UV/Fenton光催化氧化降解对氯苯酚废水反应动力学

Kinetic studies of p-chlorphenol wastewater treatment by UV/Fenton oxidation

研究了UV Fenton体系降解对氯苯酚废水的过程及动力学 .研究表明 ,反应降解速率主要与双氧水加入量、污染物初始浓度、亚铁离子浓度、pH值及载气种类有关 .在四分之一双氧水理论投加量的情况下 ,通入氧气 ,总酚的降解率可达到 98% ,CODcr去除率 80 %以上 .反应体系通入氧气 ,可显著提高污染物的去除率 .建立了CODcrUV Fenton降解的动力学模型 ,结果表明 ,该速率方程和实验数据拟合较好 .

The photodegradation of p-chlorphenol in a photo-Fenton process was investigated. The reaction was affected by initial concentration of p-chlorphenol, ferrous ion and H_2O_2 added, initial pH, as well as carrier gas. With the aid of oxygen aeration, the removal of phenol and COD_(cr) were reached about 98% and 80% respectively when initial concentration of H_2O_2 added was a quarter of stoichiometric calculated quantities. A kinetic model was adopted to describe the reaction and the rate equation could provide the evidence for the main reaction pathway, which was fitted very well with the experiment data.