| 第 49 卷第 4 期 |  | Vol. 49 No. 4 | | 2019 年 8 月 | Aug 2019 |
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所属栏目：安全与环保
TiO2-SiO2／GAC粒子电极的制备及其对氨氮废水去除的探究 |
| 张 娜1，朱忻怡1，栗崇峻1，万 佳1，孟 勇1，2*，彭 馨2
（1. 湖南师范大学 化学与化学工程学院，湖南 长沙 410081；2. 新材料与资源精细利用国家与地方联合工程实验室，湖南 长沙 410081） |
| 摘 要：采用溶胶-凝胶法制备TiO2-SiO2／GAC粒子电极，通过SEM、XRD和N2吸附-脱附对负载前后的活性炭粒子电极进行表征。通过紫外-可见分光光度法，比较二维和三维电催化体系中羟基自由基（·OH）的瞬时浓度大小。以氨氮废水为目标污染物进行三维电催化氧化降解实验，考察了初始pH值和槽电压对氨氮降解效率的影响。结果表明，在初始pH值为10，槽电压为10 V条件下，氨氮降解效率为91.89%。 |
| 关键词：粒子活性炭；羟基自由基；三维电催化氧化；氨氮废水 |
| 中图分类号：X703 文献标识码：A 文章编号：1009-9212（2019）04-0064-06 |
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| Preparation of TiO2-SiO2/GAC Particle Electrodes and Its Degradation Mechanism of NH3-N Wastewater |
| ZHANG Na1, ZHU Xin-yi1, LI Chong-jun1, WAN Jia1, MENG Yong1,2*, PENG Xin2
(1. College of Chemistry and Chemical Engineering of Hunan Normal University Changsha 410081, China; 2. New Petro-chemical Materials and Fine Utilization of Resources, Changsha 410081, China) |
| Abstract：TiO2-SiO2-Activated carbon particle electrodes have been prepared by sol-gel method, and the activated carbon before and after loading TiO2-SiO2 is characterized by SEM, XRD and N2 adsorption-desorption. The instantaneous concentration of ·OH produced by the activated carbon particle electrode in the two-dimensional electrode method and three-dimensional electrode method have compared by UV-Vis. The three-dimensional electro-catalytic oxidation degradation experiment for target pollutant NH3-N wastewater have been studied, and the effects of initial pH and cell voltage on the degradation efficiency of NH3-N investigated. The results show that the NH3-N degradation efficiency reaches 91.89% under the condition of initial pH value of 10 and cell voltage of 10 V. |
| Key words：granular activated carbon; hydroxyl radical; three-dimensional electro-catalytic oxidation; NH3-N wastewater |
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基金项目：湖南省大学生研究性学习和创新性实验计划项目（201810542038）。
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作者简介：张 娜（1993-），女，河南周口人，硕士研究生，研究方向：电催化氧化降解氨氮废水（E-mail：976683282@qq.com）
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联 系 人：孟 勇，副教授，博士，研究方向：污水处理（E-mail：mengyong76@163.com）
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收稿日期：2019-08-10
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