高氯低COD废水中COD测定的研究及标准方法对比分析  

Study on Determination of COD in Wastewater With High Chlorine and Low COD and Comparative Analysis of Standard Methods

作　　者：于子千 Yu Ziqian(PetroChina Yunnan Petrochemical Co.Ltd.,Yunnan,163000,China)

机构地区：[1]中石油云南石化有限公司,云南昆明650000

出　　处：《石油化工自动化》2022年第5期64-67,共4页Automation in Petro-chemical Industry

摘　　要：以氯离子质量浓度在1~2g/L,COD值在0~100mg/L的水样为研究对象,通过对重铬酸钾法、快速消解法和氯气校正法的比较分析,证明了快速消解法及重铬酸钾法均能满足质量控制要求,快速消解法具有操作简便,安全性好,分析周期短、产生有毒废液较少、分析结果准确度较高等特点,适合大批量水样分析,可用于监督监测突发性污染事故,应急监测等。重铬酸钾法为国标法,虽用时较长,但准确性可以满足质量要求,因此针对企业外排口等还需选择该方法。Taking the water samples with chloride ion content of 1~2 g/L and COD content of 0~100 mg/L as the research object, through the comparative analysis of potassium dichromate method, rapid digestion method and chlorine correction method, it is proved that the rapid digestion method and potassium dichromate method can meet the requirements of quality control, and the rapid digestion method has the characteristics of simple operation, good safety, short analysis cycle, less toxic waste liquid generation and high accuracy of analysis results. It is suitable for mass sample analysis and can be used for supervision and monitoring of sudden pollution accidents, emergency monitoring, etc. Potassium dichromate method is a national standard method. Although it takes a long time, its accuracy can meet the quality requirements. Therefore, the method needs to be selected for the outlet draining of enterprises.

关 键 词：化学需氧量 重铬酸钾法 快速消解法 氯气校正法 

分 类 号：X832[环境科学与工程—环境工程]