聚硅酸硫酸铁混凝剂的性能研究  

Study on The Property of Coagulant Polymeric Ferric Silicate Sulfate(PFSS).

作　　者：高宝玉[1] 宋永会[2] 岳钦艳[3] 

机构地区：[1]清华大学环境工程系 [2]山东矿业学院化工系 [3]山东大学环境工程系

出　　处：《环境科学》1997年第2期46-48,共3页Environmental Science

基　　金：煤炭高校优秀青年科学基金

摘　　要：以硅酸钠、硫酸和硫酸铁为原料制备聚硅酸硫酸铁混凝剂（简称ＰＦＳＳ），考察了ＰＦＳＳ在不同条件下水解产物表面的ζ电位变化情况，研究了Ｆｅ／ＳｉＯ２摩尔比和投加量对ＰＦＳＳ除浊效果的影响，试验了ＰＦＳＳ的最佳混凝ｐＨ范围与Ｆｅ／ＳｉＯ２摩尔比之间的关系，探讨了其混凝机理．结果表明，Ｆｅ／ＳｉＯ２摩尔比对ＰＦＳＳ水解产物的ζ电位、ＰＦ－ＳＳ的混凝效果以及ＰＦＳＳ适宜的最佳ｐＨ值范围都有影响；当Ｆｅ／ＳｉＯ２摩尔比达１．５左右时，ＰＦＳＳ的混凝除浊效果趋于最佳．Polymeric ferric silicate sulfate(PFSS),a new kind of coagulant,has been prepared by using sodium silicate, sulfate acid and ferric sulfate as raw materials.The Zeta potential(ζ)of hydrolyzate of PFSS was measured at various pH values so as to know its electrokinitic natures.The effects of Fe/SiO 2 molar ratio and dosages on the coagulation were investigated.Also,the optimum pH range for coagulation was examined in respect to the molar ratio of Fe to SiO 2.Finally,the coagulation mechanism of PFSS for kaolinite suspension was discussed.The experimental results showed that the molar ratio of Fe/SiO 2 has effect on the Zeta potential(ζ)of hydrolyzate of PFSS,the turbidity removal result of PFSS for kaolinite suspension, and the pH range suitable for coagulation.The turbidity removal effect of PFSS for kaolinite suspension tends to reach optimum when the molar ratio of Fe/SiO 2 is or more than 1 5.

关 键 词：混凝剂 聚硅酸硫酸铁 Ζ电位 除浊 性能 

分 类 号：TQ314.253[化学工程—高聚物工业] TQ085.4