Preparation of montmorillonite grafted polyacrylic acid composite and study on its adsorption properties of lanthanum ions from aqueous solution
Preparation of montmorillonite grafted polyacrylic acid composite and study on its adsorption properties of lanthanum ions from aqueous solution
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DOI：
10.1007/s11356-019-04422-9
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发表时间：
2019-02
影响因子：
5.8
通讯作者：
Yunfei Zhou;Chunjie Yan;Sen Zhou;Tian Liang;X. Wen
中科院分区：
文献类型：
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作者：
Yunfei Zhou;Chunjie Yan;Sen Zhou;Tian Liang;X. Wen
采用紫外辐射接枝法制备了蒙脱土接枝聚丙烯酸复合材料（GNM）。通过XRF、SEM、FTIR、XRD、TG、XPS等手段对合成材料进行了表征。实验平衡数据表明，该吸附剂符合Langmuir模型，属于准二级动力学模型。整个吸附过程是自发的，吸热的，并由热力学分析混沌增强。在313.15 K时，GNM对La（III）的最大吸附量为280.54 mg/g。再生实验表明，该吸附剂具有良好的可重复使用性和稳定的脱附效率。本研究表明，GNM具有较高的吸附性能和对La（III）的吸附再生能力，解决了稀土离子对水体的污染以及对La（III）的再生能力。
Montmorillonite grafted polyacrylic acid composite (GNM) was prepared by using ultraviolet radiation grafting method in this work. The synthesized materials were characterized by XRF, SEM, FTIR, XRD, TG, and XPS. The experimental equilibrium data indicates that the adsorbent is suitable for the Langmuir model and belongs to the pseudo-second-order kinetic model. The entire adsorption process is spontaneous, endothermic, and chaotically enhanced by thermodynamic analysis. The maximum adsorption capacity of La(III) by GNM was 280.54 mg/g at 313.15 K. In addition, the regeneration experiment shows that the adsorbent has good reusability and stable desorption efficiency. This study demonstrates that GNM has high adsorption performance and La(III) adsorption and regeneration capabilities to solve the water pollution caused by rare earth ions and regeneration capabilities for La(III).