环氧丙烷废水COD测定方法研究  

A study of determination method for epoxypropane wastewater COD

作　　者：刘鹏 王强 张岩 李京京 徐军 王开春 李智超 HU Peng;WANG Qiang;ZHANG Yan;H Jing-jing;XU Jun;WANG Kai-chun;LI Zhi-chao(Hangjin Technology Co.,Ltd.,Huludao 125001,China;China Bluestar Lehigh Engineering Corp.,Lianyungang 222004,China)

机构地区：[1]航锦科技股份有限公司,辽宁葫芦岛125001 [2]中蓝连海设计研究院有限公司,江苏连云港222004

出　　处：《工业用水与废水》2018年第3期81-84,共4页Industrial Water & Wastewater

摘　　要：环氧丙烷废水COD质量浓度在100 mg/L以下时,采用HJ/T 70—2001《高氯废水化学需氧量的测定氯气校正法》测定会产生较大偏差。通过改进氯气校正法,采用0.025 mol/L重铬酸钾,并以相近Cl-浓度的空白盐水作为空白值进行扣除,来测定环氧丙烷废水COD浓度,相对偏差小于2%,COD平均回收率为96.9%~102.2%,测定结果准确可靠。Using HJ/T 70—2001 Determination of Chemical Oxygen Demand in High Chlorine WastewaterChlorine Correction Method to determine epoxypropane wastewater with COD mass concentration below 100 mg/L may produce great deviation. The COD concentration of epoxypropane wastewater was determined by modifying chlorine correction method using 0.025 mol/L potassium dichromate, and using blank brine with similar Clconcentration as a blank value, the relative deviation was less than 2%. The average recovery rate of COD was96.9%-102.2%, the measurement result was accurate and reliable.

关 键 词：环氧丙烷废水 COD测定 氯离子干扰 含氯空白 

分 类 号：X703.1[环境科学与工程—环境工程]