摘要
COD是水处理工艺调节以及排放标准中重要指标。测试方法主要有重铬酸钾法、库仑法、快速密闭催化消解法(含光度法)、氯气校正法(高氯废水)。HJ828—2017《水质化学需氧量的测定:重铬酸盐法》是消解时间就需要2 h,检测效率很低。现针对实验室已有HACH 2400型速测仪,将其与重铬酸盐法进行实验对比,该速测仪在COD测定中具有检测稳定性、准确度高,并且操作方便,清洗简单,试剂消耗量少,成本低,2次污染小。
COD is an important index in water treatment process regulation and discharge standards.The main test methods are potassium dichromate method,Coulomb method,rapid closed catalytic digestion method(including photometry),chlorine gas correction method(high chlorine wastewater).HJ828-2017"determination of Chemical oxygen demand of Water quality:dichromate method"takes 2 hours for digestion,and the detection efficiency is very low.Compared with dichromate method,the HACH 2400 rapid measuring instrument has the advantages of stable detection,high accuracy,convenient operation,simple cleaning,low reagent consumption,low cost and low secondary pollution in the determination of COD.
作者
何懿伦
HE Yi-lun(Research Institute of Urumqi Branch Co.,Ltd.Urumqi 830019,China)
出处
《聚酯工业》
CAS
2021年第2期41-42,共2页
Polyester Industry
关键词
PTA污水
化学需氧量
速测仪
重铬酸盐法
PTA wastewater
chemical oxygen demand
rapid meter
dichromate method
