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On the adsorption of tetracycline by calcined magnesium-aluminum hydrotalcites.
J Environ Qual. 2009 May-Jun; 38(3):1302-10.JE

Abstract

Exploiting effective sorbents for antibiotic adsorption is highly desirable for the elimination of ecological risks from antibiotic contamination. In this study, MgAl-CO(3)(2-) hydrotalcites with different Mg/Al molar ratios were prepared and tetracycline (TC) adsorption to the hydrotalcites and calcined hydrotalcites was investigated by batch experiments. Calcined hydrotalcites had higher adsorption capacities compared to MgAl-CO(3)(2-) hydrotalcites. At low TC equilibrium concentrations, calcined hydrotalcites with differing Mg/Al ratios showed approximately identical TC uptakes. However, at high tetracycline concentration, greater TC adsorption capacity was observed for calcined hydrotalcite having a high Mg/Al ratio (i.e., 4.4). X-ray diffraction (XRD) characterization showed the presence of Mg-Al oxide solid solution in TC -loaded calcined hydrotalcite, suggesting that suspension of the calcined product in water and adsorption of TC had led to only partial reconstruction of the layered structure. We hypothesize that TC was adsorbed on the MgO surface at high equilibrium concentrations. The behavior of TC adsorption on the calcined hydrotalcite was well described by a dual adsorption model. Kinetic analysis suggested that at low adsorption levels, TC adsorption by calcined hydrotalcite could be modeled by both a pseudo second-order kinetics model and a nucleation-growth model. The present work demonstrates that calcined hydrotalcites may be promising adsorbents for effective removal of TC from water resources.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Xu Z
State Key Lab. of Pollution Control and Resource Reuse, School of the Environment, Nanjing Univ., Nanjing 210093, China.
Fan J
No affiliation info available
Zheng S
No affiliation info available
Ma F
No affiliation info available
Yin D
No affiliation info available

MeSH

AdsorptionAluminum HydroxideAnti-Bacterial AgentsKineticsMagnesium HydroxideTetracyclineThermodynamicsWater Pollutants, Chemical

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19398528

Citation

Xu, Zhaoyi, et al. "On the Adsorption of Tetracycline By Calcined Magnesium-aluminum Hydrotalcites." Journal of Environmental Quality, vol. 38, no. 3, 2009, pp. 1302-10.
Xu Z, Fan J, Zheng S, et al. On the adsorption of tetracycline by calcined magnesium-aluminum hydrotalcites. J Environ Qual. 2009;38(3):1302-10.
Xu, Z., Fan, J., Zheng, S., Ma, F., & Yin, D. (2009). On the adsorption of tetracycline by calcined magnesium-aluminum hydrotalcites. Journal of Environmental Quality, 38(3), 1302-10. https://doi.org/10.2134/jeq2008.0246
Xu Z, et al. On the Adsorption of Tetracycline By Calcined Magnesium-aluminum Hydrotalcites. J Environ Qual. 2009 May-Jun;38(3):1302-10. PubMed PMID: 19398528.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - On the adsorption of tetracycline by calcined magnesium-aluminum hydrotalcites. AU - Xu,Zhaoyi, AU - Fan,Jie, AU - Zheng,Shourong, AU - Ma,Feifei, AU - Yin,Daqiang, Y1 - 2009/04/27/ PY - 2009/4/29/entrez PY - 2009/4/29/pubmed PY - 2009/6/19/medline SP - 1302 EP - 10 JF - Journal of environmental quality JO - J Environ Qual VL - 38 IS - 3 N2 - Exploiting effective sorbents for antibiotic adsorption is highly desirable for the elimination of ecological risks from antibiotic contamination. In this study, MgAl-CO(3)(2-) hydrotalcites with different Mg/Al molar ratios were prepared and tetracycline (TC) adsorption to the hydrotalcites and calcined hydrotalcites was investigated by batch experiments. Calcined hydrotalcites had higher adsorption capacities compared to MgAl-CO(3)(2-) hydrotalcites. At low TC equilibrium concentrations, calcined hydrotalcites with differing Mg/Al ratios showed approximately identical TC uptakes. However, at high tetracycline concentration, greater TC adsorption capacity was observed for calcined hydrotalcite having a high Mg/Al ratio (i.e., 4.4). X-ray diffraction (XRD) characterization showed the presence of Mg-Al oxide solid solution in TC -loaded calcined hydrotalcite, suggesting that suspension of the calcined product in water and adsorption of TC had led to only partial reconstruction of the layered structure. We hypothesize that TC was adsorbed on the MgO surface at high equilibrium concentrations. The behavior of TC adsorption on the calcined hydrotalcite was well described by a dual adsorption model. Kinetic analysis suggested that at low adsorption levels, TC adsorption by calcined hydrotalcite could be modeled by both a pseudo second-order kinetics model and a nucleation-growth model. The present work demonstrates that calcined hydrotalcites may be promising adsorbents for effective removal of TC from water resources. SN - 0047-2425 UR - https://www.unboundmedicine.com/medline/citation/19398528/On_the_adsorption_of_tetracycline_by_calcined_magnesium_aluminum_hydrotalcites_ L2 - https://doi.org/10.2134/jeq2008.0246 DB - PRIME DP - Unbound Medicine ER -