Peracetic acid (PAA) was successfully activated by UV and Fe⁰ to degrade sulfamethazine (SMT) in this study. UV/Fe⁰/PAA system not only could enhance SMT removal efficiency but also could reduce the energy consumption in comparison with UV, Fe⁰/PAA and UV/PAA systems. The RO^• radical was the main radical for the degradation of SMT in UV/Fe⁰/PAA system and photolysis, ^•OH and R-O^• exhibited 15.6%, 17.6% and 66.8% contribution for SMT degradation, respectively. Fourier transform infrared spectroscopy (FTIR), Scanning Electron Microscope (SEM), and X-ray photoelectron spectroscopy (XPS) were conducted to investigate the characterization of Fe⁰ after reaction in UV/Fe⁰/PAA system. The possible SMT degradation pathway was also proposed. Affecting factors such as Fe⁰ dosage (0–0.2 g L⁻¹), PAA concentration (0–200 μM) and initial pH (3–9) were also studied. Cl⁻, NO₃^-, SO₄^2- and HCO₃^- had a negligible adverse effect on SMT removal in this system indicating the good adaptability to inorganic ions. In addition, UV/Fe⁰/PAA system had the good recycle ability of Fe⁰ and showed a good performance in removing antibiotic in the nature fresh water. Therefore, this study notably improved the knowledge of PAA activated by Fe⁰ and UV and showed the potential applicability of UV/Fe⁰/PAA system in degrading antibiotics in nature fresh water.

在本研究中，过氧乙酸 (PAA) 被紫外线和 Fe ⁰成功激活以降解磺胺二甲嘧啶 (SMT)。与UV、Fe ⁰ /PAA和UV/PAA系统相比，UV/Fe ⁰ /PAA系统不仅可以提高SMT去除效率，还可以降低能耗。将R Ô ^•自由基是为SMT的在UV / Fe的降解主要自由基⁰ / PAA系统和光解，^• OH和RO ^•表现出15.6％，17.6％和SMT降解分别66.8％的贡献。进行傅里叶变换红外光谱 (FTIR)、扫描电子显微镜 (SEM) 和 X 射线光电子能谱 (XPS) 以研究 Fe 的表征⁰在UV / Fe的反应后⁰ / PAA系统。还提出了可能的 SMT 降解途径。还研究了影响因素，例如 Fe ⁰剂量（0–0.2 g L ^-1）、PAA 浓度（0–200 μM）和初始 pH（3–9）。Cl ^-、NO ₃ ^-、SO ₄ ^2-和HCO ₃ ^-在该系统中对SMT去除的不利影响可以忽略不计，表明对无机离子具有良好的适应性。此外，UV/Fe ⁰ /PAA体系具有良好的Fe ⁰回收能力并在去除自然界淡水中的抗生素方面表现出良好的性能。因此，本研究显着提高了对Fe ⁰和UV激活PAA 的认识，并展示了UV/Fe ⁰ /PAA 系统在降解自然界淡水中抗生素的潜在适用性。