聚合硅酸硫酸铝形态的研究

采用共聚法和复合法制备了具有不同硅酸聚合度、碱化度和铝硅摩尔比的聚合硅酸硫酸铝(PASiS)．采用Al-Ferron逐时络合比色法和显微电泳技术，研究了制备方法和参数变化对PASiS形态分布和水解产物荷电特征的影响，分析了PASiS中聚硅酸与铝水解聚合产物的作用方式．水处理实验结果表明，PASiS的絮凝效果优于PAC,PAS，PASC和PAM等絮凝剂，而又以共聚法制备的PASiS的絮凝效果更佳；不同碱化度、硅酸聚合度及铝硅摩尔比的PASiS表现出不同的絮凝性能，吸附架桥及捕获沉淀是其主要絮凝机理。

Aluminum Species and Flocculating Mechanism of Polymeric Aluminum Silicate Sulfate

A series of polyaluminum silicate sulfate (PASiS) with different basicities, Al/Si molar ratios and silicic acid polymerization degrees was prepared by the copolymerization (COPOLY) and composite polymerization (COMPOLY) techniques. The distribution of aluminum species in PASiS, the charged characteristic of its hydrolysis products and their affecting factors were investigated by the Al-Ferron timed complex colorimetric method and the micro-electrophoresis method. In addition, the interaction between polysilicic acid and hydrolysis aluminum species in PASiS was discussed. The experimental results of water treatment show that the flocculation effect of PASiS is better than polyaluminum chloride, polyaluminum sulfate, polyaluminum sulfate-chloride and polyacrylamide, and PASiS (COPOLY) is better than PASiS (COMPOLY). The flocculation properties of PASiS are related to the basicity, Al/Si molar ratio and polymerization degree. The adsorbing-bridging and entrapping-settling are the principal mechanisms of PASiS functioning.