This study aimed to explore the catalytic performance of CTAB-modified α-FeOOH/kaolinite material (C-α-FeOOH/K) and investigate the energetic effect of kaolinite on the structure of synthesized composite. The highly efficient C-α-FeOOH/K catalyst was prepared by a one-step hydrothermal method and its efficiency in activating peroxymonosulfate (PMS) for the removal of benzo[a]pyrene (B[a]p) was evaluated. It was found that the C-α-FeOOH/K material exhibited excellent performance to activate PMS for B[a]p degradation with 91 % removal percentage within 15 min. Meanwhile, the removal percentage of B[a]p by the C-α-FeOOH/K/PMS system was 1.35 and 1.73 times higher than that of the C-α-FeOOH/PMS and α-FeOOH/PMS system, respectively. Furthermore, ^•OH, SO₄^•−, O₂^•− and ¹O₂ were detected through radical quenching experiments and electron spin experiments (EPR). Finally, potential degradation pathways of B[a]p were inferred based on liquid chromatography-mass spectrometry (LC-MS). This research not only broadens the application of non-metallic minerals in environmental remediation, but also provides novel insights into the degradation mechanism of B[a]p and wastewater treatment.

本研究旨在探讨CTAB改性α-FeO​​OH/高岭石材料（C-α-FeO​​OH/K）的催化性能，并研究高岭石对合成复合材料结构的能量影响。通过一步水热法制备了高效C-α-FeO​​OH/K催化剂，并评估了其活化过一硫酸盐（PMS）去除苯并[a]芘（B[a]p）的效率。结果发现，C-α-FeO​​OH/K 材料表现出优异的激活 PMS 降解 B[a]p 的性能，15 分钟内去除率达到 91%。同时，C-α-FeO​​OH/K/PMS系统对B[a]p的去除率分别是C-α-FeO​​OH/PMS和α-FeO​​OH/PMS系统的1.35和1.73倍。此外，^· OH、SO ₄ ^•−、O ₂通过自由基猝灭实验和电子自旋实验(EPR)检测到了^•−和¹ O _{2 。}最后，基于液相色谱-质谱法（LC-MS）推断了 B[a]p 的潜在降解途径。该研究不仅拓宽了非金属矿物在环境修复中的应用，而且为B[a]p的降解机制和废水处理提供了新的见解。