期刊
BIORESOURCE TECHNOLOGY
卷 340, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.125698
关键词
Biochar; ferrite composites; Levofloxacin removal; Adsorption; Mechanism; Wastewater treatment
资金
- National Natural Science Foundation of China [51709103]
- Postdoctoral Science Foundation [2018M630901]
- Hong Kong Scholars Program [XJ2018029]
- Natural Science Foundation of Hunan Province, China [2018JJ3242]
- Training Program for Excellent Young Innovators of Changsha [kq1802020]
A magnetic biochar composite derived from pomelo peel was successfully used for Levofloxacin adsorption, with adsorption behavior and mechanisms investigated. Results showed that adsorption was significantly influenced by pyrolysis temperature, with a maximum adsorption capacity of 115 mg g-1. The adsorption process was found to be spontaneous and endothermic.
The limitation of low efficiency and complicated separation after adsorption make the practical application of biochar a huge challenge. Here, one pomelo peel-derived magnetic biochar composite, biochar supported MgFe2O4 (BMF) was fabricated and adopted for Levofloxacin (LFX) adsorption. Adsorption behaviors and mechanisms were investigated by characterization analysis, batch experiments, and data modeling. Results indicated that adsorption could be strikingly influenced by pyrolysis temperature. Adsorption kinetic was well fitted by pseudo-second-order model. Adsorption isotherm was best fitted with Freundlich model. The maximum adsorption capacity was 115 mg g-1. Moreover, hydrophobic effect played a limited contribution according to dual-mode model analysis. LFX adsorption was spontaneous and endothermic. Adsorption mechanisms were ascribed to electrostatic interactions, H-bonding, functional groups complexation, and 7C-7C electron donor-acceptor interactions. Besides that, BMF had the potential for repeated use. This research proposed a novel and promising method for LFX or other antibiotics adsorption removal.
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