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Synthesis of invasive plant biochar catalyst with carbon nitride structure for peroxymonosulfate activation toward efficient ciprofloxacin degradation
Lu, Yu-Wei1,2,3; Fan, Yu-Han1,3; Chen, Ming1,3
2024-04-01
摘要In this work, an invasive plant (Aster subulatus Michx) mesopore laminar biochar loaded with transition metal Co (CoS@MLBC) was synthesized by a one-step hydrothermal carbonization way for activating peroxymonosulfate (PMS) to remove antibiotics in water. We characterized the structure and morphology of CoS@MLBC and tested its performance. The results showed that the carbon nitride structure was formed on CoS@MLBC, which improved its adsorption capacity for antibiotics and PMS. In addition, Co-doping significantly enhanced the PMS activity and efficiently degraded ciprofloxacin (CIP) over a wide pH range. It was identified that radical and non-radical synergistic action had a critical effect on the CIP degradation process. Furthermore, CoS@MLBC could completely remove CIP within 10 min and had a high removal efficiency (98%) after four cycles. Three possible pathways of the CIP degradation process with 12 intermediates were proposed and their ecotoxicity was analyzed. This work provides a new perspective for preparing biochar from invasive plants for the degradation of antibiotics in water, realizing the concept of "treating the wastes with wastes". A novel catalyst CoS@MLBC with the carbon nitride structure was synthesized. center dot OH, SO4 center dot- and 1O2 were the main active species in the ciprofloxacin degradation process. Twelve intermediates were qualitatively determined and identified.
关键词Invasive plant-derived biochar Carbon nitride structure Peroxymonosulfate
DOI10.1007/s42773-024-00325-2
发表期刊BIOCHAR
ISSN2524-7972
卷号6期号:1页码:17
通讯作者Chen, Ming(chenming@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:001195234000001
语种英语