Beijing International Scientific and Technological Cooperation Base of Water Pollution Control Techniques for Antibiotics and Resistance genes, School of Civil Engineering, Beijing Jiaotong University, 3 Shangyuancun, Beijing, 100044, PR China.
School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia.
Environ Res. 2021 Jan;192:110261. doi: 10.1016/j.envres.2020.110261. Epub 2020 Sep 28.
The question of how to reasonably dispose and recycle antibiotic mycelial residues (AMRs), a hazardous waste, is a critical issue. The AMRs containing nitrogen-rich organic matters shows a promising alternative feedstock of nitrogen-doped porous carbons (NPCs). Here, the NPCs with the ultrahigh surface area (2574.9 m g) were prepared by using the discarded oxytetracycline mycelial residues (OMRs) and further used as an electrode for supercapacitor. A series of experiments including scanning/transmission electron microscope, Brunauer-Emmett-Teller measurement, and electrochemical impedance spectrum revealed that the NPC-2-900 exhibited a high N content, large surface area, and high electrical conductivity. The electrochemical performance of the NPC was tested by cyclic voltammetry, galvanostatic charge/discharge cycling, and rate capability test. The optimized NPC-2-900 displayed distinguish specific capacitance (307 F g), cycling stability (over 95% capacitance retention after 2000 cycles even at a high current density of 20 A g) and superior rate performance. Of particular interest, the qPCR test indicates the ARGs were reduced in the conversion process from OMRs to NPCs.
如何合理处置和回收抗生素菌丝体残留物（AMRs）这一危险废物是一个关键问题。含有丰富氮源有机物的 AMRs 是一种很有前途的氮掺杂多孔碳（NPCs）的替代原料。在这里，使用废弃的土霉素菌丝体残留物（OMRs）制备出具有超高比表面积（2574.9 m g）的 NPCs，并进一步用作超级电容器的电极。一系列实验，包括扫描/透射电子显微镜、BET 测量和电化学阻抗谱，表明 NPC-2-900 具有高氮含量、大表面积和高电导率。通过循环伏安法、恒流充放电循环和倍率性能测试来测试 NPC 的电化学性能。优化后的 NPC-2-900 表现出出色的比电容（307 F g）、循环稳定性（即使在 20 A g 的高电流密度下，2000 次循环后电容保持率仍超过 95%）和优异的倍率性能。特别值得注意的是，qPCR 测试表明，在从 OMRs 到 NPCs 的转化过程中，ARGs 减少了。
