TiO2-SiO2/GAC粒子电极的制备及其对氨氮废水去除的探究  

Preparation of TiO2-SiO2/GAC Particle Electrodes and Its Degradation Mechanism of NH3-N Wastewater

作　　者：张娜[1] 朱忻怡 栗崇峻 万佳 孟勇[1,2] 彭馨 ZHANG Na;ZHU Xin-yi;LI Chong-jun;WAN Jia;MENG Yong;PENG Xin(College of Chemistry and Chemical Engineering of Hunan Normal University Changsha 410081, China;New Petro-chemical Materials and Fine Utilization of Resources, Changsha 410081, China)

机构地区：[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

出　　处：《精细化工中间体》2019年第4期64-69,共6页Fine Chemical Intermediates

基　　金：湖南省大学生研究性学习和创新性实验计划项目(201810542038)

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10V条件下,氨氮降解效率为91.89%.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.

关 键 词：粒子活性炭 羟基自由基 三维电催化氧化 氨氮废水 

分 类 号：X703[环境科学与工程—环境工程]