Synthesis of indium oxide-polyacrylamide composite material and its adsorption performance for copper(Ⅱ)
LI Wanjun1, DOU Junnan1, ZHANG Zhenyu2
1. Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China; 2. State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China
Abstract：The intake of high concentration Cu(Ⅱ) constructs a serious threat to human life and health. Therefore, the removal of excess Cu(Ⅱ) in the environment is of great significance. The In2O3-polyacrylamide composite material was synthesized using acrylamide and methylene bisacrylamide as the monomers and using In2O3 nanoparticles as the modified material. The prepared composite material was characterized by scanning electron microscope (SEM), N2 adsorption-desorption measurement, and infrared spectrometer. Combined with the flame atomic absorption spectrometry(FAAS), the adsorption performance of composite material as adsorbent on Cu(Ⅱ) was investigated. The influence of solution pH and adsorption time on the adsorption percentage was optimized. In addition, the adsorption kinetics, isotherms, and thermodynamics of composite material on Cu(Ⅱ) were studied. The results indicated that when the pH was at 6.0, the adsorption equilibrium of Cu(Ⅱ) could be reached as the adsorption time was 90 min. The adsorption behavior conformed to a pseudo-second order equation and the Freundlich model. The saturated adsorption quantity in experiments was 45.83 mg/g. The calculation of thermodynamic equations demonstrated that the adsorption of Cu(Ⅱ) onto the composite material was a spontaneous and endothermic process. The regeneration ability of composite material was investigated. The desorption efficiency remained above 86% after recycling for 3 times, indicating that the developed material could be reutilized. In conclusion, In2O3-polyacrylamide composite material had a good application prospect in removal of heavy metal ions.
李婉君, 窦俊楠, 张振宇. 氧化铟-聚丙烯酰胺复合材料的合成及其对铜(Ⅱ)的吸附性能[J]. 冶金分析, 2022, 42(7): 39-45.
LI Wanjun, DOU Junnan, ZHANG Zhenyu. Synthesis of indium oxide-polyacrylamide composite material and its adsorption performance for copper(Ⅱ). , 2022, 42(7): 39-45.
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