Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Joint International Research Laboratory of Biomass Energy and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
School of Engineering, Edith Cowan University, Joondalup, WA 6027, Australia.
Int J Environ Res Public Health. 2022 Nov 10;19(22):14805. doi: 10.3390/ijerph192214805.
The Persulfate-based advanced oxidation process is the most efficient and commonly used technology to remove organic contaminants in wastewater. Due to the large surface area, unique electronic properties, abundant N functional groups, cost-effectiveness, and environmental friendliness, N-doped biochars (NBCs) are widely used as catalysts for persulfate activation. This review focuses on the NBC for oxidative degradation of organics-contaminated wastewater. Firstly, the preparation and modification methods of NBCs were reviewed. Then the catalytic performance of NBCs and modified NBCs on the oxidation degradation of organic contaminants were discussed with an emphasis on the degradation mechanism. We further summarized the detection technologies of activation mechanisms and the structures of NBCs affecting the PS activation, followed by the specific role of the N configuration of the NBC on its catalytic capacity. Finally, several challenges in the treatment of organics-contaminated wastewater by a persulfate-based advanced oxidation process were put forward and the recommendations for future research were proposed for further understanding of the advanced oxidation process activated by the NBC.
过硫酸盐高级氧化技术是去除废水中有机污染物最有效和最常用的技术。由于具有较大的比表面积、独特的电子特性、丰富的 N 官能团、高性价比和环境友好性，N 掺杂生物炭（NBC）被广泛用作过硫酸盐激活的催化剂。本综述重点介绍了 NBC 用于氧化降解有机污染物废水。首先，综述了 NBC 的制备和改性方法。然后，讨论了 NBC 和改性 NBC 对有机污染物氧化降解的催化性能，重点讨论了降解机制。我们进一步总结了激活机制的检测技术和 NBC 结构对 PS 激活的影响，随后讨论了 NBC 的 N 构型对其催化能力的具体作用。最后，提出了过硫酸盐高级氧化技术处理有机污染物废水的几个挑战，并为进一步了解 NBC 激活的高级氧化技术提出了未来研究的建议。
