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Extraction mechanism of Gd3+ by BTMPPA

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Main Authors: Md Fazlul, Bari, Bahruddin, Saad, Ismail, Abdur Rahman, Muhammad Idris, Salleh
Format: Article
Language:English
Published: Elsevier 2009
Subjects:
Cyanex 272
Extraction mechanism
Gadolinium
Alloys
Extraction behavior
Materials engineering
Solid phase extraction
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/6886
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spelling my.unimap-68862009-08-13T08:07:55Z Extraction mechanism of Gd3+ by BTMPPA Md Fazlul, Bari Bahruddin, Saad Ismail, Abdur Rahman Muhammad Idris, Salleh Cyanex 272 Extraction mechanism Gadolinium Alloys Extraction behavior Materials engineering Solid phase extraction Link to publisher's homepage at http://www.elsevier.com The extraction behavior of Gd(III) from acidic nitrate-acetato medium by bis(2,4,4-trimethylpentyl)phosphinic acid (BTMPPA, H2A2) in toluene either alone or in combination with trioctylphospine oxide (TOPO, B) has been investigated as a function of contact time, concentrations of Gd3+, H+, NO3- and Ac- (acetate) in the aqueous phase, the concentration of H2A2 and TOPO in the organic phase and temperature. Dependencies of H+, BTMPPA, TOPO and Ac- concentrations on extraction ratio suggest that the extracted species are [Gd(Ac)(HA2)2·H2A2] and [Gd(Ac)A2·HA·2B] for without and with TOPO, respectively at lower loading, while GdA3 is extracted at higher loading in both cases. The synergistic effect of TOPO is observed only at higher TOPO concentrations region. The equilibrium constants are evaluated to be 10-0.63 and 10-2.79 for the system without and with TOPO, respectively. The La(III)/Gd(III) separation factors are found to be 348 and 393 for the system without and with TOPO, respectively. The temperature dependence of the extraction data from acidic nitrate-acetato gives the enthalpy of extraction, 56 kJ/mol. The loading capacity for 100 g BTMPPA is found to be 17.89 g Gd(III). 2009-08-13T08:07:24Z 2009-08-13T08:07:24Z 2006 Article Journal of Alloys and Compounds, vol.436 (1-2), 2006, pages 187-194. 0925-8388 http://www.sciencedirect.com/science/journal/09258388 http://hdl.handle.net/123456789/6886 en Elsevier
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Cyanex 272
Extraction mechanism
Gadolinium
Alloys
Extraction behavior
Materials engineering
Solid phase extraction
spellingShingle Cyanex 272
Extraction mechanism
Gadolinium
Alloys
Extraction behavior
Materials engineering
Solid phase extraction
Md Fazlul, Bari
Bahruddin, Saad
Ismail, Abdur Rahman
Muhammad Idris, Salleh
Extraction mechanism of Gd3+ by BTMPPA
description Link to publisher's homepage at http://www.elsevier.com
format Article
author Md Fazlul, Bari
Bahruddin, Saad
Ismail, Abdur Rahman
Muhammad Idris, Salleh
author_facet Md Fazlul, Bari
Bahruddin, Saad
Ismail, Abdur Rahman
Muhammad Idris, Salleh
author_sort Md Fazlul, Bari
title Extraction mechanism of Gd3+ by BTMPPA
title_short Extraction mechanism of Gd3+ by BTMPPA
title_full Extraction mechanism of Gd3+ by BTMPPA
title_fullStr Extraction mechanism of Gd3+ by BTMPPA
title_full_unstemmed Extraction mechanism of Gd3+ by BTMPPA
title_sort extraction mechanism of gd3+ by btmppa
publisher Elsevier
publishDate 2009
url http://dspace.unimap.edu.my/xmlui/handle/123456789/6886
_version_ 1643788616067973120
score 13.222552

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