聚硅酸金属盐絮凝剂的制备和絮凝性能

PREPARATION AND FLOCCULATION OF POLYSILICATE-METALS (PSMS) FLOCCULANTS

本文对制备聚硅酸金属盐(Polysilicate-Metals,PSMS)絮凝剂的条件及其絮凝除浊除色效果进行了实验研究。结果表明,在适当酸化pH条件下,进行硅酸与金属离子(Al^(3+),Fe^(3+)或Al^(3+)/Fe^(3+))聚合反应,可获得具有较高分子量的PSMS,低浓度PSMS可以保持较长稳定时间,与传统铝、铁盐凝聚剂相比,PSMS可显著提高并改善絮凝除浊除腐植酸的效果,这种PSMS絮凝剂更适合于水厂现场制备投加。

Some conditional experiments for the preparation of polysilicate-metal salts (PSMS) and its coagulation and flocculation for removal of turbidity and humics were condutcted and discussed. Preliminary results show that the preparation of PSMS floccu-lants are relatively simple, but it may be necessary to master some operative technique. The PSMS products with low concentration of metal ions and low content of SiO2 would be stable for longer time and can greatly improve and raise the coagulation and flocculation efficiency for removal of turbidity and humics, when compared to traditional coagulants. The PSMS flocculants appear to be appropriate for the preparation in the site of the water treatment.