羟基聚合磷硫酸铁絮凝剂的制备及其絮体分形特征研究  

Experimental Study on Preparation of Polymeric Ferric Phosphoric Sulfate by Bio-oxidation andFractal Characteristics of Flocs at Different Preparation Parameters

作　　者：李鹰[1] 刘峙嵘[1] 戴荧[1] 

机构地区：[1]东华理工大学化学生物与材料科学学院,江西抚州344000

出　　处：《湿法冶金》2009年第4期236-241,共6页Hydrometallurgy of China

基　　金：东华理工大学研究生创新基金(DYCA-08010)

摘　　要：以钛白粉副产品绿矾(FeSO4.7H2O)为主要原料,采用微生物催化氧化法制备聚合磷硫酸铁(PFPS),研究了Fe2+初始质量浓度、pH、培养温度、接种量对细菌生长和氧化Fe2+的影响,考察了不同制备参数——磷铁物质的量比(n(PO43-)/n(Fe))、羟铁物质的量(n(OH-)/n(Fe))对PFPS絮体分形维数的影响。结果表明:细菌氧化Fe2+的最佳条件为Fe2+初始质量浓度8.52 g/L,pH=2,培养温度35℃,接种量10%;当n(PO43-)/n(Fe)=1/20,n(OH-)/n(Fe)=2/5时,絮体的分形维数值最大,絮凝效果最好。采用该聚合磷硫酸铁净化实验室模拟的高岭土废水(100 NTU),絮凝效果优于聚合硫酸铁(PFS)。Polymeric ferric phosphoric sulfate was prepared by biological oxidation method using a by-product of titanium pigment as principal raw material. The influence of some factors such as initial Fe^2＋ concentration, pH, temperature and inoculation concentration on growth of bacteria and oxidation of Fe^2＋ was examined. The results showed that bacteria has the highest activity at the conditions of initial Fe^2＋ concentration of 8.59 g/L, pH 2, culture temperature of 35℃ and inoculation concentration of 10%. Different preparation parameters such as n（PO4^3- ）/n（Fe） .n（OH^- ）/n（Fe） which influenced the fractal dimension of polymeric ferric phosphoric sulfate was examined. The fractal dimension of Floc was largest and the flocculation was best when the n（PO4^3- ）/n（Fe） was 0.05 and the n（OH^- ）/n（Fe） was 0.4. The flocculation agent applied for disposing experiment simulated wastewater Kaolin solution produced better effects than PFS.

关 键 词：聚合磷硫酸铁 生物氧化法 制备 絮体 分形维数 

分 类 号：X788[环境科学与工程—环境工程]