A comparative study of Cu(П) and Pb(П) adsorption by Iranian bentonite (Birjand area) in aqueous solutions

Document Type : Research Paper


1 PhD candidate in department of Mining & Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran

2 B.A student in department of Mining & Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran

3 Assistance professor department of Mining & Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran. A_azadmehr@aut.ac.ir, address: Amirkabir University of Technology, 424 Hafez Avenue, Tehran, Iran


Heavy metals such as Cu(II) and Pb(II) are among the hazardous pollutants that lead to severe ecological problems and have a toxic effect on living organisms. The removal of Cu(II) and Pb(II) by Iranian bentonite experiment were conducted in single component and multi component systems. The bentonite from the Birjand area was characterized by X-ray diffraction pattern and FTIR spectroscopy. The effects of initial Cu(П) and Pb(П) concentration were investigated on the adsorption process. An equilibrium study was performed and followed by five different isotherm models which included two parameter (Langmuir, Frendlich, Temkin and D-R) and three parameter (Khan) models . From the Langmuir isotherm, the equilibrium adsorption capacity for Cu(П) is 21.10 to 22.17 mg/g in single component and multi component systems respectively, and for Pb(П) is 27.80 to 40.49 mg/g in single component and multi component systems respectively. Comparative adsorption of Cu(II) and Pb(II) onto bentonite showed that the affinity for Pb(II) to interact with bentonite is higher than Cu(II). Based on the free energy of adsorption value for Cu(П) and Pb(П), the interaction between these ions and Iranian bentonite is chemical adsorption, that is to say, ion exchange.


Main Subjects

[1] Demirbas, A. (2004). Adsorption of lead and cadmium ions in aqueous solutions onto modified lignin from alkali glycerol delignication. Journal of hazardous materials109(1), 221-226.
[2] Lin, S. H., Lai, S. L., Leu, H. G. (2000). Removal of heavy metals from aqueous solution by chelating resin in a multistage adsorption process. Journal of hazardous materials76(1), 139-153.
[3] Futalan, C. M., Kan, C. C., Dalida, M. L., Hsien, K. J., Pascua, C., Wan, M. W. (2011). Comparative and competitive adsorption of copper, lead, and nickel using chitosan immobilized on bentonite. Carbohydrate polymers,83(2), 528-536.
[4] Korkut, O., Sayan, E., Lacin, O., Bayrak, B. (2010). Investigation of adsorption and ultrasound assisted desorption of lead (II) and copper (II) on local bentonite: A modelling study. Desalination259(1), 243-248.
[5] Apak, R., Tütem, E., Hügül, M., Hizal, J. (1998). Heavy metal cation retention by unconventional sorbents (red muds and fly ashes). Water research32(2), 430-440.
[6] Rahman, M.A., S. Ahsan, S. Kaneco, H. Katsumata, T. Suzuki, and K. Ohta. (2005). Wastewater treatment with multilayer media of waste and natural indigenous materials. Journal of environmental management, 74, 107-110.
[7] Yavuz, O., Guzel, R., Aydin, F., Tegin, I., Ziyadanogullari, R. (2007). Removal of cadmium and lead from aqueous solution by calcite. Polish journal of environmental studies16(3), 467.
[8] Hanzlik, P., Jehlicka, J., Weishauptova, Z., Sebek, O. (2004). Adsorption of copper, cadmium and silver from aqueous solutions onto natural carbonaceous materials. Plant soil and environment., 50(6), 257-264.
[9] Bergaya, F., Lagaly, G. (2013). Handbook of clay science (Vol. 5). Newnes.
[10] Sadeghalvad, B., Karimi, H. S., Hosseinzadegan, H., Azadmehr, A. R. (2014). A comparative study on the removal of lead from industrial wastewater by adsorption onto raw and modified Iranian Bentonite (from Isfahan area). Desalination and water treatment, 52(34-36), 6440-6452.
[11] Sadeghalvad, B., Armaghan, M., Azadmehr, A. (2014). Using iranian bentonite (Birjand area) to remove cadmium from aqueous solutions. Mine water and the environment33(1), 79-88.
[12] Liu, Y., Shen, X., Xian, Q., Chen, H., Zou, H., Gao, S. (2006). Adsorption of copper and lead in aqueous solution onto bentonite modified by 4′-methylbenzo-15-crown-5. Journal of hazardous materials137(2), 1149-1155.
[13] Hu, Q. H., Qiao, S. Z., Haghseresht, F., Wilson, M. A., Lu, G. Q. (2006). Adsorption study for removal of basic red dye using bentonite. Industrial & engineering chemistry research45(2), 733-738.
[14] Caglar, B., Afsin, B., Tabak, A., Eren, E. (2009). Characterization of the cation-exchanged bentonites by XRPD, ATR, DTA/TG analyses and BET measurement. Chemical engineering journal, 149(1), 242-248.
[15] Wang, S., Dong, Y., He, M., Chen, L., Yu, X. (2009). Characterization of GMZ bentonite and its application in the adsorption of Pb (II) from aqueous solutions. Applied clay science, 43(2), 164-171.
[16] Wang, Q., X. Chang, D. Li, Z. Hu, R. Li, Q. He. (2011). Adsorption of chromium (III), mercury (II) and lead (II) ions onto 4-aminoantipyrine immobilized bentonite. Journal of hazardous materials, 186, 1076-1081.
[17] Klinkenberg, M., R. Dohrmann, S. Kaufhold, and H. Stanjek. (2006). A new method for identifying Wyoming bentonite by ATR-FTIR. Applied clay science, 33, 195-206.
[18] Yang, S., Zhao, D., Zhang, H., Lu, S., Chen, L., Yu, X. (2010). Impact of environmental conditions on the sorption behavior of Pb (II) in Na-bentonite suspensions. Journal of hazardous materials, 183(1), 632-640.
[19] Foo, K.Y., Hameed, B. H. (2010). Insights into the modeling of adsorption isotherm systems. Chemical engineering journal, 156(1), 2-10., 73(8), 2720-2727.
[20] Hobson, J. P. (1969). Physical adsorption isotherms extending from ultrahigh vacuum to vapor pressure. The Journal of physical chemistry, 73(8), 2720-2727.
[21] Khan, A. R., Ataullah, R., Al-Haddad, A. (1997). Adsorption studies of some aromatic pollutants from dilute aqueous solutions on activated carbon at different temperatures. Journal of colloid and interface science194(1), 154-165.
[22] Liu, Y., Liu, Y. J. (2008). Biosorption isotherms, kinetics and thermodynamics. Separation and purification technology, 61(3), 229-242