双水相萃取法分离生活污水中重金属离子和机理研究

Study on Extraction Separation of Heavy Metal Ions in Wastewater with Visible Spetrophotometry

研究了生活污水中铅(Ⅱ)、铁(Ⅲ)、铬(Ⅲ)、锰(Ⅱ)等金属离子在聚乙二醇(PEG)-Na2SO4-邻苯二酚紫(PV)体系中的萃取行为。探讨了萃取酸度、萃取剂用量、硫酸铵浓度对金属离子萃取率的影响。实验结果表明,通过控制一定的条件,可以实现铬(Ⅲ)、铅(Ⅱ)与部分混合金属离子之间的萃取分离。

The distribution behavior of the two alternates of Pb（II）, Fe（III）, Cr（III）, Mn（II） metal ion in sewage in the polyethylene glycoI（PEG）-（（NH4）2SO4）- pyrocatechol violet （PV） system was studied. The effect of the solution acidity, the amount of the extractant and the （NH4）2SO4 concentration on the degree of extraction rate of metal ions was investigated. Through the control of certain conditions, extraction and separation of the Cr（III）, Pb（II） and part of the mix between metal ions was realized.