Manganese oxide-loaded sludge-derived biochar (Mn-SDBC) was synthesized and used to activate persulfate (PS) for Orange G (OG) degradation. X-ray fluorescence and Fourier transform infrared spectroscopy analysis indicated that the manganese oxides were successfully loaded on the SDBC. The result of batch experiments suggests that OG can be efficiently degraded by PS activated by Mn-SDBC. Metal loading rate, biochar dosage and PS concentration play a crucial role in experiments, whereas pH has a minor effect on OG removal. The free radical quenching experiment was investigated to determine the predominant radical species, and the activation mechanism was also illustrated. The as-synthesized Mn-SDBC can efficiently activate PS and removal OG under a continuous flow condition in a fixed-bed column. Our study suggests that Mn-SDBC would be a promising catalyst for the remediation of dye-contaminated wastewater.

合成了负载氧化锰的污泥衍生的生物炭（Mn-SDBC），并用于活化过硫酸盐（PS）来降解橙G（OG）。X射线荧光和傅里叶变换红外光谱分析表明，锰氧化物已成功加载到SDBC上。批处理实验的结果表明，Mn-SDBC活化的PS可以有效降解OG。金属负载率，生物炭剂量和PS浓度在实验中起关键作用，而pH值对OG的去除影响较小。通过自由基猝灭实验确定了主要的自由基种类，并阐明了其激活机理。合成后的Mn-SDBC可以在固定床色谱柱中连续流动的条件下有效活化PS并除去OG。