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

作者: Jin Kang , Huijuan Liu , Yu-Ming Zheng , Jiuhui Qu , J. Paul Chen

DOI: 10.1016/J.JCIS.2010.10.065

关键词:

摘要: Abstract Extensive usage of tetracycline has resulted in its contamination surface water and groundwater. The adsorption on zeolite beta was systematically investigated for the decontamination antibiotic polluted this study. Ninety percent uptake by occured 0.25 h, equilibrium obtained within 3 h, which well described an intraparticle diffusion model. generally increased when pH from 4.0 to 5.0, then decreased significantly as further increased, caused pH-dependent speciation charge beta. Both Freundlich Langmuir equations isotherm. A thermodynamic analysis showed that sorption process spontaneous endothermic. Aluminum atoms played a crucial role uptake; with increasing aluminum content zeolite. UV–Visible spectroscopy study spectra changed upon interaction beta, could be ascribed formation complexes surface. Nuclear magnetic resonance confirmed participation Al adsorption. Fourier transform infrared studies amino functional groups were involved complexation

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