常温铁氧体法处理重金属离子废水研究

Treatment of Wastewater Containing Heavy Metal Ions by Ambient Temperature Ferrite Process

以Ca(OH)2饱和溶液作pH调整剂,以Na2CO3作添加剂,采用常温铁氧体法处理重金属离子废水。研究了重金属离子类型及n(Fe2+)/n(M2+)对磁性产物性质的影响。实验结果表明:重金属离子类型及n(Fe2+)/n(M2+)对磁性产物中金属的回收率、磁性产物的稳定性及饱和磁化率均有较大的影响。采用该法处理金属采选废水,处理后的废水中各种金属离子的质量浓度均达到污水综合排放标准(GB8978—1996)。

The wastewater containing heavy metal ions was treated by the ambient temperature ferrite process with Ca（OH） 2 saturated solution as pH regulator and Na2CO3 as additive. The effects of heavy metal ion kinds and n （ Fe^2＋ ）/n （ M^2＋ ） on the properties of magnetic products were studied. The experimental results indicate that the kinds of heavy metal ions and n （ Fe^2＋ ）/n （ M^2＋ ） have significant effects on the recovery rates of metals, the stability and saturation magnetization rate of the magnetic products. The process can be used in the treatment of mining-picking wastewater and the mass concentrations of all kinds of metal ions in the effluent can meet the national discharge standards（ GB8978-1996 ）.