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采用共沉淀法制备磁性埃洛石复合材料,并对其吸附十八烷胺的行为进行研究.利用红外光谱(FT-IR)、透射电子显微电镜(TEM)和振动样品磁强计(VSM)对磁性埃洛石进行表征,研究吸附剂浓度、吸附时间、溶液p H值和温度对十八烷胺在磁性埃洛石上吸附的影响,采用Lagrange准二级动力学方程、Langmuir等温线方程及Freundlich等温线方程对实验数据进行拟合.结果表明:Fe3O4纳米粒子成功的负载到埃洛石的表面;p H值和温度对十八烷胺在磁性埃洛石上的吸附影响较大;十八烷胺在磁性埃洛石上的吸附符合二级动力学模型;热力学符合Langmuir等温线方程,并且高温利于十八烷胺的吸附.
The preparation of magnetic halloysite composites by coprecipitation method and the adsorption behavior of octadecaneamine were studied by FT-IR, TEM and vibrating sample magnetometer (VSM) ) On the magnetic characteristics of halloysite, adsorbent concentration, adsorption time, the solution p H value and temperature on the adsorption of octadecylamine on the magnetic halloysite, using Lagrange pseudo second-order kinetic equation, Langmuir isotherm equation And Freundlich isotherm were used to fit the experimental data.The results showed that the Fe3O4 nanoparticles were successfully loaded on the surface of halloysite and the p H value and temperature had a significant influence on the adsorption of octadecylamine on the magnetoflora The adsorption of octaalkylamine on magnetic halloysite conforms to the second-order kinetic model. The thermodynamics accords with the Langmuir isotherm equation, and the high temperature is favorable for the adsorption of octadecylamine.