聚硅酸铁镁絮凝剂制备及其脱色作用的研究

Studies on the preparation and decolorization of polysilicate ferric magnesium flocculant

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。

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.