硫酸铝渣研制聚合硅酸硫酸铝絮凝剂  

Preparation of polyaluminium silicate sulfate flocculants from bauxite sledge

作　　者：郑晓虹[1] 王维钬[1] 孙小花[1] 陈震[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007

出　　处：《吉林化工学院学报》2004年第2期17-20,共4页Journal of Jilin Institute of Chemical Technology

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.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 SiO_2 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.

关 键 词：聚硅酸硫酸铝 硫酸铝渣 制备 垃圾填埋场渗沥液 

分 类 号：X705[环境科学与工程—环境工程]