【摘要】 用硫酸铝渣制得了聚硅酸硫酸铝,研究了影响硅酸聚合的条件,选取pH=3.5～4.0、SiO2浓度为4%的条件进行聚合.用制得的聚硅酸硫酸铝处理模拟浊水,当聚硅酸硫酸铝中nAl/Nsi达到0.25后,用量为0.3～2.3mL时除浊率均达90%以上;聚硅酸硫酸铝处理模拟浊水时适用的pH范围为7.0～9.0.用聚硅酸硫酸铝处理垃圾填埋场渗沥液,与聚合氯化铝相比具有更高的除浊率.更多还原

【Abstract】 The polyaluminium silicate sulfate flocculants were prepared from bauxite sledge.The polymerization of silicate acid was studied,and the proper conditions of polymerization were slected:pH=（3.5）～4.0,concentration of SiO₂ 4%.The polyauminium silicate sulfate flocculants were applied to treat simulating turbid water and filland leachates.When pH=7.0～9.0,the amount of flocculants is 0.3～2.3?mL,and n_Al/n_Si≥0.25,the removal rate of turbidity is above 90%.The treatment results of filland leachates showed that the removal rate of turbidity by the polyaluminium silicate sulfate flocculants is better than that of plyaluminium chloride flocculants.更多还原