聚硅酸类混凝剂的改性研究进展

综述了聚硅酸类混凝剂的制备工艺、改性方法及机理探索方面的研究概况，并对未来的研究方向进行了分析和预测．     

聚硅酸盐类絮凝剂的开发与研制

我国是一个水资源短缺的国家,人均水占有量只有世界人均水占有量的1/4.随着工农业生产的发展,水污染日趋严重,地表水处理和污水处理回用日益受到重视,水处理剂的需求量迅速增大,新型絮凝剂的开发与研制越来越受到人们的重视.     

硼对聚硅酸盐类絮凝剂性能改善研究

在阐述聚硅酸盐类絮凝剂制备工艺优化思路的基础上，向优化条件下制备出的聚硅酸铝铁絮凝剂中加入不同物质的量的硼，通过不同剂量和储存时间两方面的对比试验，研究硼对提高聚硅酸盐类絮凝剂稳定性、改善性能等方面的影响．结果表明，硼的引入可明显提高聚硅酸盐类絮凝剂絮凝性能，且稳定性增强，有利于生产中的推广应用．     

Study on coagulation property of metal-polysilicate coagulants in low turbidity water treatment

In order to remove the low turbidity present in surface water, a novel metal-polysilicate coagulant was used to treat the raw water taken from Tanjiang River in Guangdong Province. This study on the effects of A1/Fe molar ratio on the performance of a complex compound formed by polysilicic acid, aluminium and ferric salt (PAFS) showed that PAFS with A1/Fe ratio of 10:3 seemed to have the best coagulation performance in removing turbidity and color. Experimental results showed that under the conditions of polymerization time of 15 d, sedimentation time of 12 min, and pH of 6-8,PAFS with A1/Fe molar ratio of 10:3 had the best coagulation efficiency and lowest residual A1 concentration. The turbidity decreased from 23.8 NTU to 3.23 NTU and the residual A1 concentration was only 0.165 mg/L in the product water. It could be speculated that colloidal impurities and particulate A1 were removed by adsorption bridging and electrical neutralization of long chain inorganic polymer coagulants.