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Comparative study on characteristics and mechanism of levofloxacin adsorption on swine manure biochar

Wang Z, Jang HM

Bioresource technology, 2022

71 citations

Abstract

This study aimed to evaluate the relationship between pyrolysis temperature (300-900 ℃), characteristics of swine manure (SM)-derived biochar (BC), and adsorption of levofloxacin (LEV) on SM-derived BC. The surface structure and chemistry of SM-derived BCs were characterized using Brunauer-Emmett-Teller analysis, scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy. According to the characteristic analysis, the surface area and graphitization degree of SM-derived BC increased with increasing temperature. The highest adsorption capacity was achieved by BC-900 (158 mg/g), which was higher than that in previous studies and comparable to that of commercial activated carbons. Characterization and adsorption experiment results indicated that pore-filling, π-π stacking interaction, π-π electron donor-acceptor, H-bonding, and hydrophobic interactions play a critical role in the adsorption of LEV on SM-derived BC. Collectively, this study provides information on the potential application of SM-derived BC in the removal of antibiotics.

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