摘要：

制备核壳磁性吸附剂MnFe₂O₄@Al₂O₃用于含铜废水的吸附实验研究。结果表明，MnFe₂O₄@Al₂O₃可有效去除水中的铜离子，在MnFe₂O₄@Al₂O₃投加质量浓度2.0 g/L、Cu²⁺质量浓度20 mg/L、pH为6.0、吸附时间180 min的条件下，Cu²⁺去除率达97%。MnFe₂O₄@Al₂O₃对Cu²⁺的吸附过程符合伪二级动力学方程，为多层化学吸附。VSM分析表明MnFe₂O₄@Al₂O₃具备超顺磁性的优势。

关键词: 重金属, 吸附, 磁性纳米复合材料, MnFe₂O₄@Al₂O₃

Abstract:

The core/shell nano-particle adsorbent of MnFe₂O₄@Al₂O₃ was prepared and introduced in wastewater containing copper ions adsorption experiment. The experimental results showed that the core/shell nano-particle adsorbent of MnFe₂O₄@Al₂O₃ could effectively remove copper ions from wastewater. Under the conditions of 20 mg/L Cu²⁺ concentration, pH 6.0, 2.0 g/L adsorbent dosage, and 180 min adsorption time, the removal rate of Cu²⁺ was up to 97%. The dynamic process of Cu²⁺ adsorption followed the pseudo-secondary order model, which was multi-layer chemical adsorption. VSM analysis showed that the MnFe₂O₄@Al₂O₃ had the advantage of superparamagnetism.

Key words: heavy metal, adsorption, magnetic nanocomposite, MnFe₂O₄@Al₂O₃

中图分类号: 

• X703