The reuse of sewage sludge is still a challenging issue for wastewater treatment plants. In this study, a composite catalyst (FeOCl-SBC) was innovatively synthesized to activate peroxymonosulfate (PMS) to degrade organic pollutants in wastewater, which was obtained by sludge-derived biochar (SBC) modified by iron oxychloride (FeOCl). The addition of FeOCl triggered the increase of carbonyl groups (CO) on biochar, which promoted the generation of reactive oxygen species (ROS) and accelerated the catalytic rate. Compared with SBC/PMS (0.0993 min⁻¹) and FeOCl/PMS (0.0215 min⁻¹) systems, the kinetic reaction rates of FeOCl-SBC/PMS (0.2107 min⁻¹) for organic pollutants were increased by 2.1 and 9.8 times, respectively. FeOCl-SBC/PMS system had a wide pH range (3–9) and maintained 85% removal rate after 10 cycles. CO groups and Fe species (Fe³⁺/Fe²⁺) played an important role in the generation of singlet oxygen (¹O₂) and superoxide radical (O₂^•-) in FeOCl-SBC/PMS system. This work provides a viable strategy for the resource utilization of sludge and efficient treatments of organic wastewater.

对于污水处理厂来说，污水污泥的再利用仍然是一个具有挑战性的问题。本研究创新性地合成了一种复合催化剂（FeOCl-SBC）来活化过硫酸盐（PMS）以降解废水中的有机污染物，该催化剂是由三氯氧化铁（FeOCl）改性的污泥衍生生物炭（SBC）获得的。FeOCl的加入引发了生物炭上羰基（CO）的增加，促进了活性氧（ROS）的产生并加快了催化速率。与 SBC/PMS (0.0993 min ^-1 ) 和 FeOCl/PMS (0.0215 min ^-1 ) 系统相比，FeOCl-SBC/PMS (0.2107 min ^-1 ) 的动力学反应速率) 的有机污染物分别增加了 2.1 和 9.8 倍。FeOCl-SBC/PMS 系统具有较宽的 pH 值范围 (3-9)，并在 10 个循环后保持 85% 的去除率。Ç Ò基和Fe物质（铁³⁺ / Fe的²⁺）中的单线态氧（的产生起到了重要作用¹ Ò ₂）和超氧自由基（O ₂ ^{- •}在FeOCl-SBC / PMS系统）。这项工作为污泥资源化利用和有机废水的有效处理提供了可行的策略。