作　　者： ; ; ; ; ;

机构地区： 广东工业大学环境科学与工程学院

出　　处： 《无机盐工业》 2011年第2期4-6,共3页

摘　　要： 介绍了混凝剂聚硅酸硫酸铝铁(PAFSS)的制备方法和应用研究的新进展,讨论了PAFSS混凝剂的混凝作用机理及其稳定性。指出制备良好的聚硅酸硫酸铝铁混凝剂,关键因素是控制Al/Fe/Si的物质的量比、硅酸浓度、温度、pH和铝盐、铁盐的加入顺序。通过调节pH、控制二氧化硅浓度、向PAFSS中投加无水乙醇、正丁醇、丙酮等稳定剂,可以有效延缓PFASS混凝剂的凝胶速度,提高了其稳定性。此外,针对目前聚硅酸盐在应用中存在的问题,提出了今后的研究方向。 ：New research progress in preparation and application of polymeric ferric aluminium silicate sulfate （PAFSS） coagulant was introduced,and the coagulation mechanism and stability of PAFSS were also discussed. It was pointed that the key factor of preparing a good PAFSS coagulant was the control of amount-of-substance ratio of Al/Fe/Si, silicic acid con- centration, temperature, pH, and adding sequence of aluminium and ferric salts. It can effectively delay the PAFSS coagulant＇s gelation speed and improve its stability with adjusting pH, controling the concentration of SiO2, adding the absolute ethanol, normal butanol, acetone, and other stabilizers in PAFSS. In addition, in allusion to the present problems in application of polysilicates, the research direction in future was proposed.

关 键 词： 聚硅酸 聚硅酸铁铝 混凝剂 硫酸

领　　域： [化学工程]