Nonradical-based peroxymonosulfate (PMS) activation has recently caught increasing attention due to its less susceptible to environmental interference in the complex water matrix, but the performance of activators still requires further development for efficient pollutants degradation in wastewater treatment. Herein, a novel Co-Ni bimetal oxide loaded biochar was fabricated to boost nonradical PMS activation for enhancing sulfamethoxazole (SMX) degradation. According to the results, the as-obtained catalyst exhibited excellent SMX degradation efficiency of 96.2% within 30 min through complete nonradical oxidation pathway (including both O and mediated electron transfer). Co was confirmed to be the active sites to generate O dominated nonradical pathway. The biochar acted as the porous material to achieve the electron transfer oxidation process, as well as Ni ensured sufficient electron transfer rate and bound Co active sites to prevent the leaching of metal ions. Meanwhile, the prepared Co-Ni bimetal oxide loaded biochar possessed a remarkable catalytic degradation durability in the complex water environment conditions and showed universality for various organic contaminants. This study offers a valuable clue on the rational design of novel catalyst to induce the nonradical pathway-based persulfate activation.

中文翻译：

---

通过生物炭负载的钴镍双金属氧化物促进非自由基基过一硫酸盐活化，有效降解磺胺甲恶唑


基于非自由基的过一硫酸盐（PMS）活化由于其在复杂水基质中不易受到环境干扰，最近引起了越来越多的关注，但活化剂的性能仍需要进一步开发，以有效降解废水处理中的污染物。在此，制备了一种新型钴镍双金属氧化物负载生物炭，以促进非自由基 PMS 活化，从而增强磺胺甲恶唑 (SMX) 降解。结果表明，通过完整的非自由基氧化途径（包括O2和介导的电子转移），所获得的催化剂在30分钟内表现出优异的SMX降解效率，达到96.2%。 Co被证实是产生O主导的非自由基途径的活性位点。生物炭作为多孔材料实现电子转移氧化过程，Ni保证了足够的电子转移速率并结合Co活性位点以防止金属离子的浸出。同时，制备的Co-Ni双金属氧化物负载生物炭在复杂的水环境条件下具有显着的催化降解耐久性，并对各种有机污染物表现出普适性。这项研究为合理设计新型催化剂以诱导基于非自由基途径的过硫酸盐活化提供了宝贵的线索。