Iron Oxychloride (FeOCl) was prepared by partial thermal decomposition and was studied as a heterogeneous Fenton catalyst to degrade tetracycline (TC). SEM, XRD, XPS technology were used to characterize its performance. The influencing factors of TC degradation efficiency were studied, including pH value, H₂O₂ content, catalyst dosage and initial TC concentration. The results showed that under the optimal conditions, the degradation rate of 60 mg L⁻¹ TC reached 92.9% within 60 min of reaction. The degradation process follows a second-order kinetic equation. Compared with other iron-based catalysts, FeOCl exhibited better catalytic and degradation effects. Moreover, FeOCl/H₂O₂ system exhibited a wide pH range (from 3.0 to 7.0) for efficient degradation of TC and showed excellent stability and reusability. Meanwhile, based on the intermediates identified by HPLC-MS, two possible pathways for the degradation of TC were proposed. Further, the results of electron spin-resonance spectroscopy and radical quenching tests suggested that the ·OH formed in the FeOCl/H₂O₂ system was mainly responsible for the degradation of TC.

通过部分热分解制备氯氧化铁（FeOCl），并研究其作为非均相Fenton催化剂降解四环素（TC）的方法。SEM，XRD，XPS技术用于表征其性能。研究了TC降解效率的影响因素，包括pH值，H ₂ O ₂含量，催化剂用量和初始TC浓度。结果表明，在最佳条件下， 反应60min内60 mg L ^-1 TC的降解率达到92.9％。降解过程遵循二阶动力学方程。与其他铁基催化剂相比，FeOCl表现出更好的催化和降解效果。此外，FeOCl / H ₂ O ₂该系统的pH范围宽（3.0至7.0），可有效降解TC，并具有出色的稳定性和可重复使用性。同时，基于HPLC-MS鉴定的中间体，提出了两种降解TC的可能途径。此外，电子自旋共振光谱法和自由基猝灭试验的结果表明，在FeOCl / H ₂ O ₂系统中形成的·OH是导致TC降解的主要原因。