title: Wire-cylinder dielectric barrier discharge induced degradation of aqueous atrazine.
abstract: The wire-cylinder dielectric barrier discharge reactor was adopted for removal of aqueous atrazine. The effect of different parameters on the degradation efficiency of atrazine was investigated, and the degradation mechanism of atrazine was studied. The experimental results showed that when the discharge power was 50 W and the air flow rate was 140 L h(-1), 93.7% of atrazine was degraded after 18 min of discharge time. The concentrations of generated O3 and H2O2 increased with increasing discharge time. The pH decreased from 6.80 to 2.50, 12.7% of TOC was removed after 18 min. The concentrations of generated Cl(-) and NO3(-) increased significantly during the degradation process of atrazine, and the decreasing toxicity trend was observed for the treated atrazine solution. The degradation byproducts of atrazine were identified using liquid chromatography-time-of-flight mass spectrometry (LC-TOF-MS), which might be formed mainly in dechlorination hydroxylation, alkyl oxidation, dechlorination hydroxylation combined with alkyl oxidation and demethylation oxidation reactions.
authors.affiliation: School of Civil Engineering, Hefei University of Technology, Hefei 230009, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Zhu
authors.affiliation: School of Civil Engineering, Hefei University of Technology, Hefei 230009, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Jiang
authors.affiliation: School of Civil Engineering, Hefei University of Technology, Hefei 230009, China.
authors.forename: Run-Long
authors.initials: RL
authors.lastname: Liu
authors.affiliation: School of Civil Engineering, Hefei University of Technology, Hefei 230009, China.
authors.forename: Pei
authors.initials: P
authors.lastname: Chen
authors.affiliation: School of Civil Engineering, Hefei University of Technology, Hefei 230009, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Lang
authors.affiliation: School of Civil Engineering, Hefei University of Technology, Hefei 230009, China; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China. Electronic address: jingweifeng@hfut.edu.cn.
authors.forename: Jing-Wei
authors.initials: JW
authors.lastname: Feng
authors.affiliation: School of Civil Engineering, Hefei University of Technology, Hefei 230009, China. Electronic address: sjyuan@hfut.edu.cn.
authors.forename: Shou-Jun
authors.initials: SJ
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China.
authors.forename: Da-Yong
authors.initials: DY
authors.lastname: Zhao
mesh_terms: D001280:Atrazine / Q000737:chemistry*; D002853:Chromatography, Liquid; D006540:Herbicides / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D013058:Mass Spectrometry; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry; D058626:Plasma Gases / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D006540:Herbicides; D058626:Plasma Gases; D014874:Water Pollutants, Chemical; D010126:Ozone; D006861:Hydrogen Peroxide; D001280:Atrazine
keywords: Atrazine; Degradation intermediates; Degradation pathways; Dielectric barrier discharge