In this study, syderolite (Sd) pellets loaded with bimetallic oxides (Sd-Ni-Co) catalyst was prepared for the first time, which was used to activate peroxymonosulfate (PMS) for the degradation of Brominobenzonitrile (BMN). The effects of the Sd-Ni-Co dose, PMS dose, pH value, BMN concentration, and different anions on the degradation experiment were explored. The optimal reaction conditions for the degradation of 50 mg/L BMN were 100 g/L Sd-Ni-Co and 0.2 g/L of PMS, and the degradation was complete at room temperature within 40 min. The ten continuous cycle test shows the perfect structural stability of Sd-Ni-Co. Sd-Ni-Co/PMS system not only shows a good degradation performance on BMN but also on other organics, indicating that the method has a good universality. The radical quenching experiments (ethanol and tert-butanol) show that both •OH and SO₄^-·play an important role in this reaction system, and further confirmed the result by electron paramagnetic resonance (EPR) spectra. The Sd-Ni-Co was characterized by SEM, XRD, XPS, and BET. The degradation process was analyzed by triple quadrupole liquid chromatography-mass spectrometry (LC-MS), and the possible degradation pathway and mechanism were proposed.

本研究首次制备负载双金属氧化物（Sd-Ni-Co）催化剂的syderolite（Sd）球团，用于活化过氧单硫酸盐（PMS）降解溴代苄腈（BMN）。探讨了Sd-Ni-Co剂量、PMS剂量、pH值、BMN浓度和不同阴离子对降解实验的影响。50 mg/L BMN降解的最佳反应条件为100 g/L Sd-Ni-Co和0.2 g/L PMS，室温下40 min内降解完成。十次连续循环测试表明 Sd-Ni-Co 具有完美的结构稳定性。Sd-Ni-Co/PMS体系不仅对BMN表现出良好的降解性能，对其他有机物也表现出良好的降解性能，表明该方法具有良好的普适性。自由基猝灭实验（乙醇和叔丁醇）表明 •OH 和 SO₄ ^- ·在该反应体系中起重要作用，并通过电子顺磁共振(EPR)光谱进一步证实了该结果。采用 SEM、XRD、XPS 和 BET 对 Sd-Ni-Co 进行了表征。采用三重四极杆液相色谱-质谱（LC-MS）对降解过程进行分析，提出了可能的降解途径和机理。