聚硅酸锌镁的制备及其性能

Preparation and properties of polymerized silicate containing magnesium sulfate and zinc sulfate(PSMZS)

以硅酸钠、硫酸锌、硫酸镁为原料,通过共聚法制备了无机高分子絮凝剂聚硅酸锌镁(PSMZS),研究了Na2SiO3的摩尔浓度、活化时间、Mg/Si、Zn/Si配比及絮凝剂的投加量对絮凝效果的影响,用X射线衍射(XRD)和电子扫描电镜(SEM)对该絮凝剂的结构及形貌进行了表征。结果表明:当Na2SiO3的浓度为0.4mol/L,硅酸活化时间为1.5h,Si/Mg的摩尔比为1∶5,Zn/Si摩尔比为0.5,絮凝剂投加量为25mL/L废水时,絮凝剂的电中和能力和吸附架桥能力最强,絮凝剂对含H-酸染料模拟废水的絮凝效果最好。

Inorganic polymer flocculants, poly（magnesium silicate zinc sulfate） （PSMZS） were prepared by the copolymerization of sodium silicate with zinc sulfate and magnesium sulfate. The influences of SiO2 concentration, activation time, Mg/Si and Zn/Si molar ratio and flocculant dosage on the flocculation efficiency were investigated. The structure and morphology of the prepared PSMZ flocculant were studies using XRD and SEM. The optimal preparation conditions for PSMZ are 0.4 mol/L of SiO2 concentration, 1.5 hours of ageing time with 1 ： 5 ： 0.5 ofSi ： Mg ： Zn molar ratio. The optimal flocculant dosage was found to be 25 mL/L wastewater, where PSMZS has a banded structure featuring excellent flocculation efficiency.