George Yuzhu
authors.initials: GY
authors.lastname: Fu
mesh_terms: D002254:Carbonates / Q000737:chemistry*; D002384:Catalysis; D060587:Groundwater / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D017665:Hydroxyl Radical / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D013750:Tetrachloroethylene / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D002254:Carbonates; D014874:Water Pollutants, Chemical; D017665:Hydroxyl Radical; D007501:Iron; D013750:Tetrachloroethylene; C034738:sodium percarbonate
keywords: Fe(2+)-catalyzed oxidation; Groundwater remediation; Hydroxyl radical (HO()); Percarbonate; Perchloroethylene (PCE)