The nanoFe₃O₄-biochar (Fe₃O₄-BC) heterogeneous catalyst was synthesized by coprecipitation method and the mechanism of Fe₃O₄-BC/peroxymonosulfate (Fe₃O₄-BC/PMS) system adsorption and synergistic catalysis for the removal of bisphenol A (BPA) were studied. The effect of initial pH, Fe₃O₄-BC load, PMS concentration on the catalyst activity were systematically evaluated. The results showed the synergistic effect between BC and Fe₃O₄ can greatly improve the removal efficiency of BPA in the Fe₃O₄-BC/PMS system. BPA removal efficiency gained 100% in 90 min at pH 3.0 with PMS 5 mM, Fe₃O₄-BC load 2.0 g/L and BPA 20 mg/L. Sulfate radical (SO₄^•−) and hydroxyl radicals (^•OH) was determined as the reactive species in the Fe₃O₄-BC/PMS system, and SO₄^•− was the major reactive species. Fe₃O₄-BC remained high active and the iron loss was only 2.13 mg/L when the pH was 3.0 after five recycles, which indicates that Fe₃O₄-BC catalyst has a good reusability potential and practical applications.

所述nanoFe ₃ Ô ₄ -biochar（FE ₃ ö ₄ -BC）的非均相催化剂是通过共沉淀法和Fe的机理合成的₃ ö ₄ -BC /过氧单（铁₃ ö ₄ -BC / PMS）系统吸附和用于协同催化对双酚 A (BPA) 的去除进行了研究。系统地评估了初始 pH、Fe ₃ O ₄ -BC 负载、PMS 浓度对催化剂活性的影响。结果表明BC和Fe之间的协同效应₃ ö ₄可以大大提高BPA的在Fe的去除效率₃ ö ₄-BC/PMS 系统。在 PMS 5 mM、Fe ₃ O ₄ -BC 负载 2.0 g/L 和 BPA 20 mg/L 条件下，在 pH 3.0 条件下，BPA 去除效率在 90 分钟内提高了 100% 。硫酸根 (SO ₄ ^•- ) 和羟基自由基 ( ^• OH) 被确定为 Fe ₃ O ₄ -BC/PMS 系统中的反应物种，而 SO ₄ ^•-是主要的反应物种。Fe ₃ O ₄ -BC催化剂在 pH 3.0 循环 5 次后仍保持高活性，铁损仅为 2.13 mg/L，表明 Fe ₃ O ₄ -BC 催化剂具有良好的重复利用潜力和实际应用。