摘要
废水中高浓度氯离子的存在严重干扰COD的检测结果。采用标准加入法测定高氯废水中的COD值,结果表明:废水中COD/Cl-浓度比值大于1/200时,当氯离子浓度小于8 000 mg/L,加标后控制COD/Cl^(-)浓度比值大于1/20;当氯离子浓度在15 000~30 000 mg/L,加标后控制COD/Cl^(-)浓度比值大于1/15;当氯离子浓度大于50 000 mg/L,加标后控制COD/Cl-浓度比值大于1/10,测得数据可靠有效。废水中COD/Cl^(-)浓度比值小于1/200时,该方法不适用。
The existence of high concentration chloride ion in wastewater seriously interferes with the detection results of COD.In this experiment,the standard addition method was used to determine the COD value in high chlorine wastewater.The results show that the measured data are reliable and effective when the concentration ratio of COD/Cl^(-)in wastewater is greater than 1/200.In addition,when the chloride ion concentration is less than 8000 mg/L,the COD/Cl^(-)ratio shall be controlled to be greater than 1/20 after standard addition.When the chloride ion concentration is in the range of 15000~30000 mg/L,the COD/Cl^(-)ratio shall be controlled to be greater than 1/15 after standard addition.When the chloride ion concentration is greater than 50000 mg/L,the COD/Cl^(-)concentration ratio shall be controlled to be greater than 1/10 after standard addition.This method is not applicable when the concentration ratio of COD/Cl^(-)in wastewater is less than 1/200.
作者
张刚
梁开才
耿李跃
沈青山
程婷婷
ZHANG Gang;LIANG Kai-cai;GENG Li-yue;SHEN Qing-shan;CHENG Ting-ting(China Testing&Certification International Group Anhui Jingcheng Co.Ltd.,Hefei 230000,China)
出处
《安徽化工》
CAS
2023年第2期142-146,共5页
Anhui Chemical Industry
关键词
废水
氯离子
COD
标准加入法
waste water
chloride ion
COD
standard addition method
