Abstract:

Experimental studies on the treatment of wastewater containing nitrobenzene by fixed phase complexing extractant have been carried out. In the experiments，the influences of the mass ratio of complexing extractant to macro porous resin，the initial pH of wastewater， flow of wastewater，and the method of recycle have been examined. The pilot study of acetyl naphthalene wastewater treatment application is done. The results show that when the mass ratio of complexing extractant to macro porous resin is 2 ∶1 and initial pH < 7 of wastewater， the complexing extractant can effectively extract nitrobenzene from wastewater，and can be regenerated by vapor. The concentration of nitrobenzene and COD_Cr of acetyl naphthalene wastewater can be reduced to the level lower than the First Grade National Discharge Standard by using the technique of three-stage fixed bed complexing extraction.

Key words: complexing extractant, nitrobenzene, acetyl naphthalene wastewater

摘要：

采用固定相络合萃取技术回收处理废水中硝基苯。考察了络合萃取剂组成比、废水起始pH、流速、再生方法等对络合萃取硝基苯性能的影响，探讨了萘乙酮生产废水的处理工艺。结果表明，当络合萃取剂与大孔树脂质量比为2∶1,废水pH<7时，自制的络合萃取剂能有效处理废水中的硝基苯，并可通过蒸汽气提法再生；采用三级固定床络合萃取工艺能使萘乙酮生产废水出水硝基苯和COD_Cr浓度达到国家一级排放标准。

关键词: 络合萃取剂, 硝基苯, 萘乙酮生产废水

CLC Number: 

• X703.1