Thermodynamics of the extraction of scandium(III) by the liquid cation exchangers dinonylnaphthalenesulfonic acid and bis(2-ethylhexyl) phosphoric acid

M. Raieh; N. Zakareia; H. Aly

doi:10.1007/bf02521279

Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 52: Issue 2

Thermodynamics of the extraction of scandium(III) by the liquid cation exchangers dinonylnaphthalenesulfonic acid and bis(2-ethylhexyl) phosphoric acid

Authors:

M. Raieh

M. Raieh Atomic Energy Establishment Nuclear Chemistry Department Cairo (Egypt)

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N. Zakareia

N. Zakareia Atomic Energy Establishment Nuclear Chemistry Department Cairo (Egypt)

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H. Aly

H. Aly Atomic Energy Establishment Nuclear Chemistry Department Cairo (Egypt)

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Pages:: 285–293

Online Publication Date:: 09 Jan 2007

Publication Date:: 01 Sep 1979

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02521279

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Abstract

The thermodynamic functions for the extraction of Sc³⁺ by liquid cation exchangers HD and HDEHP are determined radiometrically by the temperature coefficient method. The role of diluent dielectric constant on the extraction of Sc³⁺ by HD is also studied. The thermodynamic parameters determined indicated that the free energy variation for the extraction of Sc³⁺ by HD is mainly determined by the entropic terms arising from the hydration—dehydration process of the exchanged ions. In the case of HDEHP as extractant, the free energy variations are determined mainly by the entalpic terms of the system.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)