Efficient Removal of Tetracycline by Metal–Organic Framework ZIF-67 and Its Mechanism

The widespread use of tetracycline (TC) poses potential hazards to ecosystems and human health. In this study, ZIF-67 was successfully synthesized using a room-temperature static synthesis method and applied to the efficient removal of TC from water. It was shown that the maximum adsorption of TC by...

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Bibliographic Details
Published in:Separations
Main Authors: Shengyang Zheng, Yaping Xu, Xu Yao, Chenzhe Wang, Ping Liu, Haitao Zhao, Jianbing Lu, Jing Ju
Format: Article
Language:English
Published: MDPI AG 2024-02-01
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Online Access:https://www.mdpi.com/2297-8739/11/2/63
Description
Summary:The widespread use of tetracycline (TC) poses potential hazards to ecosystems and human health. In this study, ZIF-67 was successfully synthesized using a room-temperature static synthesis method and applied to the efficient removal of TC from water. It was shown that the maximum adsorption of TC by ZIF-67 could reach 1583.128 mg·g<sup>−1</sup> at pH = 5.0, an initial TC concentration of 450 mg·g<sup>−1</sup>, an adsorption time of 720 min, and a temperature of 308K.The pseudo-second-order kinetic model and Langmuir’s isothermal adsorption model could describe the adsorption process better, which proved that the adsorption of ZIF-67 on TC was mainly monolayer adsorption dominated by chemisorption. Mechanistic studies showed that the adsorption process of ZIF-67 on TC was mainly through electrostatic interactions, pore adsorption, π–π interactions, and framework coordination of ZIF-67 surface cations with TC.
ISSN:2297-8739