复合絮凝剂聚硅硫酸铁的形貌结构及性能研究

Study of the Image and Coagulation Behavior of Polyferric Silicate Sulfate

向聚硅酸中引入铁盐制得聚硅硫酸铁(PFSS)复合絮凝剂,通过电子显微镜观察分析了不同铁硅摩尔比的PFSS的形貌,用红外光谱研究了其中铁离子与聚硅酸的相互作用情况,并对其稳定性和絮凝性进行了考察。结果发现:聚硅硫酸铁的形貌均为长链枝杈状聚集态,铁硅摩尔比对形貌结构及絮凝性能有较大影响;红外光谱证实PFSS中硅与铁形成了Si-O-Fe键;聚硅硫酸铁的稳定性高于聚硅酸,并且随着n(Fe)∶n(Si)的增大而提高。

Polyferric silicate sulfate＇（PFSS） is prepared by introducing ferric salt into polysilicic acid. Their images of various molar ratio of Fe to Si are observed by electron microscope. Their coagulation behavior and stability are studied, The interaction between polysilicic and polyferric ion is observed by infrared spectrum. The result shows that the image of PFSS is ramificate. The molar ratio of Fe to Si affects greatly the image. The infrared spectra prove that the bond of Si-O-Fe is formed in PFSS. The stability of PFSS is higher than that of polysilicic acid.