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Preparation of Adsorbent CeO2-TiO2 and Enhanced Adsorptive Removal of Tetracycline


Affiliations
1 Department of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
 

In order to enhance the adsorption performance of TiO2, CeO2 was tentatively introduced into the matrix of TiO2 by sol-gel method. The prepared adsorbent CeO2-TiO2 was used for the efficient adsorptive removal of antibiotics tetracycline (TC). It was observed that the introduction of CeO2 into TiO2 matrix has improved the removal efficiency of TC by 57.6% compared to pure TiO2. The uptake of TC was highly dependent on the solution pH conditions and the highest uptake of TC occurred under alkaline condition. Linear simulation method failed to discern which kinetic model was better to describe the kinetic data between pseudo-first-order and pseudo-second-order models. By nonlinear simulation, Elovich kinetic model was found to be the best model to describe the TC adsorption onto CeO2-TiO2, indicating that the pronounced diffusion-control process was the rate-determining step. The maximal adsorption capacity of the prepared sorbent was 59.3 mg/g using Langmuir isotherm model at 298 K. The uptake of TC increased with an increase in the reaction temperature, which demonstrates that the adsorption of TC was endothermic.

Keywords

CeO2-TiO2, Tetracycline, Adsorption, Kinetics, Isotherm.
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  • Aharoni, C., Sparks, D.L. and Levinson, S. 1991. Kinetics of soil chemical reactions: Relationships between empirical equations and diffusion models. Soil. Sci. Soc. Am. J., 55: 1307-1312.

  • Andreozzi, R., Caprio, V., Nsola, A. I. and Marotta R. 1999. Advanced oxidation processes (AOP) for water purification and recovery. Catal. Today, 53(1): 51-59.

  • Figueroa, R.A., Leonard, A. and MacKay, A. A. 2004. Modeling tetracycline antibiotic sorption to clays. Environ. Sci. Technol., 38(2): 476.

  • Freundlich, H.M.F. 1906. Uber die adsorption in lasungen. J. Phys. Chem., 57: 385-470.

  • Ho, Y.S. and McKay, G. 1999. Pseudo-second-order model for sorption process. Process Biochem., 34(5): 451-65.

  • Hu, C., Tang, Y.C., Yu, J.C. and Wong, P.K. 2003. Photocatalytic degradation of cationic blue X-GRL adsorbed on TiO2/SiO2 photocatalyst. Appl. Catal. B-Environ., 40(2): 131-140.

  • Ishibashi, K., Fujishima, A., Watanabe, T. and Hashimoto, K. 2000. Quantum yields of active oxidative species formed on TiO2 photocatalyst. J. Photochem. Photobiol. A: Chemistry. 134(1-2): 139142.

  • Joseph, C.G., Puma, G.L., Bono, A. and Krishnaiah, D. 2009. Sonophotocatalysis in advanced oxidation process: A short review. Ultrasonics Sonochemistry, 16(5): 583-589.

  • Kithome, M., Paul, J.W., Lavkulich, L.M. and Bomke, A.A. 1988. Kinetics of ammonium adsorption and desorption by the natural zeolite clinoptilolite. Soil Sci. Soc. Am. J., 62: 622-629.

  • Konstantinou, I.K. and Albanis, T.A. 2004. TiO2-assisted photocatalytic degradation of azo dyes in aqueous solution: kinetic and mechanistic investigations: a review. Applied Catalysis B: Environmental., 49(1): 1-14.

  • Lagergren, S. 1898. Zur theorie der sogenannten adsorption gelöster stoffe. Kungliga Svenska Vetenskapsakademiens. Handlinga. 24(4): 1-39.

  • Li, G.T., Wong, K.H., Zhang, X.W., Hu, C., Yu, J.C., Chan, R.C.Y. and Wong, P.K. 2009. Degradation of Acid Orange 7 using magnetic AgBr under visible light: the roles of oxidizing species. Chemosphere, 76(9): 1185-1191.

  • Liu, H.J., Yang, Y., Kang, J., Fan, M.H. and Qu, J.H. 2012. Removal of tetracycline from water by Fe-Mn binary oxide. J. Environ. Sci. China, 24(2): 242.

  • Pavlatou, A. and Polyzopouls, N.A. 1988. The role of diffusion in the kinetics of phosphate desorption: the relevance of the Elovich equation. J. Soil. Sci., 39(3): 425-436.

  • Shao, L.N., Ren, Z.M., Zhang, G.S. and Chen, L.L. 2012. Facile synthesis, characterization of a MnFe2O4/activated carbon magnetic composite and its effectiveness in tetracycline removal. Mater. Chem. Phys., 135(1): 16.

  • Vadivelan, V. and Kumar, K.V. 2005. Equilibrium, kinetics, mechanism, and process design for the sorption of methylene blue onto rice husk. J. Colloid Interf. Sci., 286(1): 90-100.

  • Yang, X., Flowers, R.C., Weinberg, H.S. and Singer, P.C. 2011. Occurrence and removal of pharmaceuticals and personal care products (PPCPs) in an advanced wastewater reclamation plant. Water Res., 45(16): 5218.

  • Yeddou, N. and Bensmaili, A. 2005. Kinetic model for the sorption of dye from aqueous solution by clay-wood sawdust mixture. Desalination, 185(1-3): 499-508.


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  • Preparation of Adsorbent CeO2-TiO2 and Enhanced Adsorptive Removal of Tetracycline

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Authors

Lingfeng Zhu
Department of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
Yixue He
Department of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
Yujie Guo
Department of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
Xi Chen
Department of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
Guoting Li
Department of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China

Abstract


In order to enhance the adsorption performance of TiO2, CeO2 was tentatively introduced into the matrix of TiO2 by sol-gel method. The prepared adsorbent CeO2-TiO2 was used for the efficient adsorptive removal of antibiotics tetracycline (TC). It was observed that the introduction of CeO2 into TiO2 matrix has improved the removal efficiency of TC by 57.6% compared to pure TiO2. The uptake of TC was highly dependent on the solution pH conditions and the highest uptake of TC occurred under alkaline condition. Linear simulation method failed to discern which kinetic model was better to describe the kinetic data between pseudo-first-order and pseudo-second-order models. By nonlinear simulation, Elovich kinetic model was found to be the best model to describe the TC adsorption onto CeO2-TiO2, indicating that the pronounced diffusion-control process was the rate-determining step. The maximal adsorption capacity of the prepared sorbent was 59.3 mg/g using Langmuir isotherm model at 298 K. The uptake of TC increased with an increase in the reaction temperature, which demonstrates that the adsorption of TC was endothermic.

Keywords


CeO2-TiO2, Tetracycline, Adsorption, Kinetics, Isotherm.

References