Separation Studies of PdII from Acidic Chloride Solutions of PtIV, NiII and RhIII by Using 4-Aroyl-3-Phenyl-5-IsoxazolonesReportar como inadecuado

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E-Journal of Chemistry - Volume 9 2012, Issue 2, Pages 756-765

Department of Nanomaterial Chemistry College of Science and Technology, Dongguk University 707 Seokjang-Dong, Gyeongju, Gyeongbuk -780 714, Republic of Korea

Department of Chemistry GEBH Sreevidyanikethan Engineering College Atonomous, Sri Sainath Nagar-517 501 A.Rangampet, Tirupathi, Andhrapradesh, India

Received 25 October 2011; Accepted 30 December 2011

Copyright © 2012 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study examined the effect influence of various factors on the extraction of PdII to develop a new liquid-liquid extraction mechanism for the selective separation of palladiumII from its acidic chloride solutions using 4-aroyl-3-phenyl-5-isoxazolones HA, such as 3-phenyl-4-4-fluorobenzoyl-5- isoxazolone HFBPI, 3-phenyl-4-benzoyl-5-isoxazolone HPBI and 3-phenyl-4- 4-toluoyl-5-isoxazolone HTPI. The extraction strength of PdII with HA were in the following order: HFBPI > HPBI > HTPI, which is opposite to that observed with their pKa values. HPBI was used to separate PdII from PtIV, NiII and RhIII metal ions and calculated their separation factors S.F. were followed in the order: Pd-Ni 40±0.4 > Pd-Pt 25±0.2 > Pd-Rh 15±0.3 > Rh-Ni 2.7±0.3 > Pt-Ni ≈ Rh-Pt 1.7±0.2. The loading and striping of PdII 1.12×10

mol L

were also examined using 1.0×10

mol L

HPBI in CHCl3 and 1.0 mol L

HCl, respectively. The results demonstrated that the maximum 97.5% extraction and desorption 89% of metal required at least 3.0 cycles. The developed method was applied successfully to the separation of palladium from synthetic water samples.

Autor: Koduru Janardhan Reddy and Kap Duk Lee



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