A Study on the Extraction of Cd(II), Co(II) and Ni(II) Ions by Bis(2-ethylhexyl)phosphoric Acid and 2-Thenoyltrifluoroacetone

Document Type : Research Article


1 Phase Equilibria Research Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, P.O. Box 45195-313 Zanjan, I.R. IRAN

2 Phase Equilibria Research Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan,P.O. Box 45195-313 Zanjan, I.R. IRAN


Keep in mind the importance of cadmium, cobalt and nickel ions as environmentally and economically strategic heavy metals, the application of two acidic extractants, named bis(2-diethylhexyl)phosphoric acid (DEHPA) and 2-thenoyltrifluoroacetone (HTTA), was assessed for the extraction-recovery of these ions from leached solution of spent rechargeable Ni-Cd batteries. The conditions for leaching of metal contents in solid materials of the batteries were optimized.The effect of parameters influencing the process for achieving to an efficient and selective extraction of Cd, Co and Ni ions from synthetic samples and leach liquor of spent Ni-Cd batteries was investigated.


Main Subjects

[1] Zand A., Abduli M.A., Current Situation of Used Household Batteries in Iran and Appropriate Management Policies, Waste Management, 28, p. 2085 (2008).
[2] Putois F., Market for Nickel-Cadmium Batteries, J. Power Sources, 57, p. 67 (1995).
[3] Shapek R.A., Local-Government Household Battery Collection Programs-Costs and Benefits, Res. Conserv. Rec., 15, p. 1 (1995).
[4] Rydh C.J., Karltröm M., Life Cycle Inventory of Recycling Portable Nickel-Cadmium Batteries, Res. Conserv. Rec., 34, p. 289 (2002).
[5] Xue Z., Hua Z., Yao N., Chen S., Separation and Recovery of Nickel and Cadmium from Spent Cd-Ni Storage Batteries and Their Process Wastes, Sep. Sci. Technol., 27, p. 213 (1992).
[7] Gupta B., Deep A., Malik P., Extraction and Recovery of Cadmium Using Cyanex 923, Hydrometallurgy, 61, p. 65 (2001).
[8] Reddy B.R., Priya D.N., Chloride Leaching and Solvent Extraction of Cadmium, Cobalt and Nickel from Spent Nickel-Cadmium, Batteries Using Cyanex 923 and 272, J. Power Sources, 161, p. 1428 (2006).
[9] Rudnik E., Nikiel M., Hydrometallurgical Recovery of Cadmium and Nickel from Spent Ni-Cd Batteries, Hydrometallurgy, 89, p. 61 (2007).
[10] Reddy B.R., Rao S.V., Priya D.N., Selective Separation and Recovery of Divalent Cd and Ni from Sulphate Solutions with Mixtures of TOPS 99 and Cyanex 471 X, Sep. Purif. Technol., 59, p. 214 (2008).
[11] Yaftian M.R., Zamani A.A., Parinejad M., Shams E., Ion-Pair Extraction of Cadmium Complex Anions from Hydrochloric Acid Media Using Oxonium Ion-Dicyclohexyl-18-Crown-6 Complex, Sep. Purif. Technol. 42, p. 175 (2005).
[12] Yaftian M.R., Zamani A.A., Parinejad M., Facilitated Transport of Cadmium Ions from Hydrochloric Acid Solutions Through a Liquid Membrane Containing Dicyclohexyl-18-Crown-6 as Extractant-Carrier, Sep. Sci. Technol., 40, p. 2709 (2005).
[13] Zamani A.A., Yaftian M.R., Dallali N., Improved Extraction-Separation of Lanthanum/Europium Ions by Bis(2-Ethylhexyl)Phosphoric Acid Using 12-Crown-4 as an Ion Selective Masking Agent, Iran. J. Chem. Chem. Eng. 25, p. 15 (2006).
[14] Yaftian M.R., Zamani A.A., Rostamnia S., Thorium (IV) Ion-Selective Transport Through a Bulk Liquid Membrane Containing 2-Thenoyltrifluoroacetone as Extractant-Carrier, Sep. Purif. Technol., 49, p. 71 (2006).
[15] Yaftian M.R., Razipour M.R., Matt D., Thorium(IV) and Europium(III) Ions Extraction by Phosphorylated Calix[4]arene in Dichloromethane, J. Radioanal. Nucl. Chem., 270, p. 357 (2006).
[16] Parinejad M., Yaftian M.R., A Study on the Removal of Chromium(VI) Oxanions from Acid Solutions by Using Oxonium Ion-Crown Ether Complexes as Mobile Carrier Agents, Iran. J. Chem. Chem. Eng., 26, p. 19 (2007).