Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcis.2010.10.065
Title: Application of nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, UV-Visible spectroscopy and kinetic modeling for elucidation of adsorption chemistry in uptake of tetracycline by zeolite beta
Authors: Kang, J.
Liu, H.
Zheng, Y.-M. 
Qu, J.
Chen, J.P. 
Keywords: Adsorption
Antibiotic
FTIR
Kinetic modeling
NMR
Tetracycline
Zeolite beta
Issue Date: 1-Feb-2011
Source: Kang, J., Liu, H., Zheng, Y.-M., Qu, J., Chen, J.P. (2011-02-01). Application of nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, UV-Visible spectroscopy and kinetic modeling for elucidation of adsorption chemistry in uptake of tetracycline by zeolite beta. Journal of Colloid and Interface Science 354 (1) : 261-267. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2010.10.065
Abstract: Extensive usage of tetracycline has resulted in its contamination in surface water and groundwater. The adsorption of tetracycline on zeolite beta was systematically investigated for the decontamination of the antibiotic polluted water in this study. Ninety percent of uptake by the zeolite beta occured in 0.25. h, and the adsorption equilibrium was obtained within 3. h, which was well described by an intraparticle diffusion model. The adsorption generally increased when pH was increased from 4.0 to 5.0, and then decreased significantly as the pH was further increased, which was caused by the pH-dependent speciation of tetracycline and surface charge of zeolite beta. Both Freundlich and Langmuir equations well described the adsorption isotherm. A thermodynamic analysis showed that the sorption process was spontaneous and endothermic. Aluminum atoms in the zeolite played a crucial role in the uptake; the adsorption increased with the increasing aluminum content in zeolite. The UV-Visible spectroscopy study showed that the spectra of tetracycline changed upon the interaction with zeolite beta, which could be ascribed to the formation of complexes of tetracycline and aluminum atoms in the zeolite surface. Nuclear magnetic resonance spectroscopy study further confirmed the participation of Al in the tetracycline adsorption. Fourier transform infrared spectroscopy studies showed that the amino functional groups in tetracycline were involved in the complexation with the zeolite surface. © 2010 Elsevier Inc.
Source Title: Journal of Colloid and Interface Science
URI: http://scholarbank.nus.edu.sg/handle/10635/58957
ISSN: 00219797
DOI: 10.1016/j.jcis.2010.10.065
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