Core–shell structured magnetic γ-Fe₂O₃ coated with proton acid doping polyaniline nanocomposites (γ-Fe₂O₃@PANI) were synthesized and used to adsorb arsenic(V) in aqueous solutions. Results indicated that the as-synthesized γ-Fe₂O₃@PANI had a rapid adsorption rate and high adsorption capacity (0.502 mmol/g) for arsenic(V) removal in a pH range of 4 to 11. The adsorption process obeyed a pseudo-second-order kinetic model and was controlled by intraparticle diffusion and external liquid film diffusion. The Redlich–Peterson isotherm model was suitable to simulate the experiment data, indicating that both the physical and chemical adsorption occurred on the heterogeneous adsorption interfaces. The postulated adsorption mechanism of As(V) on the γ-Fe₂O₃@PANI nanocomposite was possibly ascribed to electrostatic interaction and hydrogen bonding. These results suggest that the magnetic γ-Fe₂O₃@PANI nanocomposite offers a promising candidate for the adsorption of As(V) in practical applications.

中文翻译：

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核-壳结构的磁了γ-Fe _2个ö _3个@PANI纳米复合材料为增强的As（V）吸附

核-壳结构的磁了γ-Fe ₂ ö ₃涂有质子酸掺杂聚苯胺的纳米复合材料（γ-的Fe ₂ ö ₃ @PANI）的合成，并用于在水溶液中吸附砷（V）。结果表明，所合成了γ-Fe ₂ ö ₃@PANI在4至11的pH范围内具有快速的吸附速率和高的吸附容量（0.502 mmol / g），用于去除砷（V）。吸附过程服从拟二级动力学模型，并受颗粒内扩散控制。和外部液膜扩散。Redlich-Peterson等温模型适合模拟实验数据，表明物理吸附和化学吸附均发生在异质吸附界面上。的As（V）在γ-Fe的假定的吸附机构₂ ö ₃ @PANI纳米复合材料可能归因于静电相互作用和氢键。这些结果表明，所述磁了γ-Fe ₂ ö ₃@PANI纳米复合材料为实际应用中的As（V）的吸附提供了有希望的候选者。