Journal
CHEMOSPHERE
Volume 237, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.124464
Keywords
Adsorption; Ferromanganese biochar; Levofloxacin; Adsorption mechanisms
Categories
Funding
- National Natural Science Foundation of China [51709103]
- National Key R&D Projects of China [2016YFC0403002]
- Natural Science Foundation of Hunan Province, China [2018E3242]
- China Postdoctoral Science Foundation [2018M630901]
- Training Program for Excellent Young Innovators of Changsha [kq1802020]
- Double First-Class Construction Project of Hunan Agricultural University [kxk201801005, SYL201802005]
- Hong Kong Scholars Program [XJ2018029]
- Undergraduate Science and Technology Fund Project of Hunan Agricultural University [2018ZK30]
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This present study reported the synthesis and characterization of a low-cost, environment friendly and high efficient biochar, ferromanganese modified biochar (Fe/Mn-BC) for the removal of levofloxacin (LEV) from aqueous medium. Fe/Mn-BC was synthesized through the facile co-precipitation of Fe, Mn with vinasse wastes and then pyrolysis under controlled conditions. The characterization of Fe/MnBC was analyzed by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction patterns (XPS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Raman. Some influencing factors (e.g., pH, Fe/Mn-BC dosage, initial LEV concentration, ionic strength, contact time and temperature) were comprehensively investigated. The results manifested that the adsorption process of LEV onto Fe/Mn-BC was high pH dependence and the maximum adsorption capacity was achieved at pH 5. Moreover, the adsorption capacity of LEV was increased with increasing ionic strength. To gain a clearer perspective on the adsorption behavior of LEV onto Fe/Mn-BC, the adsorption kinetics and isotherms were also performed, revealing pseudo-second-order and Freundlich model had a better fitting effect. Reusability experiments indicated that Fe/Mn-BC could maintain a certain adsorption capacity for LEV after 5 recycles. Overall, this work showed that Fe/Mn-BC was an effective and promising adsorbent for eliminating LEV from aqueous medium. (C) 2019 Elsevier Ltd. All rights reserved.
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