磁性埃洛石复合材料的制备及其对亚甲基蓝吸附性能研究

利用简单的化学共沉淀法成功合成了磁性埃洛石复合材料，并用静态批示法对其吸附亚甲基蓝的行为进行研究。采用红外光谱仪( FT-IR)、透射电子显微镜( TEM)、X射线衍射仪( XRD)和振动样品磁强计( VSM)对磁性埃洛石进行表征，考察了埃洛石/FeCl3·6H2 O质量比、吸附剂投入量、亚甲基蓝初始浓度、溶液初始pH值和吸附时间等因素对亚甲基蓝在磁性埃洛石上吸附的影响，并进行了吸附动力学研究。结果表明：Fe3 O4纳米粒子成功地复合到埃洛石的表面；溶液初始pH值对磁性埃洛石吸附亚甲基蓝的影响较大；磁性埃洛石复合材料对亚甲基蓝的吸附行为符合准二级动力学模型。

Preparation of Magnetic Halloysite Composite and Its Adsorption Performance for Methylene Blue

Magnetic halloysite composite was synthesized by chemical co-precipitation method. The adsorption performance for magnetic halloysite composite was synthesized by static experimental method. The adsorption performance for methylene blue was investigated by static experimental method. The adsorbent was characterized by Fourier transfer infrared ( FT-IR ) , Transmission Electron Microscope ( TEM) , X-Ray Diffractome ( XRD ) and vibrating sample magnetometer ( VSM ) . Batch adsorption experiments were conducted to study the influence of various factors, such as HNTs/FeCl3 ·6H2 O mass ratio, adsorbent dose, initial concentration of methylene blue, initial pH, contact time on the adsorption of methylene blue. At the same time, the adsorption kinetics was investigated. The results indicate that magnetic halloysite composite is successfully obtained. The adsorption of magnetic halloysite for methylene blue is strongly affected by initial pH. The adsorption behavior is fitted well to the pseudo-second-order kinetic model.