碳基含铁催化剂催化过氧化氢氧化去除对氯苯酚的试验研究

为了考察自研发的一种低成本、制作简便的碳基含铁新型催化剂(简称HACO-P型)的催化氧化性能,以对氯苯酚(4-CP)为对象,研究其催化H2O2降解水中4-CP的效果及影响因素。对HACO-P进行形貌表征,结果表明其表面多孔、具有巨大比表面积。单独考察了HACO-P对4-CP的吸附性能并进行了等温线拟合,发现其最大吸附容量为200 mg/g;在吸附已达平衡的基础上考察了催化剂投加量、 H2O2投加浓度、 pH值等因素对催化氧化去除4-CP的影响,结果表明pH值是决定催化氧化反应速率的关键因素,当pH值小于4.0时,HACO-P催化H2O2体系可在30 min时间内将4-CP完全转化,4 h内总有机碳去除率可达到60%;提高HACO-P催化剂投加量及H2O2投加浓度均能在一定程度上提高4-CP的转化率。

Degradation of 4-chlorophenol by carbon-based iron-containing catalyst catalyzed HO oxidation

In order to investigate the catalytic oxidation performance of a novel self-developed iron-containing catalyst(HACO-P type) which characterized by low cost and easy preparation, with 4-chlorophenol(4-CP) as the object, the effect of the said catalyst catalyzing H2O2 to degrade 4-CP in water, as well as the influencing factors, were studied. The morphology of HACO-P was characterized, which showed that, its surface was porous and had a large specific surface area. The adsorption performance of HACO-P for 4-CP was investigated separately and then, isotherm was fitted, it was found that the maximum adsorption capacity was 200 mg/g. On the basis of equilibrium adsorption, the effects of catalyst dosage, H2O2 concentration, pH value and some other factors on 4-CP removal in catalytic oxidation were investigated. The results showed that, pH value was the key factor determining the catalytic oxidation reaction rate, when the pH value was lower than 4.0, the system of H2O2 catalyzed by HACO-P could completely transform 4-CP within 30 min, and the total organic carbon removal rate could reach 60% within 4 h. In addition, the conversion rate of 4-CP could be improved to some extent by increasing HACO-P dosage and H2O2 concentration.