Boron was used as an environmentally friendly and efficient reductant to accelerate the recycle of Fe²⁺ enhancing peroxymonosulfate (PMS) activation for sulfamethazine (SMT) degradation. The SMT removal was only 28.1% within 30 min in Fe²⁺/PMS system while SMT removal could reach to 98.9% within only 3 min in Boron/Fe²⁺/PMS (B/Fe²⁺/PMS). Electron paramagnetic resonance spectroscopy (EPR) tests, quantitative detection and radical quenching experiments illustrated that OH and SO₄⁻ played important role and Fe(IV), ¹O₂ and O₂⁻ also participated in SMT removal. The addition of boron could enhance the role of OH and SO₄⁻ in SMT removal in Fe²⁺/PMS system. X-ray photoelectron spectroscopy (XPS), electrochemical tests and density functional theory (DFT) calculation were conducted to confirm the mechanism of boron for accelerating the recycle of Fe²⁺. Possible SMT degradation pathway was proposed. B/Fe²⁺/PMS process could efficiently remove SMT at low Fe²⁺ dosage and neutral pH. B/Fe²⁺/PMS system also exhibited a superior resistance to inorganic ions and nature organic matters. Moreover, B/Fe²⁺/PMS system had good applicability to different pollutants, excellent reusability for antibiotics removal, and efficient performance for removing antibiotics in nature fresh water. The results compared with others’ works also demonstrated the present study process was a promising strategy for antibiotics removal.

硼被用作一种环境友好且高效的还原剂，以加速 Fe ²⁺的循环，增强过氧单硫酸盐 (PMS) 的活化以降解磺胺二甲嘧啶 (SMT)。^{Fe 2+} /PMS体系在30分钟内SMT去除率仅为28.1%，而在Boron/Fe ²⁺ /PMS (B/Fe ²⁺ /PMS)中，SMT去除率仅在3分钟内达到98.9% 。电子顺磁共振光谱（EPR）测试、定量检测和自由基猝灭实验表明，OH和SO ₄ ^-起重要作用，Fe(IV)、¹ O ₂和O ₂ ^-还参与了 SMT 拆除。添加硼可以增强OH 和SO ₄ ^-在Fe ²⁺ /PMS 系统中SMT 去除中的作用。通过X射线光电子能谱(XPS)、电化学测试和密度泛函理论(DFT)计算，证实了硼加速Fe ²⁺循环的机理。提出了可能的 SMT 降解途径。B/Fe ²⁺ /PMS工艺可以在低Fe ²⁺用量和中性pH下有效去除SMT。B/Fe ²⁺ /PMS体系对无机离子和自然有机物也表现出优异的抵抗力。此外，B/Fe ²⁺/PMS系统对不同污染物具有良好的适用性，对抗生素去除的重复使用性好，对自然界淡水中的抗生素去除效果好。与其他人的工作相比，结果也表明本研究过程是一种有前途的抗生素去除策略。