Recently, biochar was frequently applied in catalysis field, and it has been regarded as an efficient carbon-rich material to degrade organic pollutants in water. Various functional structures of biochar (such as pore structure, oxygen-containing groups and, defects) have been reported to be valid in catalysis. Whereas the complexity of biochar structure and composition hinders the further exploration of specific functions of biochar. To address this problem, selective inactivation experiment was first involved to investigate the role of oxygen-containing groups in catalysis. In this study, swine bone derived biochar (BBC) was adopt as catalyst in persulfate (PS) activation system to degrade acetaminophen (ACT). Both non-radical and radical pathway worked in BBC/PS system. ACT could be completely degraded in 60 min, and the removal rate could reach 0.3111 min⁻¹. The results showed that the ketone groups on the BBC were the primary active sites of PS/BBC system and it played a major role in non-radical pathway (electron transfer pathway), and it might act as the active sites to produce OH in BBC/PS system. Besides, the COOH and OH on BBC might be beneficial to radical pathway, which can help to generate OH and SO₄⁻. Interestingly, residual hydroxyapatite and defects in BBC might be able to stimulate PS to produce O₂⁻ and ¹O₂. With the development of increasingly precise biochar synthesis techniques, these verdicts give evidence to further oriented synthesis of biochar.

近年来，生物炭被广泛应用于催化领域，并被认为是降解水中有机污染物的有效富碳材料。据报道，生物炭的各种功能结构（例如孔结构，含氧基团和缺陷）在催化中是有效的。然而，生物炭结构和组成的复杂性阻碍了对生物炭特定功能的进一步探索。为了解决该问题，首先涉及选择性灭活实验以研究含氧基团在催化中的作用。在这项研究中，猪骨衍生生物炭（BBC）被用作过硫酸盐（PS）活化系统中的催化剂，以降解对乙酰氨基酚（ACT）。非自由基途径和激进途径均在BBC / PS系统中起作用。ACT可能会在60分钟内完全降解，^-1。结果表明，BBC上的酮基是PS / BBC系统的主要活性位点，在非自由基途径（电子转移途径）中起主要作用，并且可能是BBC中产生OH的活性位点/ PS系统。此外，COOH和OH对BBC可能是激进的途径，它可以帮助产生有益的OH和SO ₄ ^- 。有趣的是，残留的羟基磷灰石和缺陷BBC可能能够刺激PS以产生ö ₂ ^-和¹ Ò ₂。随着越来越精确的生物炭合成技术的发展，这些结论为生物炭的进一步定向合成提供了证据。