School of Chemistry and Environmental Science, Shaanxi University of Technology, Hanzhong 723001, China.
Molecules. 2023 Dec 14;28(24):8094. doi: 10.3390/molecules28248094.
The development of an efficient catalyst with excellent performance using agricultural biomass waste as raw materials is highly desirable for practical water pollution control. Herein, nano-sized, metal-decorated biochar was successfully synthesized with in situ chemical deposition at room temperature. The optimized BC-Cu (1:4) composite exhibited excellent peroxymonosulfate (PMS) activation performance due to the enhanced non-radical pathway. The as-prepared BC-Cu (1:4) composite displays a superior 99.99% removal rate for ciprofloxacin degradation (initial concentration 20 mg·L) within 40 min. In addition, BC-Cu (1:4) has superior acid-base adaptability (3.98~11.95) and anti-anion interference ability. The trapping experiments and identification of reactive oxidative radicals confirmed the crucial role of enhanced singlet oxygen for ciprofloxacin degradation via a BC-Cu (1:4)/PMS system. This work provides a new idea for developing highly active, low-cost, non-radical catalysts for efficient antibiotic removal.
利用农业生物质废料作为原料开发高效、性能优异的催化剂对于实际水污染控制是非常理想的。在此，采用室温原位化学沉积法成功制备了纳米级金属修饰的生物炭。优化后的 BC-Cu（1:4）复合材料由于增强了非自由基途径，表现出优异的过一硫酸盐（PMS）活化性能。所制备的 BC-Cu（1:4）复合材料在 40 分钟内对环丙沙星（初始浓度 20mg·L）的去除率达到 99.99%。此外，BC-Cu（1:4）具有优越的酸碱适应性（3.98~11.95）和抗阴离子干扰能力。捕获实验和活性氧化自由基的鉴定证实了增强单重态氧在 BC-Cu（1:4）/PMS 体系中环丙沙星降解中的关键作用。这项工作为开发高效、低成本、非自由基催化剂去除抗生素提供了新的思路。
