粉煤灰催化H_2O_2氧化降解活性艳红X-3B的研究  

A Study on the Treatment of Reactive Red X-3B by Catalytic Oxidation with Catalyst PFA

作　　者：吴小平[1] 王琼生[2] 赵燕群[1] 王世铭[1] 

机构地区：[1]福建师范大学化学与化工学院,福建福州350117 [2]福建师范大学材料科学与工程学院,福建福州350117

出　　处：《福建师范大学学报（自然科学版）》2013年第2期58-63,共6页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省科技厅重大项目(2010H6006);福建省教育厅资助项目(JA09052);福州市科技局资助项目(CE0015)

摘　　要：以某地富含铁的粉煤灰为原料,经两次磁选、湿磨后制得了实验所需的催化剂PFA,采用固体X-射线荧光光谱、粉末X射线衍射及扫描电镜法对样品进行了表征.以活性艳红X-3B为目标污染物,研究H2O2用量、反应溶液pH、催化剂用量及初始质量浓度等因素在常温下对其催化降解效果的影响.结果表明,最佳催化反应条件为:X-3B初始质量浓度150 mg.L-1,PFA用量1 g.L-1,H2O2用量1 mmol.L-1,pH=3.0,反应25 min,对X-3B的去除率可达到95%.PFA是高效的非均相类Fenton催化剂,对高浓度难生物降解的偶氮染料活性艳红X-3B具有优异的催化氧化活性.PFA循环10次实验表明,催化剂重复使用效果好.Catalyst PFA has been successfully prepared using fly ash as the raw materials by magnetic separation and wet grinding. The sample was characterized by XFS, XRD, and SEM. Meanwhile reactive red X-3B was taken as the probe molecular to evaluate the catalytic activity of the PFA catalyst. The effects of concentration of H2 O2 , initial pH, the quantity of catalyst, and the initial concentration of X-3B on the degradation rate of the X-3B solution were investigated. The results showed that the PFA was efficient Fenton-like catalyst. It can effectively decompose the high concentration organic pollutants X-3B and the degradation ratio of organic pollutants in the concentration of 150 mg · L-1 reached over 95% in 25 rain when the catalyst 1.0 g · L-1 , pH =3.0. The catalytic activity did not exhibit significant loss after 10 runs, showing the good stability that can be used repeatedly and easy separation of the catalyst from the treated wastewater.

关 键 词：粉煤灰 类FENTON 催化氧化 H2O2 活性艳红 

分 类 号：O614.122[理学—无机化学]