Study of Equilibrium and Mass Transfer of Co- Extraction of Different Mineral Acids with Iron(III) from Aqueous Solution by Tri-n-Butyl Phosphate Using Liquid Membrane
Extraction of Fe(III) from aqueous solution using Trin-
butyl Phosphate (TBP) as carrier needs a highly acidic medium
(>6N) as it favours formation of chelating complex FeCl3.TBP.
Similarly, stripping of Iron(III) from loaded organic solvents requires
neutral pH or alkaline medium to dissociate the same complex. It is
observed that TBP co-extracts acids along with metal, which causes
reversal of driving force of extraction and iron(III) is re-extracted
back from the strip phase into the feed phase during Liquid Emulsion
Membrane (LEM) pertraction. Therefore, rate of extraction of
different mineral acids (HCl, HNO3, H2SO4) using TBP with and
without presence of metal Fe(III) was examined. It is revealed that in
presence of metal acid extraction is enhanced. Determination of mass
transfer coefficient of both acid and metal extraction was performed
by using Bulk Liquid Membrane (BLM). The average mass transfer
coefficient was obtained by fitting the derived model equation with
experimentally obtained data. The mass transfer coefficient of the
mineral acid extraction is in the order of kHNO3 = 3.3x10-6m/s > kHCl =
6.05x10-7m/s > kH2SO4 = 1.85x10-7m/s. The distribution equilibria of
the above mentioned acids between aqueous feed solution and a
solution of tri-n-butyl-phosphate (TBP) in organic solvents have been
investigated. The stoichiometry of acid extraction reveals the
formation of TBP.2HCl, HNO3.2TBP, and TBP.H2SO4 complexes.
Moreover, extraction of Iron(III) by TBP in HCl aqueous solution
forms complex FeCl3.TBP.2HCl while in HNO3 medium forms
complex 3FeCl3.TBP.2HNO3
[1] J. Saji, M.L.P. Reddy, Liquid-liquid extraction separation of
iron(III)/from titania wastes using TBP-MIBK mixed solvent system,
Hydrometallurgy 61:81-87(2001).
[2] J. Saji, M.L.P. Reddy, Liquid-liquid extraction separation of
iron(III)/from titania wastes using TBP-MIBK mixed solvent system,
Hydrometallurgy 61:81-87(2001).
[3] K.K. Sahu And R.P. Das, Synergistic Extraction of Iron(III) at Higher
Concentrations in D2EHPA-TBP Mixed Solvent Systems, Metallurgical
and Materials Transactions B , Vol 28B , 181-189 (1997).
[4] Santosh K. Majumdar, and Anl K. De, Liquid-Liquid Extraction of
Iron(III) with Tributylphosphate, Pergamon Press Ltd Vol. 7, 1 -
6(1960).
[5] S.I. El Dessouky a, Y.A. El-Nadi a, I.M. Ahmeda, E.A. Saad b, J.A.
Daouda, Solvent extraction separation of Zn(II), Fe(II), Fe(III) and
Cd(II) using tributylphosphate and CYANEX 921 in kerosene from
chloride medium , Chemical Engineering and Processing 47 177-
183(2008).
[6] Tetsuji Hirato, Zhi-Chun Wu, Yoshiyasu Yamada and Hiroshi Majima,
Improvement of the stripping characteristics of Fe (III) utilizing a
mixture of di (2-ethylhexylphosphoric acid and tri-n-butyl phosphate,
Hydrometalhtrgy, 28: 81-93( 1992 ).
[7] Taichi Sato , Takato Nakamura And Masayoshi Ikeno, The Extraction
Of Iron(III) From Aqueous Acid Solutions by Di(2-
Ethylhexyl)Phosphoric Acid, Hydrometallurgy, 15 209--217(1985).
[8] Archana Agrawal, S. Kumari, and K. K. Sahu, Iron and Copper
Recovery/Removal from Industrial Wastes: A Review Ind. Eng. Chem.
Res., 48, 6145-6161(2009).
[9] B.R. Reddy, P.V.R. Bhaskara Sarma, Extraction of iron(III) at macrolevel
concentrations using TBP, MIBK and their mixtures,
Hydrometallurgy 43 299-306(1996).
[10] R.K. Mishra, P.C.Rout, K Sarangi, K.C. Nathsarma, Comparative study
on extraction of Fe(III) from chloride leach liquor using TBP , Cyanex
921and Cyanex 923, Hydrometallurgy , 104:298-303(2010).
[11] C. Lupi , D. Pilone , Reductive stripping in vacuum of Fe(III) from
D2EHPA, Hydrometallurgy 57 201-207 (2000).
[12] B.R. Reddy, P.V.R. Bhaskara Sarma, Extraction of iron(III) at macrolevel
concentrations using TBP, MIBK and their mixtures,
Hydrometallurgy 43 (1996) 299-306.
[13] Vogel's Quantitative Chemical Analysis (5th Edition),1989.
[14] Man-Seung Lee, Gwang-Seop Lee and Keun Yong Sohn, Solvent
Extraction Equilibria of FeCl3 with TBP, Materials Transactions 45, 6
(2004) 1859 -1863
[15] D.K. Singh, S.L. Mishra, H. Singh, Stripping of iron(III) from the
D2EHPA + TBP extract produced during uranium recovery from
phosphoric acid by oxalic acid, Hydrometallurgy 81 (2006) 214-218.
[1] J. Saji, M.L.P. Reddy, Liquid-liquid extraction separation of
iron(III)/from titania wastes using TBP-MIBK mixed solvent system,
Hydrometallurgy 61:81-87(2001).
