摘要：

以硫铁矿烧渣为原料，加入适量自制硫酸亚铁，采用氯酸钠氧化法制备固体聚合硫酸铁(PFS)，并应用于生活污水的处理。研究了其分子形态，探讨了用量、碱化度和pH值对COD、浊度和磷的去除率的影响。结果表明：随着碱化度的增加，单核铁离子〔Fe(a)〕的含量逐渐减少，高聚合物〔Fe(c)〕的含量增加，过渡性低度聚合物〔Fe(b)〕的含量接近；碱化度对处理效果影响小；适宜的pH范围为6～10；当生活污水的COD和浊度分别为143．9mg/L和53NTU时，铁的最佳用量为55．53mg/L，COD、浊度和磷的去除率可分别达65．18%,98．68%和76．16%。

关键词: 硫铁矿烧渣, 固体聚合硫酸铁, 分子形态, 生活污水, 去除率

Abstract:

Solid polymeric ferric sulfate (PFS) is prepared by NaCI0₃ oxidation process using pyrite cinders and a suitable amounts of FeS0₄·7H₂O as raw materials and applied to the treatment for municipal sewage. The molecularity distribution of solid PFS and the influences of dosage basicity and pH values on the removal rates of COD, turbidity and phosphorus have been investigated. The results obtained indicate that with the basicity of solid PFS increasing, the percentage of iron monomers is decreased gradually, and that of the polymeric species is increased,while the percentage of transitional lower polymeric species is close to each other; that the basicity of solid PFS on the treatment effect is very small; that the suitable pH range is 6-10; and that when the COD and turbidity of the sewage tested are 143.9 mg/L and 53 NTU, respectively, the optimum dosage of iron is 55.53 mg/L, the removal rates of COD, turbidity and phosphorus are 65.18%,98.68% and 76.16%,respectively.

Key words: pyrite cinders, solid polymeric ferric sulfate, molecularity, municipal sewage, removal rate

中图分类号: 

• X781.1