Abstract:

In order to improve the coagulating effect of the coagulant, solid and colloidal sel-f made A-FeOOH, which are prepared from green vitriol, have been fully mixed with ordinary coagulants, AS and PAC, to produce nanometersized modification coagulant. Then nanometer-sized modification coagulant is put into diluted paper-making black liquor. It is found that coagulat ing effect of colloidal nanometer-sized material is better than that is solid state and the removal rate of COD_Cr in the wastewater can be 10%～30% higher than putting into ordinary coagulant.

Key words: nanometer-sized material, coagulant, A- FeOOH, wastewater treatment, modification

摘要：

为提高混凝剂的混凝效果，本试验以绿矾为原料，自制固体与溶胶态的纳米α-FeOOH，与常用混凝剂硫酸铝和聚合氯化铝充分混合，得到纳米改性混凝剂，应用于造纸黑液处理．试验发现，纳米材料以溶胶态形式添加的混凝效果比固态形式的效果好；其废水的COD_Cr去除率比常用混凝剂提高10%～30%．

关键词: 纳米材料, 混凝剂, α-FeOOH, 废水处理, 改性

CLC Number: 

• TQ085+.412