[2] J. Saji, M.L.P. Reddy, Liquid-liquid extraction separation of
iron(III)/from titania wastes using TBP-MIBK mixed solvent system,
Hydrometallurgy 61:81-87(2001).
[3] K.K. Sahu And R.P. Das, Synergistic Extraction of Iron(III) at Higher
Concentrations in D2EHPA-TBP Mixed Solvent Systems, Metallurgical
and Materials Transactions B , Vol 28B , 181-189 (1997).
[4] Santosh K. Majumdar, and Anl K. De, Liquid-Liquid Extraction of
Iron(III) with Tributylphosphate, Pergamon Press Ltd Vol. 7, 1 -
6(1960).
[5] S.I. El Dessouky a, Y.A. El-Nadi a, I.M. Ahmeda, E.A. Saad b, J.A.
Daouda, Solvent extraction separation of Zn(II), Fe(II), Fe(III) and
Cd(II) using tributylphosphate and CYANEX 921 in kerosene from
chloride medium , Chemical Engineering and Processing 47 177-
183(2008).
[6] Tetsuji Hirato, Zhi-Chun Wu, Yoshiyasu Yamada and Hiroshi Majima,
Improvement of the stripping characteristics of Fe (III) utilizing a
mixture of di (2-ethylhexylphosphoric acid and tri-n-butyl phosphate,
Hydrometalhtrgy, 28: 81-93( 1992 ).
[7] Taichi Sato , Takato Nakamura And Masayoshi Ikeno, The Extraction
Of Iron(III) From Aqueous Acid Solutions by Di(2-
Ethylhexyl)Phosphoric Acid, Hydrometallurgy, 15 209--217(1985).
[8] Archana Agrawal, S. Kumari, and K. K. Sahu, Iron and Copper
Recovery/Removal from Industrial Wastes: A Review Ind. Eng. Chem.
Res., 48, 6145-6161(2009).
[9] B.R. Reddy, P.V.R. Bhaskara Sarma, Extraction of iron(III) at macrolevel
concentrations using TBP, MIBK and their mixtures,
Hydrometallurgy 43 299-306(1996).
[10] R.K. Mishra, P.C.Rout, K Sarangi, K.C. Nathsarma, Comparative study
on extraction of Fe(III) from chloride leach liquor using TBP , Cyanex
921and Cyanex 923, Hydrometallurgy , 104:298-303(2010).
[11] C. Lupi , D. Pilone , Reductive stripping in vacuum of Fe(III) from
D2EHPA, Hydrometallurgy 57 201-207 (2000).
[12] B.R. Reddy, P.V.R. Bhaskara Sarma, Extraction of iron(III) at macrolevel
concentrations using TBP, MIBK and their mixtures,
Hydrometallurgy 43 (1996) 299-306.
[13] Vogel's Quantitative Chemical Analysis (5th Edition),1989.
[14] Man-Seung Lee, Gwang-Seop Lee and Keun Yong Sohn, Solvent
Extraction Equilibria of FeCl3 with TBP, Materials Transactions 45, 6
(2004) 1859 -1863
[15] D.K. Singh, S.L. Mishra, H. Singh, Stripping of iron(III) from the
D2EHPA + TBP extract produced during uranium recovery from
phosphoric acid by oxalic acid, Hydrometallurgy 81 (2006) 214-218.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:62901", author = "Diptendu Das and Vikas Kumar Rahi and V. A. Juvekar and R. Bhattacharya", title = "Study of Equilibrium and Mass Transfer of Co- Extraction of Different Mineral Acids with Iron(III) from Aqueous Solution by Tri-n-Butyl Phosphate Using Liquid Membrane", abstract = "Extraction of Fe(III) from aqueous solution using Trin-
butyl Phosphate (TBP) as carrier needs a highly acidic medium
(>6N) as it favours formation of chelating complex FeCl3.TBP.
Similarly, stripping of Iron(III) from loaded organic solvents requires
neutral pH or alkaline medium to dissociate the same complex. It is
observed that TBP co-extracts acids along with metal, which causes
reversal of driving force of extraction and iron(III) is re-extracted
back from the strip phase into the feed phase during Liquid Emulsion
Membrane (LEM) pertraction. Therefore, rate of extraction of
different mineral acids (HCl, HNO3, H2SO4) using TBP with and
without presence of metal Fe(III) was examined. It is revealed that in
presence of metal acid extraction is enhanced. Determination of mass
transfer coefficient of both acid and metal extraction was performed
by using Bulk Liquid Membrane (BLM). The average mass transfer
coefficient was obtained by fitting the derived model equation with
experimentally obtained data. The mass transfer coefficient of the
mineral acid extraction is in the order of kHNO3 = 3.3x10-6m/s > kHCl =
6.05x10-7m/s > kH2SO4 = 1.85x10-7m/s. The distribution equilibria of
the above mentioned acids between aqueous feed solution and a
solution of tri-n-butyl-phosphate (TBP) in organic solvents have been
investigated. The stoichiometry of acid extraction reveals the
formation of TBP.2HCl, HNO3.2TBP, and TBP.H2SO4 complexes.
Moreover, extraction of Iron(III) by TBP in HCl aqueous solution
forms complex FeCl3.TBP.2HCl while in HNO3 medium forms
complex 3FeCl3.TBP.2HNO3", keywords = "Bulk Liquid Membrane (BLM) Transport, Iron(III) extraction, Tri-n-butyl Phosphate, Mass Transfer coefficient.", volume = "7", number = "6", pages = "456-8", }