Abstract:

Polysilicate ferric magnesium flocculant（PMFS） has been prepared by introducing magnesium compound and ferric to poly-silicic acid simultaneously.It is applied to the study on the decolorization efficiency of dyeing wastewater treatment.Its flocculation capacity and stability are influenced by the concentration of SiO₂,n（Si）∶ n（M）,n（Fe）∶n（Mg）,n（OH）∶n（M）,etc.The results show that when the concentration of SiO₂ is 0.2 mol/L,n（Si）∶ n（M）=1,n（Fe）∶n（Mg）=0.5,n（OH）∶n（M）=0, its decoloration capacity is obviously better than that of traditional flocculants, such as PAC,PFS,etc.

Key words: flocculant, polysilicate ferric magnesium, decoloration

摘要：

在聚硅酸中同时引入镁盐和三价铁盐,制备出聚硅酸铁镁絮凝剂(PMFS).将其用于对染料废水的脱色研究.结果表明,其絮凝性能及稳定性受硅含量、n(Si):n(M)、n(Fe):n(Mg)以及碱用量等因素的影响,SiO₂浓度为0.2mol/L、n(Si):n(M)=1、n(Fe):n(Mg)=0.5、n(OH):n(M)=0时,其脱色效果明显优于聚合氯化铝(PAC)、聚合硫酸铁(PFS)等传统絮凝剂.

关键词: 絮凝剂, 聚硅酸铁镁, 脱色性能

CLC Number: 

• X703.5