Using of Isolated Hydroxyapatite from Sheep Bones to Remove Lead (II) from Aqueous Solution and Studying the Thermodynamics and Adsorption Isotherm


  • Zaki N. Kadhim Department of Chemistry College of Science University of Basrah Basrah, !raq


Hydroxyapatite, AdsorptionIsotherm, Lead (II), Thermodynamics


In this paper, Cleaned sheep's bone pieces were heated at 1100°C to isolate hydroxyapatite(HAP). FTIR spectrometry and the X-ray diffractiometry was confirmed the presence of HAP. Kinetic batch experiments were used to study the adsorption behavior of  Pb2+ in HAP. The isothermal models Langmuir, Freundlich, Temkin and Dubinin-Kaganer-Radushevich (DKR) were applied to describe the adsorption properties by investigation the contact time, lead concentration and temperature. The equilibrium uptake of lead ions by isolated hydroxyapatite was fitted with Langmuir isotherm model. Thermodynamic parameters free energy change (ΔGo), enthalpy change (ΔHo) and entropy change were also calculated for adsorption process of lead and the results indicated that the adsorption reaction were spontaneous(∆Go<0), endothermic (∆H o>0) and pseudo first and second order both fitted the adsorption process of lead ions on isolated hydroxyapatite.


Shalaby S.W., Salz U.,"Polymers for Dental and Orthopedics Applications" Ch.3, pp. 79-80, CRC press ,Boca Raton.2007.

Chakraborty S., Bag S., Pal S., Mukherjee A.K.,structural and microstructural characterization of bioapatite using X-ray powder diffraction and Fourier transform infrared technique J. Appl. Cryst.,vol. 39, pp.385-390, 2006.

Markovie M., Fowler B.O., Tung M.S., Preparation and Comprehensive Characterization of a Calcium Hydroxyapatite Reference Material, J. Res. Natl. Inst. Technol., vol.109, pp.553-568, 2004.

- Morales J.G., Burgues J.T., Fraile T.B., Clemente R.R., Precipitation of Stoichiometric Hydroxyapatite by a Continuous Method Cryst. Res. Technol., vol.36, pp.15-26, 2001.

Mucalo M.R., Foster D.L., Wielage B., Steinhaeuser S., Mucha H., Knichton D., Kirby J., J . Appl. Biomat. Biomech , vol.2, pp.96-104,2004.

Mucalo M.R., Foster D.L., A method for Avoiding the Xanthoproteic-associated Discolouration in Reprecipitated (Nitric-acid-digested) Hydroxyapatite Prepared from Mammalian Bone Tissue, Croat. Chem. Acta., vol.77, pp.509-517, 2004.

Danilchenko S.N., Koropov A.V., Protsenko I.Y., Cleff B.S., Sukhadob L.F., Thermal behavior of biogenic apatite crystals in bone: An X-ray diffraction study. Cryst. Res. Technol., vol.41, pp.268-275, 2006.

Needleman H.L., Bone lead levels in adjudicated delinquents: A case control study. Neurotox. Teratol., vol.24,pp.711-717, 2002.

Patrick L., Lead Toxicity, A Review of the Literature. Part I: Exposure, Evaluation, and Treatment, Altern. Med. Review, vol.1, no.1, pp.1-22, 2006.

Ooi C.Y, Hamdi M.,Ramesh S., Properties of hydroxyapatite produced by annealing of bovine bone. Ceram. Inter., vol.33, 1171-1177, 2007.

Featherstone J.D., Pearson S., Geros R.Z., An infrared method for quantification of carbonate in carbonated apatites, Caries Res., vol.18, pp.63-66, 1984.

Rogers K.D., Daniels P., An X-ray diffraction study of the effects of heat treatment on bone mineral microstructure, Biomaterials, vol.23, pp. 2577-2585,2003.

Wien T., "Measurement and Acquisition of X-Ray Diffractometry Spectra", Ch. 9, pp. 748-752, Warsaw, 1995.

Pardo B. , Megademini T., André J.M., X-UV Synthetic Interference Mirrors : Theoretical Approach ,Revue. Phys. Appl. vol.23, pp. 1579-1597, 1988.

.Zamani Z., Salahi E., Mobaserpour I., Removal of Nickel from Aqueous Solution by Nano- Hydroxyapatite Originated from Persian Gulf Corals. Canadian Chemical Transactions, Vol.1, no.3,pp.173-190,2013.

Shukla S.S., Yu, L.J. Dorris, K.L. Shukla A., Removal of Nickel from Aqueous Solution by sawdust, J.Hazard. Mater,. Vol.121, pp.243-246,2005.

Doan, H.D. Wu, J. Mitzakov R., Combined electrochemical and biological treatment of industrial wastewater using porous electrodes, J. Chem. Technol. Biotechnol., vol.81,pp. 1398-1408, 2006.

Layla B A., Al-Najar A.A., Kadhim Z. N., Adsorption and Desorption Characteristics of Bispyribac-Sodium Pesticide in Eight Soil south of Iraq,Inter, J. Sci. Eng. Rese.vol.6, no7,pp. 1689-1700, 2015.

Langmuir I., The adsorption of gases on plane surface of glass, mica and platinum, J. Am.Chem.Soc.,vol.40, no.9,pp.1361-1403, 1918.

Freundlich H.M.F.,Uber die adsorption in losungen, (Over the adsorption in solution) Z.Phys.Chem., vol.57, pp.385-470, 1906.

Temkin M.I., Pyzhev V., Kinetics of ammonia synthesis on promoted iron catlyst, Acta Phys. Chim., USSR vo.12,pp.327-356, 1940.

Dubinin M.M., Zaverina E.D., Radushkevich L.V., Sorption and structure of active carbons, J. Phy. Chem., vol.21, pp. 1351-1362, 1947.

Lagergren S., Zur theorie der sogenannten adsorption geloster stoffe, Kunglia Svenska Vetenskapsakad,Handl,vol.24, pp.1-39,1898.

Ho. Y.S., McKay G., pesudo-second order model for sorption processes, Biochem. vol.34, pp.451-465, 1999.

Meski S., Ziani S., KhireddineH., Boudboub S. Zaidi S., Fatrorial design analysis for sorption of zinc on hydroxyapatite, J. Hazard. Mater. vol. 186, 1007-1017,2011.

Valsami-Jones E., Rangarsdottir K.V., Putnis A., Basbachb D., Kemp A.J., Cressey G., The dissolution of apatite in the presence of aqueous metal cations at pH 2-7, Chem. Geol. vol 151, pp. 215- 233, 1998.




How to Cite

Kadhim, Z. N. (2016). Using of Isolated Hydroxyapatite from Sheep Bones to Remove Lead (II) from Aqueous Solution and Studying the Thermodynamics and Adsorption Isotherm. Asian Journal of Applied Sciences, 4(1). Retrieved from