In this study, the high silica ZSM‐5 carrier was modified with the iron species and applied as a heterogeneous electro‐Fenton (EF) catalyst for pharmaceutical pollutant degradation. The carrier was prepared by the hydrothermal method and followed by impregnation. The physicochemical properties were evaluated by field emission scanning electron microscopes (FE‐SEM), FT‐IR, X‐Ray diffraction (XRD), and N₂ adsorption–desorption techniques. The impregnated carrier had high crystallinity, high specific surface area, and uniform dispersion of iron species. The effect of different operating conditions was studied on the phenazopyridine (PHP) degradation efficiency. The optimal efficiency of PHP degradation (ca. 92.5%) was obtained at pH of 3.0, the current density of 100 mA, catalyst loading of 0.2 g L⁻¹, and T = 25°C. The data of kinetic showed that the degradation of PHP followed Pseudo‐First‐Order kinetic, including the high accuracy (R² > 0.95). The developed catalyst had the high stability and reusability for the PHP degradation in the EF process, while the degradation efficiency dropped only 0.5% for the regenerated catalyst.

中文翻译：

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铁改性沸石载体可在非均质电子芬顿中高效降解药物污染物：影响因素和动力学

在这项研究中，高二氧化硅ZSM-5载体经过了铁种类的修饰，并被用作非均相的电子芬顿（EF）催化剂，用于药物污染物的降解。通过水热法制备载体，然后进行浸渍。通过场发射扫描电子显微镜（FE‐SEM），傅立叶变换红外（IR），X射线衍射（XRD）和N ₂吸附-解吸技术对理化性质进行了评估。浸渍的载体具有高结晶度，高比表面积和铁种类的均匀分散。研究了不同操作条件对苯并吡啶（PHP）降解效率的影响。在pH为3.0，电流密度为100 mA，催化剂负载为0.2 g L ^{-1的条件下}，PHP的最佳降解效率（约92.5％）获得了，且T = 25°C。动力学数据表明，PHP的降解遵循伪一级动力学，包括高精度（R ²  > 0.95）。所开发的催化剂对EF工艺中的PHP降解具有很高的稳定性和可重复使用性，而再生催化剂的降解效率仅下降了0.5％。