Biochar catalysts exhibit significant activity and stability, for the activation of sodium persulfate (SPS) and consequently the oxidation of organic contaminants. In this study, the influence of SPS on the physicochemical characteristics and catalytic activity of biochar was determined. Following intense treatment with high SPS concentration at high temperature the biochar samples were characterized and tested for the degradation of sulfamethoxazole (SMX) in water matrices. The SPS treatment was found to alter significantly the biochar’s surface by dissolving the inorganic deposits and part of the organic phase. SPS was also found to increase the specific surface area and to change the acidity / basicity of the biochar. Lengthy treatments reduce the catalytic activity, an effect attributed to the oxidation of surface carbon groups, while shorter treatments result in higher activity due to the high specific surface area, enrichment of the surface with carbon groups and limited oxidation of the biochar.

生物炭催化剂表现出显着的活性和稳定性，以活化过硫酸钠（SPS），从而氧化有机污染物。在这项研究中，确定了SPS对生物炭的理化特性和催化活性的影响。经过高温下高浓度SPS的强化处理后，对生物炭样品进行了表征，并测试了其在水基质中的磺胺甲恶唑（SMX）的降解。发现通过溶解无机沉积物和部分有机相，SPS处理可显着改变生物炭的表面。还发现SPS可增加比表面积并改变生物炭的酸度/碱度。长时间的处理会降低催化活性，这归因于表面碳基团的氧化，