Environmental water contaminated with pesticides, especially fungicides, is a persistent problem worldwide with grave public health consequences. Existing methods of removing fungicides often cannot address the problem quickly and economically. In the current work, a novel β-cyclodextrin modified Fe₃O₄@MIL-100(Fe) composite (Fe₃O₄@MIL-100(Fe)/β-CD) was synthesized and utilized as an adsorbent for the removal of fungicides from environmental water. Characterization of the adsorbent revealed that β-CD had been successfully tethered to the shell of Fe₃O₄@MIL-100(Fe) via tetrafluoroterephthalonitrile as a cross-linker. The main parameters which could affect the adsorption efficiency were investigated, such as the amount of adsorbent, pH value of the solution, adsorption equilibrium time, and ionic strength. The adsorption performance of Fe₃O₄@MIL-100(Fe)/β-CD was assessed, and the β-CD modified surface exhibited high adsorption capacities for triazole fungicides. Moreover, the regeneration of the adsorbent was explored across 5 successive cycles, and the results indicated excellent stability. Finally, the proposed material was successfully applied to the removal of four fungicides in real environmental water samples, and the adsorption efficiencies ranged from 64.52 to 102.10 mg g⁻¹. Compared with other materials, Fe₃O₄@MIL-100(Fe)/β-CD displayed outstanding adsorption capacity and a short adsorption equilibrium time, and it could offer a new platform for the removal of trace triazole fungicides in complicated matrices.

中文翻译：

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用β-环糊精对金属-有机骨架进行后修饰，以有效去除环境水中的杀菌剂

在世界范围内，农药，尤其是杀真菌剂等污染的环境水是一个持续存在的问题，对公共健康造成严重后果。现有的去除杀真菌剂的方法通常不能快速且经济地解决该问题。在目前的工作中，合成了新型的β-环糊精改性的Fe ₃ O ₄ @ MIL-100（Fe）复合材料（Fe ₃ O ₄ @ MIL-100（Fe）/β-CD），并用作吸附剂进行去除。环境水中的杀菌剂。吸附剂的表征表明，β-CD已成功通过分子束缚在Fe ₃ O ₄ @ MIL-100（Fe）的壳上四氟对苯二甲腈作为交联剂。研究了影响吸附效率的主要参数，例如吸附剂的量，溶液的pH值，吸附平衡时间和离子强度。评估了Fe ₃ O ₄ @ MIL-100（Fe）/β-CD的吸附性能，并且β-CD改性的表面对三唑类杀菌剂表现出高吸附能力。此外，在连续5个循环中探索了吸附剂的再生，结果表明其具有极好的稳定性。最终，该材料成功应用于去除实际环境水样中的四种杀真菌剂，吸附效率为64.52至102.10 mg g ^-1。与其他材料相比，铁₃ O ₄ @ MIL-100（Fe）/β-CD具有优异的吸附能力和较短的吸附平衡时间，为复杂基质中的痕量三唑类杀菌剂的去除提供了新的平台。