【摘要】 活性硅酸是制备硅酸助凝剂及新型含金属离子的聚硅酸系无机高分子絮凝剂的重要原料,活性硅酸的聚合速度受搅拌速度的影响显著,而中国对这方面的报道较少。采用激光光散射、浊度、黏度等多种表征方法对活性硅酸在聚合过程中的形态变化进行了监测及表征,结果表明:搅拌速度越快,硅酸的聚合速度越快,但形成的有效粒径反而越小;选择在静置条件下制备活性硅酸,有利于形成高分子量、高黏度、高浊度的聚硅酸,更有利于聚硅酸吸附架桥作用的发挥,这为制备高效混凝剂提供了实验依据。更多还原

【Abstract】 Activated silica acid is an important raw material for both producing silica acid coagulant and new inorganic metallic ion-containing high-molecular polysilica acid coagulants.Rate of polymerization of the activated silica acid is affected by the speed of stirring markedly.And there are few reports in this field in China.Based on several direct and indirect me-thods,such as PCS,turbidity,and viscosity,the change of morphology of activated silica acid during its polymerization process were monitored and characterized.Results showed that the quicker of stirring speed was provided and the quicker of polymerization rate of activated silica acid was obtained,however,the smaller of effective diameter as well.Selecting the still condition to prepare activated silica acid was beneficial to the formation of higher molecular weight,higher viscosity,and higher turbidity polysilica acid,and it was more conducive to bringing the adsorption and bridge functions of polysilica acid into play.Results provided an experimentation basis for preparation of high-efficient coagulants.更多还原