In this work, a novel Fe₃O₄@ZnAl-LDH@MIL-53(Al) composite was synthesized by a facile three-step process and utilized as an adsorbent for the removal of azole fungicides from environmental water. The characterization results revealed that double hydroxide (ZnAl-LDH) and metal organic framework (MIL-53) have been successfully tethered to the shell of Fe₃O₄. The main factors affecting the removal efficiencies were investigated, and results revealed that Fe₃O₄@ZnAl-LDH@MIL-53(Al) composite possessed high removal efficiencies for azole fungicides. Furthermore, the adsorption mechanism was investigated and including hydrogen-bonding interaction, chemisorption and π–π interaction. The adsorption kinetic was more consistent with the pseudo-second-order kinetic model, and the whole adsorption process could reach the equilibrium within 5 min. Langmuir adsorption isotherm model could describe the adsorption process most accurately, and the maximum adsorption values of azole fungicides were in the range of 43.54–71.79 mg g⁻¹. Meanwhile, the adsorption thermodynamics indicated that the adsorption process was exothermic and spontaneous. Hence, Fe₃O₄@ZnAl-LDH@MIL-53(Al) composite had a great application potential in the removal of azole fungicides from the environment.

在这项工作中，通过简单的三步法合成了一种新型的 Fe ₃ O ₄ @ZnAl-LDH@MIL-53(Al) 复合材料，并将其用作吸附剂从环境水中去除唑类杀菌剂。表征结果表明，双氢氧化物（ZnAl-LDH）和金属有机骨架（MIL-53）已成功地束缚在Fe ₃ O ₄的壳上。考察了影响去除效率的主要因素，结果表明，Fe ₃ O ₄@ZnAl-LDH@MIL-53(Al) 复合材料对唑类杀菌剂具有很高的去除效率。此外，研究了吸附机制，包括氢键相互作用、化学吸附和 π-π 相互作用。吸附动力学更符合拟二级动力学模型，整个吸附过程可在5 min内达到平衡。Langmuir吸附等温线模型可以最准确地描述吸附过程，唑类杀菌剂的最大吸附值在43.54-71.79 mg g ^-1范围内。同时，吸附热力学表明吸附过程是放热自发的。因此，Fe ₃ O ₄@ZnAl-LDH@MIL-53(Al) 复合材料在去除环境中的唑类杀菌剂方面具有巨大的应用潜力。