Issue 41, 2008
From the journal:

Physical Chemistry Chemical Physics

A pH dependent transport and back transport of americium(iii) through the cellulose triacetate composite polymer membrane of cyanex-301 and TBP: role of H-bonding interactions

Arunasis Bhattacharyya,a   Prasanta Kumar Mohapatra,a   Tapan Kumar Ghantyb  and  Vijay Kumar Manchanda*a  

* Corresponding authors

a Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
E-mail: vkm@barc.gov.in
Fax: +91 (0)22 2550 5151
Tel: +91 (0)22 2559 3688

b Theoretical Chemistry Section, Bhabha Atomic Research Centre, Trombay, Mumbai, India

Abstract

Transport of Am(III) was studied through the composite polymer membrane of Cyanex-301 [bis(2,4,4-trimethylpentyl)dithiophosphinic acid] and tri-n-butylphosphate (TBP). Depending on the pH of the strip solution containing alpha-hydroxyisobutyric acid (AHIBA), the transport behaviour of Am(III) was changed significantly. After ∼70% of the Am(III) transported to the strip side, interestingly, back transport of Am(III) was observed at a pH of 3.5. The back transport phenomenon was not so significant at pH 1 and 5.7. The back transport of Am(III) was attributed to the transport of AHIBA from strip to the feed side due to its interaction with TBP in the membrane and the attainment of Donnan equilibrium because of the presence of Na+ in the feed as the driving ion. The experimental observations were rationalized using the hydrogen bonding interaction energies obtained through ab initio molecular orbital and DFT calculations.

Graphical abstract: A pH dependent transport and back transport of americium(iii) through the cellulose triacetate composite polymer membrane of cyanex-301 and TBP: role of H-bonding interactions

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Article information

DOI
https://doi.org/10.1039/B805294H
Article type
Paper
Submitted
28 Mar 2008
Accepted
15 Jul 2008
First published
11 Sep 2008

Phys. Chem. Chem. Phys., 2008,10, 6274-6280

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A pH dependent transport and back transport of americium(III) through the cellulose triacetate composite polymer membrane of cyanex-301 and TBP: role of H-bonding interactions

A. Bhattacharyya, P. K. Mohapatra, T. K. Ghanty and V. K. Manchanda, Phys. Chem. Chem. Phys., 2008, 10, 6274 DOI: 10.1039/B805294H

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