Photocatalytic degradation of Amitraz insecticide in a heterogeneous phase was studied at neutral pH using several types of metals supported on chitosan beads (Fe‐CS, Fe₃O₄‐CS, Mn‐CS, MnO₂‐CS, and TiO₂‐CS). Scanning Electron Microscopy (SEM), X‐Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), and Brunauer Emmett Teller (BET) analysis were used to characterize the prepared catalysts. Parameters, including the type of catalyst, UV irradiation, the method of hydrogen peroxide addition, and the presence of dissolved oxygen were investigated in order to evaluate the performance of the heterogeneous Fenton process. The optimal conditions were achieved when using 1 g L⁻¹ of Fe₃O₄‐CS catalyst under UV irradiation with the sequential addition of 12 mM of H₂O₂ and a continuous bubbling of air in the reactional medium. The degradation of the pollutant follows a pseudo‐first‐order kinetic. The catalyst stability was evaluated and confirmed in four repeated runs with a control of the amount of leached iron in the aqueous solution.

中文翻译：

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使用壳聚糖微珠负载的金属通过非均相UV-芬顿工艺去除Amitraz杀虫剂

在非均相双甲脒杀虫剂的光催化降解，使用支撑在聚氨基葡糖珠几种类型的金属在中性pH的研究（铁-CS，铁₃ ö ₄ -CS，锰-CS，的MnO ₂ -CS和TiO ₂ -CS） 。使用扫描电子显微镜（SEM），X射线衍射（XRD），傅立叶变换红外（FTIR）和Brunauer Emmett Teller（BET）分析来表征制备的催化剂。为了评估非均相Fenton工艺的性能，研究了包括催化剂类型，UV辐射，过氧化氢的添加方法和溶解氧的存在在内的参数。当使用1 g L ^-1的Fe ₃ O时达到了最佳条件_4‐ CS催化剂在紫外线照射下，依次添加12 mM H ₂ O ₂并在反应介质中连续鼓泡空气。污染物的降解遵循伪一级动力学。通过控制水溶液中浸出铁的量，在四次重复运行中评估并确认了催化剂的稳定性。