Functional magnetic Fe₃O₄@PPy microspheres were prepared and characterized by XRD, FTIR, SEM, TEM, and magnetometer, and the adsorption of Hg(II) onto Fe₃O₄@PPy was investigated. The results showed that the adsorption of Hg(II) onto Fe₃O₄@PPy dramatically increases within 5 min and reaches adsorption equilibrium at 200 min. The adsorption of Hg(II) increases with pH increased, and a removal efficiency (RE) of 90.5% was obtained at pH 7.2. The isotherm studies revealed that the adsorption of Hg(II) onto the Fe₃O₄@PPy fits well with the Langmuir isotherm model, and the calculated q_m value of 232.56 mg/g. The adsorption process of Hg(II) onto the Fe₃O₄@PPy is well-fitted by the pseudo-second-order model with a high correlation coefficient (R²) of 0.999. The thermodynamic coefficients (ΔH°, ΔS°, and ΔG°) were calculated from the temperature-dependent adsorption isotherms and illustrated that the adsorption of Hg(II) on the Fe₃O₄@PPy was spontaneous and endothermic. Different desorption agents were used to recover Hg(II) adsorbed onto Fe₃O₄@PPy, and a satisfactory recovery percentage of 93.0% was obtained by using 0.1 M HCl and 0.05 M NaCl.

制备功能性磁性Fe ₃ O ₄ @PPy微球并通过XRD、FTIR、SEM、TEM和磁力计对其进行表征，并研究了Hg(II)在Fe ₃ O ₄ @PPy上的吸附。结果表明，Hg(II) 在 Fe ₃ O ₄ @PPy 上的吸附在 5 分钟内急剧增加，并在 200 分钟时达到吸附平衡。Hg(II) 的吸附量随着 pH 值的增加而增加，在 pH 值为 7.2 时，去除效率 ( RE ) 为 90.5%。等温线研究表明，Hg(II) 在 Fe ₃ O ₄ @PPy 上的吸附与 Langmuir 等温线模型非常吻合，计算得到的q _m值 232.56 毫克/克。Hg(II) 在 Fe ₃ O ₄ @PPy上的吸附过程很好地拟合了伪二阶模型，相关系数 ( R ² ) 为 0.999。热力学系数（Δ H °、Δ S ° 和 Δ G °）由温度相关的吸附等温线计算得出，说明 Hg(II) 在 Fe ₃ O ₄ @PPy 上的吸附是自发和吸热的。使用不同的解吸剂回收吸附在 Fe ₃ O ₄ @PPy上的 Hg(II) ，使用 0.1 M HCl 和 0.05 M NaCl 获得了 93.0% 的令人满意的回收率。