常温铁氧体法处理低浓度重金属废水的研究

Research on the Treatment of Low Concentration of Heavy Metal Wastewater by Ambient Temperature Ferrite Process

针对某冶炼厂产生的大量低浓度重金属废水,常规方法处理存在成本高、废渣二次污染等问题。试验采用常温中和铁氧体处理低浓度重金属废水,最佳工艺条件为:[Fe^(3+)]∶[Fe^(2+)]=2,pH=9,[Fe^(2+)]∶[Pb^(2+)、Cd^(2+)、As^(3+)、As^(5+)]=10,温度20℃,搅拌时间30 min,砷、镉、铅去除率分别为96.73%、97.56%、98.43%。

Problems of high cost and waste residue secondary pollution exist in conventional process which treated at numbers of low concentration of heavy metal wastewater in a smelting plant. By ambient temperature ferrite process, removal rate of As,Cd,Pb is 96.73% ,97.56% and 98.43% respectively on the best conditions of[ Fe^3＋ ]： [ Fe^2＋ ] for 2, pH for 9, [ Fe^2 ＋ ] ： [ Pb^2 ＋ , Cd^2 ＋ , As^3＋ , As5＋] for 10, temperature for 20 ℃ and mixing time for 30 min.