微波协同Pt/树脂催化氧化处理甲基橙模拟废水  

Microwave Assisted Catalytic Oxidation of Methyl Orange in Aqueous Solution by Using Pt/Resin Catalyst

作　　者：徐东彦[1] 卢启增[1] 戴萍 李美兰[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042 [2]青岛科技大学机电工程学院,山东青岛266061

出　　处：《高校化学工程学报》2014年第1期195-200,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：山东省自然科学基金资助项目(ZR2012EEM029);山东省优秀中青年科学家科研奖励基金(BS2009CL004)

摘　　要：以强碱性阴离子交换树脂为载体,采用离子交换法将[PtCl6]2–负载到高分子载体上,用硼氢化钠原位还原得到Pt/树脂催化剂。在微波辅照下,将制备的催化剂应用于催化氧化处理甲基橙模拟染料废水并考察其催化性能。利用扫描电镜和红外光谱对反应前后的Pt/树脂催化材料进行表征。结果发现:Pt/树脂催化剂对模拟废水中甲基橙的物理吸附对其脱除效率几乎没有影响。在微波协同作用下,Pt/树脂对催化甲基橙降解有良好活性。加入H2O2可以在一定程度上促进甲基橙降解。对于初始浓度为50 mg·L-1的模拟废水,最佳的处理工艺条件为:微波辐照功率700 W,辐照时间7 min,催化剂加入量6 g·L-1,H2O2浓度150 mg·L-1。催化剂连续使用5次后仍维持较高的活性。The catalyst containing platinum was prepared by using ion exchange to load the [PtCl6]2-onto strong basic ion exchange resin and followed by in-situ reduction with NaBH4. The catalyst samples before and after reaction were characterized with Scanning Electron Microscope/Energy Dispersive Spectroscopy （SEM/EDS） and Fourier Transform Infrared （FT-IR） spectroscopy. The catalyst was applied in the microwave-assisted catalytic oxidation process for degradation of methyl orange, and its performance was mainly investigated. The results show that the physical adsorption of methyl orange on the surface of Pt/resin catalyst has nearly no effect on its removal efficiency. With the assistant of microwave the Pt/resin catalyst shows high catalytic performance for degradation of methyl orange. Addition of H2O2 to the microwave assisted system can improve the methyl orange degradation ability over the Pt / resin catalyst to some degree. The optimal treatment conditions for degradation of methyl orange with an initial concentration of 50 mg·L-1 are microwave power of 700 W, irradiation time of 7 min, catalyst dosage of 6 g·L-1 and H2O2 concentration of 150 mg·L-1. The catalyst can be reused 5 times and still remains a stable activity.

关 键 词：微波 催化氧化 树脂 甲基橙 废水 

分 类 号：X703[环境科学与工程—环境工程]