纳米TiO2-KMnO4光催化氧化体系快速测定COD——一个大学化学综合实验  

Determining COD by using nanometer TiO2-KMnO4 photocatalysis oxidation technology:A college chemical comprehensive experiment

作　　者：赵丽华[1] 龚时琼[1] 朱丽华[1] 杨鹏[1] 

机构地区：[1]华中科技大学化学与化工学院

出　　处：《实验技术与管理》2010年第1期34-36,共3页Experimental Technology and Management

摘　　要：化学需氧量（COD）是水质分析监测中一个很重要的指标。介绍了以纳米TiO2-KMnO4协同光催化氧化体系为基础,结合分光光度法快速测定校园内的几个湖泊水（作为样品水样）中COD的简便方法,并用重铬酸钾回流法作对比。该方法可作为仪器分析实验的综合实验,让学生掌握分光光度法,以及熟悉仪器分析与化学分析方法相结合在环境样品分析中的应用。该实验内容新颖,学生参与热情高。The chemical oxygen demand（COD） is an important parameter for water quality,and is commonly determined by potassium dichromate reflux method.The COD value got by the method is of good precision and repeatability,but it causes secondary pollution and takes a long analysis time.A nano-TiO2-KMnO4 photo catalytic oxidation system combined with spectrophotometry for rapid determination of（COD） was proposed,and applied to determine the COD of various water samples on our campus.The COD values determined by two methods were also compared.The rapid method was suitable for comprehensive experiment of instrument analysis of undergraduate course,in order to train students to master technology of ultraviolet and visible spectrophotometry and the ability of applying instrumental analysis methods and traditional chemical analysis methods comprehensively in environmental samples.

关 键 词：化学需氧量 光催化氧化 重铬酸钾回流法 仪器分析实验 

分 类 号：X830.2[环境科学与工程—环境工程] G642.423[文化科学—高等教育学]