Rapid activation of sodium persulfate (SPS) for the degradation of C.I. Reactive Red 218 (RR218) was achieved using Ti₃C₂ MXene reduction of trace Fe³⁺. The degradation rate of RR218 reached 97.7% using a mixture containing 3 g L⁻¹ of SPS, 3.35 mg L⁻¹ of Fe³⁺ and 60 mg L⁻¹ of MXene stirred at 25 °C for 30 min. The intense reduction of Ti₃C₂ MXene triggers the Fe³⁺/Fe²⁺ cycle thereby accelerating the activation of SPS. When reactive dyes were degraded by Fe³⁺/SPS/MXene process, ·OH played a major role. The dye degradation capacity of the Fe³⁺/SPS/MXene process decreased after 5 cycles of recycling. In addition, the wastewater treated under these conditions resulted in high dyeing efficiencies in reuse experiments. This study not only improves the understanding of the catalytic reaction of MXene but also provides a wastewater treatment and reuse process with low metal consumption and high efficiency.

_{使用 Ti 3} C ₂ MXene 还原痕量 Fe ³⁺实现过硫酸钠 (SPS) 的快速活化以降解 CI 活性红 218 (RR218) 。使用含有3 g L ^-1 SPS、3.35 mg L ^-1 Fe ³⁺和60 mg L ^-1 MXene的混合物在25℃下搅拌30分钟，RR218的降解率达到97.7%。 Ti ₃ C ₂ MXene的强烈还原触发了 Fe ³⁺ /Fe ²⁺循环，从而加速了 SPS 的激活。当Fe ³⁺ /SPS/MXene 工艺降解活性染料时，·OH 起主要作用。 Fe ³⁺ /SPS/MXene工艺的染料降解能力在循环5次后下降。此外，在这些条件下处理的废水在回用实验中具有较高的染色效率。该研究不仅提高了对MXene催化反应的认识，而且提供了一种低金属消耗、高效率的废水处理和回用工艺。