Adsorption of Phosphate on Mg/Fe Layered Double Hydroxides with Different Anions Intercalation

Abstract:

Three kinds of Mg/Fe layered double hydroxides (LDHs) with different intercalation anions (NO₃^-, Cl^- and CO₃^2-) were synthesized and used as adsorbents for the removal of phosphate in aqueous solutions. Results showed that the phosphate removal decreased with the increase of solution pH from 3.0 to 11.0. The adsorption behavior of phosphate followed the Freundlich adsorption isotherm. LDHs-NO₃^- had the highest adsorption ability for phosphate, the followed order was LDHs-Cl^- and LDHs-CO₃^2-. The adsorption kinetics of phosphate onto the three kinds of LDHs fit the pseudo-second-order kinetic model.

• Periodical: Applied Mechanics and Materials (Volume 737)
• Pages: 524-527
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.737.524
• Online since: March 2015
• Authors: Yan Wei Guo, Hua Zhang, Zhi Liang Zhu*
• Keywords: Adsorption, Layered Double Hydroxides, Phosphate Removal

References

[1] E. Oguz: J. Colloid Interface Sci. Vol. 281 (2005), p.62.

[2] C. Namasivayam and D. Sangeetha: J. Colloid Interface Sci. Vol. 280 (2004), p.359.

[3] S. Miyata: Clays Clay Miner. Vol. 31 (1983), p.305.

[4] F. Cavani, F. Trifiro and A. Vaccari: Catal. Today. Vol. 11 (1991), p.173.

[5] L. Yang, M.D.Z. Shahrivari, M. Ostwal, P.K.T. Liu and M. Sahimi: Ind. Eng. Chem. Res. Vol. 45 (2006), p.4742.

[6] T. Türk, I. Alp and H. Deveci: J. Hazard. Mater. Vol. 171 (2009), p.665.

[7] R. Bîrjega, O.D. Pavel, G. Costentin, M. Che and E. Angelescu: Appl. Catal. A . Vol. 288 (2005), p.93.

[8] C. Busetto, G.P. Del, G. Mamara, F. Trifiro and A. Vaccari: J. Catal. Vol. 85 (1984), p.260.

[9] M.S. Onyango, Y. Kojima, O. Aoyi, E.C. Bernardo and H. Matsuda: J. Colloid Interface Sci. Vol. 279 (2004), p.341.

[10] E. Bulut, M. Ozacar and I.A. Sengil: J. Hazard. Mater. Vol. 154 (2008), p.613.