钛白粉生产副产物和废硫酸制备混凝剂的试验  

Preparation of polyferric sulfate coagulant with titanium dioxide by-product and waste sulfuric acid

作　　者：黄勇强[1] 吴涛[1] 吴春笃[1,2] 徐明力[1] 厉晶晶[1] 

机构地区：[1]江苏大学环境学院,江苏镇江212013 [2]扬州环境资源职业技术学院,江苏扬州225127

出　　处：《江苏大学学报（自然科学版）》2011年第4期474-477,496,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家"十一五"重大水专项基金资助项目(2008ZX07317-001)

摘　　要：以钛白粉生产中的副产物硫酸亚铁和废硫酸为原料,采用氧化法制备混凝剂聚合硫酸铁(PFS).运用X射线衍射法、扫描电镜法及红外光谱法对制得的聚合硫酸铁进行了表征.通过混凝试验,利用絮体颗粒的生长比较样品PFS、市售PFS和FeSO4去除水中悬浮物的效果.结果表明:制备的PFS为颗粒大小及形状不均匀的片状物,而且是羟基桥连的铁的聚合物;制备的PFS处理性能良好,在处理模拟废水时,絮体生长速率较快,絮体颗粒达到平衡耗时较短,最终絮体平均粒径较大;制备的PFS对废水浊度去除率可达到95%以上,对废水色度去除率可达80%,与市售PFS的混凝效果相当.The by-product of ferrous sulphate from titanium dioxide production and waste sulfuric acid were used to prepare polyferric sulfate（PFS） by direct oxidation.The structure of PFS was characterized by X-ray diffraction,scanning electron microscope and infrared spectrum.The turbidity removal ability of prepared PFS was compared with purchased PFS and FeSO4 in aqueous solution by growing coagulation behaviors in jar-test.The results show that the prepared PFS,which is inhomogenous flake with different size and shape,is hydroxy-bridged polymer of iron.For simulated wastewater treatment,the prepared PFS has good turbidity removal efficiency of 95% with color removal efficiency of 80%,which is comparable with purchased PFS.Floc grows quickly and can reach balance state in short time with large average size of floc.

关 键 词：硫酸亚铁 混凝剂 聚合硫酸铁 表征 絮体粒度 

分 类 号：TQ111.16[化学工程—无机化工]