Abstract:

Considerable attention has been paid to the study of high standard on the wastewater treatment by zero-valence iron internal electrolysis. Therefore，systematic studies on how to avoid and reduce the deviation from the determination of COD are crucial.In this work，the effects of pH and lay-time of internal electrolysis on COD are investigated，based on the changes of the experimental conditions for the treatment of wastewater from dye-stuff production and their mechanisms are discussed.Moreover，the method for avoiding or reducing the deviations of the determination values by using internal electrolysis for treating blank samples is proposed.

Key words: zero-valence iron internal electrolysis, determination of COD, dye wastewater

摘要：

目前,关于零价铁-内电解处理废水技术的研究相当广泛,因此系统地研究在这一工艺过程中如何避免和减小测定COD时由亚铁离子带来的测定偏差就显得至关重要.作者根据内电解处理染料废水实验条件的变化,探讨了内电解过程中的pH、水样放置时间对COD等指标测定的影响及机理,并且提出了采用内电解处理空白样的方法来避免或减小COD测定偏差.

关键词: 零价铁-内电解, COD测定, 染料废水

CLC Number: 

• X703