形稳阳极Ti/IrO_2-Ta_2O_5电Fenton法催化降解含酚废水  

Degradation of Phenol Wastewater by Electro-Fenton Method with Dimensionally Stable Anode of Ti/IrO_2-Ta_2O_5

作　　者：高璟[1,2] 闫俊娟 刘有智[1,2] 郭志远 管张斌 GAO Jing YAN Jun-juan UU You-zhi GUO Zhi-yuan GUAN Zhang-bin(Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051 , China School of Chemical and Environmental Engineering, Taiyuan 030051 , China)

机构地区：[1]中北大学超重力化工过程山西省重点实验室,山西太原030051 [2]中北大学化工与环境学院,山西太原030051

出　　处：《含能材料》2017年第10期866-872,共7页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(21376229);山西省青年科技研究基金(2015021033)

摘　　要：针对电芬顿(Fenton)降解含酚废水时,铁阳极Fe易溶解从而影响降解效率的问题,采用形稳阳极Ti/IrO_2-Ta_2O_5进行电Fenton降解含酚废水的研究。采用高效液相去谱法推测了Ti/IrO_2-Ta_2O_5阳极和Fe阳极电Fenton降解苯酚的中间产物和降解过程。结果表明,FeSO_4·7H_2O投加量0.1 g·L^(-1),H_2O_2投加量2.94 mmol·L^(-1),初始pH值3.5,电压5.0 V,降解时间2 min,苯酚和化学需氧量(COD)去除率分别达94.14%和40.74%。在相同初始pH值、电压和降解时间下,使用铁阳极,苯酚和COD的去除率分别为40.74%和26.41%。相比Fe阳极电Fenton过程,Ti/IrO_2-Ta_2O_5阳极电Fenton过程降解废水时具有H_2O_2投加量少、降解时间短、电解电压低,并且耗酸量少、处理效果好、电极不易溶解的优点。Ti/IrO_2-Ta_2O_5阳极和Fe阳极电Fenton降解苯酚的过程是相同的,但在相同降解时间内,Ti/IrO_2-Ta_2O_5阳极电Fenton法降解含酚废水效率较高,这是由于Ti/IrO_2-Ta_2O_5阳极电催化反应与Fenton反应形成协同效应,协同降解废水的效率大于单独Fe阳极Fenton反应降解废水的效率。Aiming at the problem that in the degradation of phenol wastewater by Electro-Fenton, Fe of Fe anode is easily dis- solved, which affects the degradation efficiency, the study on the degradation of phenol wastewater by Electro-Fenton was carried out using ghe dimensionally stable anode of Ti/IrO2-Ta2O5. The degradation intermediate products and degradation process of phenol wastewater of Ti/IrO2-Ta2O5 anode and Fe anode for Fenton degradation of phenol were detected by high performance liq- uid chromatography（HPLC）. Results show that when FeSO4 · 7H2O dosage is0.1 g. L-1, H2O2 dosage is 2.94 mmoL · L-1, ini- tial pH is 3.5, voltage is 5 V and degradation time is 2 min, by using Ti/IrO2-Ta2O5 anode, the removal efficiency of phenol and COD can reach 94.14% and 40.74%, respectively. When Fe anode is used, at the same initial pH, voltage and degradation time, the removal efficiencies of phenol and COD are 40.74% and 26.41%, respectively. Compared with the Electro-Fenton process of Fe anode, the Electro-Fenton method of Ti/lrO2-Ta2O5 anode has the advantages of less acid consumption, less H2O2 dosage, shorter reaction time, lower electrolysis votage, lower consumption of electrode and better treatment effect for degradating phenol wastewater. The degradation process of phenol wastewater of Ti/IrO2-Ta20s anode and Fe anode for Fenton degradation of phenol are the same, but the degradation efficiency of phenol wastewater by Electro-Fenton method with Ti/IrO2-Ta2O5 anode is higher in the same degradation time. This is because the electrocatalysis reaction using Ti/lrO2-Ta2O5 anod and Electro-Fenton reaction can form a synergisic effect, the synergistic degradation of wastewater is more than that of alone Electro-Fenton reaction using Fe anode.

关 键 词：Ti/IrO2-Ta2O5 电芬顿(Fenton) 电解 催化 含酚废水 

分 类 号：X703[环境科学与工程—环境工程]