摘要
采用络合萃取法，以ＴＯＡ为萃取剂、煤油为稀释剂处理对硝基苯酚生产废水。当萃取剂浓度为７－５％（ 油相） 、相比１∶１－５、萃取时间２０ ｍｉｎ 时，废水经一级萃取硝基苯酚去除率达９９－０％ ，ＣＯＤ去除率达９４－０％ 。萃取所得络合相经ＮａＯＨ解络后，上层油相为萃取剂可循环使用，下层为浓缩的对硝基苯酚，可回收利用。
A complex extraction method for treating para_nitrophenol (PNP) wastewater was presented by use of trioctyl amine (TOA) as extraction solvent and kerosene as diluent.The experiment results show that the PNP removal rate is 99.0 % and the COD removal rate is 94.0 % by one stage extraction under the following optimum conditions:extraction solvent concentration of 7.5 % (oil phase), phase ratio of 1∶1.5 and extraction time of 20 minutes.The used extraction solvent can be recycled and the enriched PNP can be reclaimed after stripping by adding NaOH into the complex phase.
出处
《工业用水与废水》
CAS
1999年第4期18-19,共2页
Industrial Water & Wastewater
关键词
对硝基苯酚
络合萃取
废水处理
para_nitrophenol (PNP)
complex extraction
trioctyl amine (TOA)
wastewater treatment
