Adsorption using nanomaterials is considered an effective method for controlling the levels of toxic heavy metal in wastewater. Herein, a novel adsorbent, core-shell phase-transited lysozyme film-coated magnetic nanoparticles (Fe₃O₄@SiO₂@PTL) for Hg(II) ions removal from aqueous solutions was explored via facile and fast phase transformation and self-assembly process of lysozyme. The physiochemical properties of Fe₃O₄@SiO₂@PTL were investigated using various characterization techniques. The adsorption performances such as kinetics, isotherms, selectivity, the effect of coexisting ions, and regeneration were evaluated. Fe₃O₄@SiO₂@PTL showed an extremely high Hg(II) uptake rate and achieved more than 90% equilibrium adsorption capacity in 5 min. Hg(II) adsorption was followed by a pseudo–second–order kinetic model and fitted the Langmuir model by achieving a maximum uptake of 701.51 mg/g. Furthermore, excellent Hg(II) selectivity was obtained in a mixed solution containing various heavy metal ions, along with good chemical stability owing to the high adsorption capacity maintained after five cycles. The adsorption analyses indicated that the amino, imino, amide, hydroxyl, carboxyl, and thiol groups exposed on the surface of Fe₃O₄@SiO₂@PTL were vital for Hg(II) removal. Consequently, this work will significantly assist in the development of an easily available, eco-friendly, and selective adsorbent material to remove heavy metal ions from wastewater.

使用纳米材料吸附被认为是控制废水中有毒重金属含量的有效方法。本文中，通过快速，快速的相变和自吸附，探索了一种新型的吸附剂，核壳相转移溶菌酶膜包裹的磁性纳米粒子（Fe ₃ O ₄ @SiO ₂ @PTL），用于从水溶液中去除Hg（II）离子。溶菌酶的组装过程。利用各种表征技术研究了Fe ₃ O ₄ @SiO ₂ @PTL的理化性质。评估了吸附性能，如动力学，等温线，选择性，共存离子的影响和再生。铁₃ O ₄ @SiO₂ @PTL显示极高的Hg（II）吸收速率，并在5分钟内达到90％以上的平衡吸附容量。Hg（II）吸附之后是伪二级动力学模型，通过最大吸收为701.51 mg / g拟合了Langmuir模型。此外，由于在五个循环后保持了高吸附容量，因此在包含各种重金属离子的混合溶液中获得了极好的Hg（II）选择性，并且具有良好的化学稳定性。吸附分析表明，Fe ₃ O ₄ @SiO ₂表面暴露出氨基，亚氨基，酰胺基，羟基，羧基和硫醇基。@PTL对于去除Hg（II）至关重要。因此，这项工作将大大有助于开发一种易于获得，环保和选择性的吸附材料，以去除废水中的重金属离子。