Kinetic Studies on the Recovery of Pb2+and UO22+ from Aqueous Solutions into Chloroform Solution of N,N’-Ethylenebis(4-Butanoyl-2,4-Dihydro-5-Methyl-2-Phenyl-3H-Pyrazol-3-Oneimine) Schiff Base
Science Journal of Analytical Chemistry
Volume 2, Issue 5, September 2014, Pages: 55-58
Received: Sep. 28, 2014;
Accepted: Oct. 13, 2014;
Published: Oct. 20, 2014
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Chukwu Uche John, Department of Pure and Industrial Chemistry, University of Port Harcourt, Choba, Port Harcourt, Rivers State, Nigeria
Godwin Jackson, Department of Chemical Sciences, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria
Onuigbo Somadina Benson, Department of Pure and Industrial Chemistry, University of Port Harcourt, Choba, Port Harcourt, Rivers State, Nigeria
The kinetic studies on the recovery of UO22+ and Pb2+ from aqueous solutions into chloroform solution of N,N’-ethylenebis(4-butanoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneimine) schiff base H2BuEtP has been investigated and the rate of reaction found to be first order with respect to both metal ions (UO22+ and Pb2+). The rate of extraction was equally dependent on the inverse of hydrogen ion concentration for both metal ions. The rate constant Kf was equally calculated from intercepts of plots to be 0.491min-1 for UO22+ and 0.411 min-1 Pb2+ metal ions. Optimum percentage extraction of 99.714% was observed for Pb2+ metal ion at 30mins equilibration time and 98.216% for UO22+ metal ion at 20mins equilibration time. The study on mechanism of extraction for the metal ions from the aqueous phase into the organic phase showed that the formation of the first chelate ring of mono-pyrazolonato metal complex is the rate determining step which involved a slow bond-weaking effect by the bidendate H2BuEtP on the water molecule.
Chukwu Uche John,
Onuigbo Somadina Benson,
Kinetic Studies on the Recovery of Pb2+and UO22+ from Aqueous Solutions into Chloroform Solution of N,N’-Ethylenebis(4-Butanoyl-2,4-Dihydro-5-Methyl-2-Phenyl-3H-Pyrazol-3-Oneimine) Schiff Base, Science Journal of Analytical Chemistry.
Vol. 2, No. 5,
2014, pp. 55-58.
Kalagbor, A. I., Uzoukwu, B. A., and Chukwu, U. J.; Extraction of Molybdenum (VI) with 4-Adipoyl and 4-Sebacoyl derivatives of bis(1-phenyl-3-methylpyrazolone-5) in acid media. Nature and Science, 2011; 9(3):37.
Uzoukwu, B. A, Gloe, K., Duddeck, H.; Extraction of Uranium(VI) and Vanadium(V) with 4-Adopoyl and 4-Sebacoyl derivatives of bis(1-phenyl-3-methyl-pyrazolone-5) and effect of decanol on the distribution behaviour of these metal ions. Solvent Extraction and Ion Exchange. 1998; 16(3), 751- 774.
Makrlik, E., and Vanura, P.; Solvent extraction of lead using a nitrobenzene solution of strontium dicarbollycobaltate in the presence of polyethylene glycol PEG 400; Journal of Radioanalytical and Nuclear Chemistry, 2006; 267 (1), 233 – 235.
Okafor, E. C., and Uzoukwu, B. A.; Extraction of Fe (III) and U (VI) with 1-phenyl-3-methyl-4-acylpyrazolones-5 from aqueous solutions of different acids and complexing agents. RadiochimicaActa, 1990; 51, 167.
Jin-xin, G., Si-xiu, S., Dong-li, D., Ming-xia, L.,Hua, P., and Zhao-li, M.,; Uranium(VI) extraction with benzyloctadecyldimethylammonium chloride (BODMAC) from chloride and sulfate solutions, Journal of Radioanalytical and Nuclear Chemistry, 2006; 3, 675-678.
Uzoukwu, B. A, Gloe, K. and Duddeck, H.; 4-Acylpyrazoloneimine schiff bases and their metal complexes: synthesis and spectroscopic studies. Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 1998; 28(5), 819-831.
Uzoukwu, B. A., Gloe, K., and Duddeck, H.; N,N‟-ethylenebis(1-phenyl-3-methyl-4-acylpyrazoloneimine) derivatives: synthesis and UV, IR, 1H and 13C NMR spectral studies‟, Indian Journal of Chemistry, 1998; 37B: pp. 1180 – 1183.
Chukwu U. J. and Uzoukwu B. A; Extraction of Cu2+ ions from aqueous solutions of bromide ions using 1-phenyl-3-methyl-4-trichloroacetylpyrazolone-5 and molecular modeling of the complex. Recent Patents on Materials Science, 2012; 5, 68-73.
Godwin, J., Nwadire, C. F., and Uzoukwu, B. A.; ‘Extraction of Ni(II) ions into chloroform solution of N,N‟-Ethylenebis(4-butanoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneimine) Schiff base’, Eur. Chem. Bull. 2012; 1(7): 269-273.
Chukwu, U. J. and Godwin, J.; Solvent extraction studies of Uranium (VI) from aqueous media into chloroform solution of N,N´-ethylenebis(4-propionyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneimine). American Chemical Science Journal 2013; 3(4): 479-488.
Godwin, J., and Uzoukwu, B. A.; Distribution of Pb (II) ions into chloroform solution of N,N‟-ethylenebis(4-butanoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneimine) as tris-complex species‟, Journal of Applied Chemistry (IOSRJAC) 2012; 1(3): pp 14-21.
Godwin, J., and Uzoukwu, B. A.; Distribution of U(VI) from aqueous solutions into chloroform solution of N,N‟-ethylenebis(4-butanoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneimine) Schiff Base‟, International Journal of Chemistry; 2012; 4 (4): pp 105 – 116.
Uzoukwu, B. A. and Godwin, J.; Separation of UO22+ from a mixture with Pb(II) in aqueous solutions using N,N’-ethylenebis(4-butanoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneimine) schiff base (‘Separation of 238U from 207Pb using EKEYEKWUTE-technique’). (2012) Patent; NG/P/2013/764.
Uzoukwu, B. A., and Adiukwu, P. U.: Kinetic studies on the recovery of Lead (II) and Lanthanum (III) from aqueous solution with xylene solutions of 1-phenyl-3-methyl-4-benzoylpyrazolone. Indian Journal of Chem., 1996; 35A, 230-232.
Uzoukwu, B. A, Gloe, K., Duddeck, H.; Kinetic studies of the solvent Extraction of UO2(II) and Hg(II) with 4-sebacoylbis(1-phenyl-3-methyl-pyrazolone-5) in chloroform. RadiochimActa. 1998; 83, 69-74.
Eigen M.; Pure applchem 1963; 6, 97.