Chlorine dioxide catalytic oxidation and online FTIR spectroscopic analysis of simulated o-chlorophenol wastewater
作者:Laishun Shi、Xiaomei Wang、Na Li、Chunlei Huai、Jie Liu
DOI:10.1007/s11164-012-0502-4
日期:2012.10
An activated carbon-MnO2 catalyst was prepared and used for chlorine dioxide catalytic oxidation of simulated o-chlorophenol wastewater. The COD removal efficiencies of chemical oxidation and catalytic oxidation are 28.6 and 93.5%, respectively. The COD removal efficiency of catalytic oxidation is greater than that of chemical oxidation at the same treatment condition. By using UV–Vis and online FTIR analysis technique, the intermediates during the degradation process were obtained. The benzene ring in o-chlorophenol was degraded into quinone and carboxylic acid, and finally changed into carbon dioxide and water during the catalytic oxidation. The degradation reaction mechanism of o-chlorophenol by chlorine dioxide catalytic oxidation was proposed based upon the experiment evidence.
制备了一种活性炭-MnO2 催化剂,并将其用于模拟邻氯苯酚废水的二氧化氯催化氧化。化学氧化和催化氧化对 COD 的去除率分别为 28.6%和 93.5%。在相同处理条件下,催化氧化法的 COD 去除率高于化学氧化法。利用紫外可见光和在线傅立叶变换红外分析技术,获得了降解过程中的中间产物。在催化氧化过程中,邻氯苯酚中的苯环被降解成醌和羧酸,最后变成二氧化碳和水。根据实验证据,提出了二氧化氯催化氧化邻氯苯酚的降解反应机理。