The effect of ionic strength on the extraction of Thorium(IV) from nitrate solution by didodecylphosphoric acid (HDDPA)

M. A. Bayyari; M. K. Nazal; F. A. Khalili

doi:10.1016/j.jscs.2010.04.007

The effect of ionic strength on the extraction of Thorium(IV) from nitrate solution by didodecylphosphoric acid (HDDPA)

M. A. Bayyari^*
, M. K. Nazal
, F. A. Khalili

^*Corresponding author for this work

Applied Research Center for Environment and Marine Studies

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Extraction of Th(IV) ion from nitrate media at high ionic strength (I=1.00, 3.00, 5.00 and 7.00M) using didodecylphosphoric acid was studied. The effect of HDDPA concentration, ionic strength, pcH and temperature on the extraction processes have been studied in nitrate media. From the equation of the extraction process, (K_ex) extraction constant can be calculated from the distribution ratio D_c values at different temperatures. Enthalpy, free energy and entropy changes were determined. The composition of the complex formed were established to correspond to [Th(X)₄(HR₂)_Y]_org, where X=NO3- and Y=1 or 2, HR₂=HDDPA molecule and R₂=deprotonated HDDPA molecule.

Original language	English
Pages (from-to)	311-315
Number of pages	5
Journal	Journal of Saudi Chemical Society
Volume	14
Issue number	3
DOIs	https://doi.org/10.1016/j.jscs.2010.04.007
State	Published - Jul 2010

Keywords

Deionized water
Extraction
Ionic strength
Metal chelate complexes
Spontaneous process
Synergistic effect

ASJC Scopus subject areas

General Chemistry

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10.1016/j.jscs.2010.04.007

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title = "The effect of ionic strength on the extraction of Thorium(IV) from nitrate solution by didodecylphosphoric acid (HDDPA)",

abstract = "Extraction of Th(IV) ion from nitrate media at high ionic strength (I=1.00, 3.00, 5.00 and 7.00M) using didodecylphosphoric acid was studied. The effect of HDDPA concentration, ionic strength, pcH and temperature on the extraction processes have been studied in nitrate media. From the equation of the extraction process, (Kex) extraction constant can be calculated from the distribution ratio Dc values at different temperatures. Enthalpy, free energy and entropy changes were determined. The composition of the complex formed were established to correspond to [Th(X)4(HR2)Y]org, where X=NO3- and Y=1 or 2, HR2=HDDPA molecule and R2=deprotonated HDDPA molecule.",

keywords = "Deionized water, Extraction, Ionic strength, Metal chelate complexes, Spontaneous process, Synergistic effect",

author = "Bayyari, \{M. A.\} and Nazal, \{M. K.\} and Khalili, \{F. A.\}",

year = "2010",

month = jul,

doi = "10.1016/j.jscs.2010.04.007",

language = "English",

volume = "14",

pages = "311--315",

journal = "Journal of Saudi Chemical Society",

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TY - JOUR

T1 - The effect of ionic strength on the extraction of Thorium(IV) from nitrate solution by didodecylphosphoric acid (HDDPA)

AU - Bayyari, M. A.

AU - Nazal, M. K.

AU - Khalili, F. A.

PY - 2010/7

Y1 - 2010/7

N2 - Extraction of Th(IV) ion from nitrate media at high ionic strength (I=1.00, 3.00, 5.00 and 7.00M) using didodecylphosphoric acid was studied. The effect of HDDPA concentration, ionic strength, pcH and temperature on the extraction processes have been studied in nitrate media. From the equation of the extraction process, (Kex) extraction constant can be calculated from the distribution ratio Dc values at different temperatures. Enthalpy, free energy and entropy changes were determined. The composition of the complex formed were established to correspond to [Th(X)4(HR2)Y]org, where X=NO3- and Y=1 or 2, HR2=HDDPA molecule and R2=deprotonated HDDPA molecule.

AB - Extraction of Th(IV) ion from nitrate media at high ionic strength (I=1.00, 3.00, 5.00 and 7.00M) using didodecylphosphoric acid was studied. The effect of HDDPA concentration, ionic strength, pcH and temperature on the extraction processes have been studied in nitrate media. From the equation of the extraction process, (Kex) extraction constant can be calculated from the distribution ratio Dc values at different temperatures. Enthalpy, free energy and entropy changes were determined. The composition of the complex formed were established to correspond to [Th(X)4(HR2)Y]org, where X=NO3- and Y=1 or 2, HR2=HDDPA molecule and R2=deprotonated HDDPA molecule.

KW - Deionized water

KW - Extraction

KW - Ionic strength

KW - Metal chelate complexes

KW - Spontaneous process

KW - Synergistic effect

UR - https://www.scopus.com/pages/publications/84864325206

U2 - 10.1016/j.jscs.2010.04.007

DO - 10.1016/j.jscs.2010.04.007

M3 - Article

AN - SCOPUS:84864325206

SN - 1319-6103

VL - 14

SP - 311

EP - 315

JO - Journal of Saudi Chemical Society

JF - Journal of Saudi Chemical Society

IS - 3

ER -

The effect of ionic strength on the extraction of Thorium(IV) from nitrate solution by didodecylphosphoric acid (HDDPA)

Abstract

Keywords

ASJC Scopus subject areas

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