Six kinds of 1,3,4-oxadiazole-functionalized fibers were prepared to evaluate the adsorption capacity for Hg²⁺. Finally, a functionalized fiber (PAN_p-PMODF) with the best adsorption performance was selected for further research. The PAN_p-PMODF fiber was characterized by infrared (IR), elemental analysis (EA), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The PAN_p-PMODF shows excellent selectivity for mercury ions in a mixed heavy metal ion solution (Hg²⁺, Ni²⁺, Pb²⁺, Zn²⁺, Ag⁺, Co²⁺, Cr³⁺, Cu²⁺, and Cd²⁺), and it can reduce the concentration of Hg²⁺ to 44 ppb in the actual sewage, which is of great practical value for the treatment of mercury pollution. Furthermore, the adsorbed Hg²⁺ can be desorbed completely by dilute HNO₃ and the PAN_p-PMODF can be reused many times with excellent recyclability.

中文翻译：

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乙二唑功能化纤维对Hg ^2+的选择性吸附

制备了六种1,3,4-恶二唑官能化纤维，以评价其对Hg ²⁺的吸附能力。最后，选择具有最佳吸附性能的功能化纤维（PAN _p-PMOD F）进行进一步研究。PAN _p-PMOD F纤维的特征在于红外（IR），元素分析（EA），扫描电子显微镜（SEM），X射线衍射（XRD）和X射线光电子能谱（XPS）。PAN _p-PMOD F对混合重金属离子溶液（Hg 2 ⁺，Ni 2 ⁺，Pb 2 ⁺，Zn 2 ⁺，Ag ⁺，Co 2 ⁺，Cr ³⁺，Cu²⁺和Cd ²⁺），可将实际污水中的Hg ²⁺浓度降低至44 ppb，对于处理汞污染具有很大的实用价值。此外，被吸附的Hg ²⁺可以被稀的HNO ₃完全解吸，并且PAN _p-PMOD F可以以优异的循环利用性多次重复使用。