Adsorption of Lead on the LDO Based on Reconstruction of LDH

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The Mg-Al layered double hydroxide (LDH) with carbonate interaction was synthesized by the urea method under hydrothermal conditions and layered double oxide (LDO) was prepared by calcination of LDH. The LDO was used as adsorbents for the removal of lead from aqueous solutions. The X-ray diffraction patterns of the LDO demonstrate that the adsorption is significantly enhanced by reconstruction of its original layered structure in the presence of lead with the memory effect. The process involved a fast adsorption within three hours, followed by slower, more gradual and stable adsorption. The adsorption capability for lead is 6.26 mg/g. The results indicate that the calcined Mg-Al layered double hydroxide is an efficient adsorbent for the treatment of waste water with heavy metal ions.

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7-11

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October 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] L.C. Hsu, S.L. Wang, Y.M. Tzou, C.F. Lin, J.H. Chen, The removal and recovery of Cr(VI) by Li/Al layered double hydroxide (LDH), J. Hazard. Mater. 142(2007)242–249.

DOI: 10.1016/j.jhazmat.2006.08.024

Google Scholar

[2] X.F. Liang, W.G. Hou, Y.M. Xu, G.H. Sun, L. Wang, Y. Sun, X. Qin, Sorption of lead ion by layered double hydroxide intercalated with diethylenetriaminepentaacetic acid, Colloid. Surf. A, 366(2010)50–57.

DOI: 10.1016/j.colsurfa.2010.05.012

Google Scholar

[3] J.P. Chen, S. Wu, Acid/base-treated activated carbons: characterization of functional groups and metal adsorptive properties, Langmuir, 20(2004) 2233–2242.

DOI: 10.1021/la0348463

Google Scholar

[4] V.K. Gupta, A. Rastogi, V. K. Saini, N. Jain, Biosorption of copper (II) from aqueous solutions by spirogyra species, J. Colloid Interface Sci. 296(2006) 59–63.

DOI: 10.1016/j.jcis.2005.08.033

Google Scholar

[5] L.J. Wang, X.L. Xie, S.P. Su, J.X. Feng, C. A. Wilkie, A comparison of the fire retardancy of poly(methyl methacrylate) using montmorillonite, layered double hydroxide and kaolinite, Polym. Degrad. Stab. 95 (2010)572-578.

DOI: 10.1016/j.polymdegradstab.2009.12.012

Google Scholar

[6] L.J. Wang, X. J He and C. A. Wilkie, The Utility of Nanocomposites in Fire Retardancy, Materials, 3(2010)4580-4606.

DOI: 10.3390/ma3094580

Google Scholar

[7] Z. An, J. He, X. Duan, Layered materials and catalysis, Sci. China Chem. 42(2012)390-405.

Google Scholar

[8] X.L. Xie, X. Zhou, W.C. Cao, M.L. Zang, L.X. Shi, L.J. Wang, Preparation and Structure Characteristics of IBU-LDH and TAU-LDH Drug Release Materials, Acta Miner. Sinica, 32(2012)481-485.

Google Scholar

[9] M. Mokhtara, A. Inayat, J. Ofili, W. Schwieger, Thermal decomposition, gas phase hydration and liquid phase reconstruction in thesystem Mg/Al hydrotalcite/mixed oxide: A comparative study, Appl. Clay Sci., 50(2010)176–181.

DOI: 10.1016/j.clay.2010.07.019

Google Scholar