Mineralization of aqueous pentachlorophenolate by anodic contact glow
discharge electrolysis |
| |
Authors: | Haiming Yang and Meguru Tezuka |
| |
Institution: | 1. Graduate School of Engineering, Saitama Institute of Technology, Fusaiji, Fukaya, Saitama 369-0293, Japan;School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China 2. Graduate School of Engineering, Saitama Institute of Technology, Fusaiji, Fukaya, Saitama 369-0293, Japan |
| |
Abstract: | 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, 2,3,5,6-
tetrachloro-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. |
| |
Keywords: | pentachlorophenol mineralization contact glow discharge electrolysis first-order rate law |
本文献已被 维普 万方数据 PubMed 等数据库收录! |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
|