title: Degradation of TAIC by water falling film dielectric barrier discharge--influence of radical scavengers.
abstract: This work describes the application of plasma generated by water falling film dielectric barrier discharge for the degradation of triallyl isocyanurate (TAIC). The results indicated that TAIC solution of 1000mg/L was effectively removed within 60min treatment at 120W output power. Six intermediates were identified and a possible evolution of the TAIC degradation process was continuously proposed basing on the results of mass spectrum analysis. The effects of metal ions and radical scavengers were investigated. Results showed that whatever hydrogen radical scavengers (carbon tetrachloride, perfluorooctane) or hydroxyl radical scavengers (iso-propyl alcohol, tert-butyl alcohol) all could further enhance the degradation processes, and both kings of radical scavengers could promote the generation of H2O2. In the present study, we employed a novel method by introducing the mixed additives of Fe(2+) and radical scavengers into the plasma. It was found that the reaction rate constant and energy efficiency were improved by 309.2% and 387.8%, respectively. Among the mixed additives, Fe(2+) could promote the decomposition and increase the oxidizing power of H2O2, which is generated from the plasma discharge and greatly enhanced by the radical scavengers.
authors: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
authors: Shaopeng
authors: S
authors: Rong
authors: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China. Electronic address: sybnju@163.com.
authors: Yabing
authors: Y
authors: Sun
mesh_terms: D019840:2-Propanol / Q000737:chemistry; D002251:Carbon Tetrachloride / Q000737:chemistry; D004563:Electrochemistry; D005466:Fluorocarbons / Q000737:chemistry; D016166:Free Radical Scavengers / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D017665:Hydroxyl Radical / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D014227:Triazines / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D020002:tert-Butyl Alcohol / Q000737:chemistry
chemical_list: D005466:Fluorocarbons; D016166:Free Radical Scavengers; D014227:Triazines; D014874:Water Pollutants, Chemical; D014867:Water; C480124:1,3,5-triallyl isocyanurate; D017665:Hydroxyl Radical; C073608:perfluorooctane; D006861:Hydrogen Peroxide; D002251:Carbon Tetrachloride; D007501:Iron; D020002:tert-Butyl Alcohol; D019840:2-Propanol
keywords: Degradation efficiency; Energy efficiency; Plasma discharge; Radical scavengers; TAIC