聚硅酸聚合氯化铝复合型絮凝剂的制备及性能研究

Study on Preparation and Performance of Polysilicic Acid-polyaluminum Chloride Compound Flocculant

以水玻璃和废盐酸为原料，在硅酸钠质量分数为6％～10％、pH〈4的条件下，室温熟化5h左右，制得聚硅酸。将聚硅酸与聚合氯化铝复合，在c（聚合氯化铝）：c（聚硅酸）=2：1时，制得性能较好的聚硅酸聚合氯化铝复合型絮凝剂，可用于废水处理。

Polysilicic acid was prepared with water glass and waste hydrochloric acid as raw materials under conditions as follows：6% - 10% sodium silicate concentration,pH value less than 4 and 5 hours room temperature curing. Polysilicic acid and polyaluminium chloride were compounded to make polysilicic acid-polyaluminium chloride compound flocculant. When the molar ratio of polyaluminum chloride and polysilicic acid was 2 ： 1, the flocculant with better performance was obtained, which could be used in wastewater treatment.