负载型γ-Al2O3三维粒子电极的制备及其对氯霉素的降解  

Degradation of chloramphenicol by supportedγ-Al_2O_3 particle electrodes

作　　者：孙永军 沈浩[1] 马骉 孙文全 朱宏博 肖雪峰[1] 徐炎华 马江雅 张鹏 朱国成[6] 马根朝[1] 

机构地区：[1]南京工业大学城市建设学院,南京211800 [2]南京工业大学环境科学与工程学院,南京211800 [3]南京工业大学江苏省工业节水减排重点实验室,南京211800 [4]安徽工业大学建筑工程学院 [5]生物膜法水质净化与利用技术教育部工程研究中心,安徽马鞍山243002 [6]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《土木建筑与环境工程》2017年第5期140-146,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(51508268);江苏省自然科学基金(BK20150951);中国博士后科学基金(2016M591835)~~

摘　　要：以γ-Al_2O_3为载体,将Ti和Sn两种元素进行负载制备负载型γ-Al_2O_3粒子电极,采用X射线衍射(XRD)、扫描电镜(SEM)、X射线荧光光谱(XRF)、红外光谱(IR)对γ-Al_2O_3和负载型γ-Al_2O_3粒子电极进行表征。研究了电解时间对三维粒子电极法电催化氧化氯霉素的影响。采用初始浓度100mg/L的CAP模拟废水,持续电解3h后,制备的粒子电极通过三维电解对CAP去除率为72.8%,对TOC去除率低于3.7%,说明负载型γ-Al_2O_3粒子电极对氯霉素矿化作用较小。三维粒子电极对氯霉素的降解过程近似符合一级动力学方程,CAP初始浓度对去除率影响较小。粒子电极电催化氧化CAP的关键因素之一为·OH,外加叔丁醇对·OH进行清洗,相同条件下,氯霉素去除率降低至30%左右,表明氯霉素的降解是由阳极氧化和·OH间接氧化两种途径协同作用的。In this paper,γ-Al2O3 was used as the carrier to screen the active ingredients.As the result,Ti and Sn were used to prepared the supportedγ-Al2O3 Particle.IR,XRD,SEM,and XRD were used tocharacterize the particle electrode.The effect of electrolysis time on the three-dimensional particle electrode electro-catalytic oxidation of chloramphenicol was studied The chloramphenicol removal rate and TOC removal rate were 72.8%and 4.2% obtained at 100mg/L chloramphenicol and 180 min,respectively.The degradation process of chloramphenicol was approximate first-order kinetics equation,and the initial concentration had less effect on the removal.·OH played a key role in particle electrodes electro-catalytic oxidation process of chloramphenicol.Adding t-butanol to clean ·OH,the removal of chloramphenicol was reduced to about 30% under the same conditions.This indicated that the degradation of the chloramphenicol was coordinated effect of directed oxidation of anode and indirected oxidation of·OH.

关 键 词：粒子电极 氯霉素 电催化 动力学 间接氧化 

分 类 号：TQ316.3[化学工程—高聚物工业]