Mineralization of aqueous pentachlorophenolate by anodic contact glow discharge electrolysis  

作　　者：Haiming Yang Meguru Tezuka 

机构地区：[1]Graduate School of Engineering, Saitama Institute of Technology, Fusaiji, Fukaya, Saitama 369-0293, Japan [2]School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China

出　　处：《Journal of Environmental Sciences》2011年第6期1044-1049,共6页环境科学学报（英文版）

基　　金：support from "Open Research Center" Projects for Private Universities:matching fund subsidy from Ministry of Education,Culture,Sports,Science and Technology,2007-2011

摘　　要：Exhaustive mineralization of pentachlorophenolate ion（PCP） in phosphate buffer was carried out using anodic contact glow discharge electrolysis（CGDE）,in which plasma was sustained between the electrolyte and anode.During CGDE,PCP degraded smoothly.The amount of total organic carbon decreased significantly,indicating the eventual conversion of the carbon atoms of benzene nucleus to inorganic carbons.Furthermore,chlorine atoms in PCP were liberated as chloride ions.As a primary intermediate product,2,3,5,6tetrachloro-1,4-benzoquinone was detected,and oxalate and formate as byproducts were also found.It was revealed that disappearance of PCP obeyed first-order kinetics.The reaction rate was generally unaffected by both O2 and inert gases in the cell,although it decreased by raising initial pH of solution.In addition,a plausible reaction pathway involving hydroxyl radical was proposed.Exhaustive mineralization of pentachlorophenolate ion（PCP） in phosphate buffer was carried out using anodic contact glow discharge electrolysis（CGDE）,in which plasma was sustained between the electrolyte and anode.During CGDE,PCP degraded smoothly.The amount of total organic carbon decreased significantly,indicating the eventual conversion of the carbon atoms of benzene nucleus to inorganic carbons.Furthermore,chlorine atoms in PCP were liberated as chloride ions.As a primary intermediate product,2,3,5,6tetrachloro-1,4-benzoquinone was detected,and oxalate and formate as byproducts were also found.It was revealed that disappearance of PCP obeyed first-order kinetics.The reaction rate was generally unaffected by both O2 and inert gases in the cell,although it decreased by raising initial pH of solution.In addition,a plausible reaction pathway involving hydroxyl radical was proposed.

关 键 词：PENTACHLOROPHENOL MINERALIZATION contact glow discharge electrolysis first-order rate law 

分 类 号：O642.43[理学—物理化学] X703[理学—化学]