用MnSO_4作催化剂测定废水COD  

Determination of COD in wastewater by using MnSO_4 as catalyst

作　　者：张安龙[1] 吴冰华[2] 

机构地区：[1]陕西科技大学轻工与能源学院,陕西西安710021 [2]陕西科技大学资源与环境学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2013年第3期5-8,共4页Journal of Shaanxi University of Science & Technology

基　　金：十二五国家科技支撑计划项目(2011BAC11B04);陕西科技大学研究生创新基金项目

摘　　要：用硫酸锰代替硫酸银作催化剂,对密封消解法测定废水中化学需氧量的条件进行了优化.通过正交试验,对测定过程中的几种主要影响因素进行了讨论,得出了影响因素的排序:消解温度>消解时间>催化剂用量.同时,得出了本测定方法的最优操作条件为:消解温度165℃,消解时间8min,硫酸锰用量0.05g.该方法准确度和精密度同标准方法大致相同,且操作方便快捷、分析费用低,适用于批量水样的测定.Using manganese sulfate instead of silver sulfate as catalyst, a sealed digestion method was developed for determination of chemical oxygen demand（COD）. Through or- thogonal experimental design method, the paper discussed the main influencing factors on determination result of COD such as digestion temperature, digestion time and catalyst dos- age. The result shows that digestion temperature is the main influencing factor, the second is digestion time, the third is catalyst dosage. At the same time,the parameters of COD deter- mination by the sealed digestion method were optimized, and the results are as follows： di- gestion temperature is 165℃, digestion time is 8 min, catalyst dosage is 0.05 g. The accura- cy and precision of this method is basically the same as the standard method, and the sealed digestion method is simple, rapid, low-cost, and suitable for determination of bulk samples.

关 键 词：化学需氧量测定 催化剂 硫酸锰 密封消解法 正交试验设计 

分 类 号：X502[环境科学与工程—环境工程]