Selective removal of oxytetracycline by molecularly imprinted magnetic biochar

Yuhan JIAO, Yunqiang YI, Zhanqiang FANG, Po Keung Eric TSANG

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1 Citation (Scopus)

Abstract

Molecularly imprinted magnetic biochar (MBC@MIPs) was synthesized through molecular imprinting precipitation polymerization. This material demonstrated a selective adsorption capacity of oxytetracycline (OTC) from water samples. Upon characterization of MBC@MIPs, results revealed the formation of a memory cavity shell layer on the magnetic biochar's surface, exhibiting a distinctive recognition effect alongside commendable magnetic and thermal stability. Analysis of the adsorption kinetics indicated that the OTC adsorption process aligned well with the pseudo-second-order rate equation, with chemisorption acting as the predominant mechanism for antibiotic adsorption onto MBC@MIPs. The data could be well described by the Langmuir isotherm model. At 299 K, MBC@MIPs showed a maximum binding capacity of 67.89 mg·g⁻¹, surpassing that of MBC (38.84 mg·g⁻¹) by 1.77 times. MBC@MIPs exhibited the highest selectivity towards OTC, with an imprinting factor (IF) of 5.64. Even amidst interference from antibiotics, MBC@MIPs maintained a significant adsorption capacity for OTC (6.10 mg·g⁻¹), with IF of 6.70. Copyright © 2024 Elsevier Ltd. All rights reserved.

Original languageEnglish
Article number130394
JournalBioresource Technology
Volume395
Early online dateFeb 2024
DOIs
Publication statusPublished - Mar 2024

Citation

Jiao, Y., Yi, Y., Fang, Z., & Tsang, P. E. (2024). Selective removal of oxytetracycline by molecularly imprinted magnetic biochar. Bioresource Technology, 395, Article 130394. https://doi.org/10.1016/j.biortech.2024.130394

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