Extraction mechanism of Gd3+ by BTMPPA
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2009
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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 |
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| language |
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Cyanex 272 Extraction mechanism Gadolinium Alloys Extraction behavior Materials engineering Solid phase extraction |
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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 |
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1643788616067973120 |