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Adsorption Isotherm Performance of Zr-Mn Binary Oxide for Efficient Removal of Antibiotics Tetracycline
Zr-Mn binary oxide was prepared by a simple co-precipitation method, in which Mn(II) was tentatively used to prepare a precursor solution. Then the prepared Zr-Mn binary oxide was used for the adsorptive removal of tetracycline (TC). Effect of molar ratio of Zr/Mn, adsorbent dose and solution pH was investigated. The Zr-Mn binary oxide with a presumed molar ratio of Zr/Mn at 2:1 had a better adsorption performance. The removal efficiency of TC (15 mg/L) at a dose of 10 mg achieved as much as 97.4%, which demonstrated an excellent adsorption capability of Zr-Mn binary oxide. Acidic and near-neutral solution pH conditions were favourable for the uptake of TC. Freundlich model described the adsorption isotherm better than Langmuir model, indicating a heterogeneous surface of the prepared adsorbent. Using Langmuir model, the calculated maximal adsorption capacities for TC achieved 129.5 mg/g at 298 K. Thermodynamic analysis indicated that the changes of enthalpy and entropy of the adsorption processes were 206.32 KJ mol-1 and 752.0 J mol-1 k-1, respectively. The negative value of Gibbs free energy change and the positive value of enthalpy also indicated that the adsorption process is spontaneous and endothermic.
Keywords
Zr-Mn Binary Oxide, Tetracycline, Adsorption, Isotherm.
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- Dou, X.M., Mohan, D., Pittman Jr., C.U. and Yang S. 2012. Remediating fluoride from water using hydrous zirconium oxide. Chem. Eng. J., 198-199: 236-245.
- Figueroa, R.A., Leonard, A. and MacKay, A.A. 2004. Modeling tetracycline antibiotic sorption to clays. Environ. Sci. Technol., 38: 476-483.
- Freundlich, H.M.F. 1906. Uber die adsorption in lasungen. J. Phys. Chem., 57: 385-470.
- Kim, S., Eichhorn. P., Jensen, J.N., Weber, A.S. and Aga, D.S. 2005. Removal of antibiotics in wastewater: Effect of hydraulic and solid retention times on the fate of tetracycline in the activated sludge process. Environ. Sci. Technol., 39: 5816-5823.
- Langmuir, I. 1916. Kinetic model for the sorption of dye aqueous solution by clay-wood sawdust mixture. J. Am. Chem. Soc., 38: 2221-2295.
- Li, G.Y., Zhu, W.Y., Zhu, L.F. and Chai, X.Q. 2016. Effect of pyrolytic temperature on the adsorptive removal of p-benzoquinone, tetracycline, and polyvinyl alcohol by the biochars from sugarcane bagasse. Korean J. Chem. Eng., 33(7): 2215-2221.
- 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: 242-247.
- Martinez, J.L. 2009. Environmental pollution by antibiotics and by antibiotic resistance determinants. Environmen. Pollut., 157: 2893-2902.
- Qu, J.H. 2008. Research progress of novel adsorption processes in water purification. J. Environ. Sci., 20: 1-13.
- 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: 5218-5228.
- Yuan, X., Xing, W., Zhuo, S.P, Han, Z.H., Wang, G.Q., Gao, X.L. and Yan, Z.F. 2009. Preparation and application of mesoporous Fe/carbon composites as a drug carrier. Micropor. Mesopor. Mat., 117: 678-684.
- Zhang, G.S., Qu, J.H., Liu, H.J., Liu, R.P. and Li, G.T. 2007. Removal mechanism of As(III) by a novel Fe-Mn binary oxide adsorbent: Oxidation and sorption. Environ. Sci. Technol., 41: 4613-4619.
- Zhang, W., Fu, J., Zhang, G.S. and Zhang, X.W. 2014. Enhanced arsenate removal by novel Fe-La composite (hydr)oxides synthesized via coprecipitation. Chem. Eng. J., 251: 69-79.
- Zhu, L.F., He, Y.X., Guo, Y.J., Chen, X. and Li, G.T. 2016. Preparation of adsorbent CeO2-TiO2 and enhanced adsorptive removal of tetracycline. Nat. Env. & Poll. Tech., 15(4): 1267-1272.
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