用络合萃取法对磺酸型有机废水进行预处理的研究

采用络合萃取法对磺酸型有机废水进行预处理，研究了萃取过程中废水ＰＨ、萃取睡稀释凤加量对废水萃取效果的影响。实验结果表明，当ＰＨ为１．０时，萃取剂和稀释剂按废水；萃取剂；稀释剂＝１００：１０：２５的投加，可取得较好的效果。萃取后的络合相经碱解分离即可回收萃取剂，萃取剂循环使用１０次，废水的ＣＯＤ去除率无下降趋势。

Study on Pretreatment of Organo-Sulfonic Wastewater by Complexometric Extraction Process

The effects of pH of wastewater and the quantity of extracting agent anddiluting agent on complexometric extraction efficiency for pretreatment of organo-sulfonicwastewater have been studied.The experiment results indicate that high extraction efficiencycan be obtained under pH of 1.0 and wastewater:extracting agent:diluting agent=100:10:25.The extracting agent can be recovered by basic hydrolysis and separation of the complexphase after extraction. COD removal rate of the wastewater has not been reduced after 10time reuse of the extracting agent.