One-step solvothermal synthesis of magnetic Fe3O4-graphite composite for Fenton-like degradation of levofloxacin

A novel Fe 3 O 4 -graphite composite was prepared, characterized, and investigated as a heterogeneous Fenton-like catalyst for the degradation of levofloxacin (LEV) in an aqueous solution. The results revealed that the Fe 3 O 4 -graphite composite exhibited excellent properties for the degradation a...

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Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2016-01, Vol.51 (1), p.52-62
Main Authors: Wang, Long, Zhao, Qi, Hou, Juan, Yan, Jin, Zhang, Fengshuang, Zhao, Jiahui, Ding, Hong, Li, Yi, Ding, Lan
Format: Article
Language:English
Subjects:
Environmental Restoration and Remediation - methods
Fenton-like degradation
Ferric Compounds - metabolism
Graphite - metabolism
graphite composite
Levofloxacin
Levofloxacin - metabolism
solvothermal synthesis
Waste Water - chemistry
Water Pollutants, Chemical - metabolism
Water Purification - methods
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Summary:A novel Fe 3 O 4 -graphite composite was prepared, characterized, and investigated as a heterogeneous Fenton-like catalyst for the degradation of levofloxacin (LEV) in an aqueous solution. The results revealed that the Fe 3 O 4 -graphite composite exhibited excellent properties for the degradation and mineralization of LEV, achieving a nearly complete degradation of 50 mg L −1 LEV in 15 min and 48% of total organic carbon removal in 60 min under optimal conditions. A large electronic conjugation structure exists in graphite, which may lead to the fast production of *OH radical species because of the easy reduction of Fe(III) to Fe(II). In addition, we observed that the graphite can degrade LEV in the presence of H 2 O 2 . Therefore, the synergistic results of the graphite structure and Fe 3 O 4 magnetic nanoparticles (MNPs) may contribute to the high catalytic activity of the Fe 3 O 4 -graphite composite. Compared with pure Fe 3 O 4 MNPs, lesser iron leaching of the Fe 3 O 4 -graphite composite was observed during the degradation of LEV. The degradation efficiency of LEV remained approximately 80% at the fifth recycling run, which indicates that the Fe 3 O 4 -graphite composite has potential applications in water treatment for removing organic pollutants.
ISSN:1093-4529
1532-4117
DOI:10.1080/10934529.2015.1079112