Ion-Exchange Equilibria between Some Rare Earth Metal Ions and Hydrogen Ions in Iron(III) and Tin(IV) Antimonates as Cation Exchangers

El‐Shahat, M. F.; Saad, E. A.; Burham, N.; El-Naggar, I.M.

doi:10.1006/mchj.1998.1647

Cited by 3 publications

(5 citation statements)

References 8 publications

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“…The hydrated ionic radius of the three metals in this study decrease in the order Cr(III) > Pb(II) > Ni(II). , Chromium(III) has the largest hydrated ionic radius of any known heavy metal, and its exchange requires a favorable pore opening . It is possible that the total active centers of the exchanger are not available for this species, thus diminishing the useful resin capacity.…”

Section: Resultsmentioning

confidence: 79%

“…40,41 Chromium(III) has the largest hydrated ionic radius of any known heavy metal, and its exchange requires a favorable pore opening. 35 It is possible that the total active centers of the exchanger are not available for this species, thus diminishing the useful resin capacity. On the other hand, the result obtained by Demirbas et al 34 for Pb 2+ and Ni 2+ indicates that the pH has a strong influence on the removal of both ions since this resin exhibits different capacities for both ions at higher pH values.…”

Section: Resultsmentioning

confidence: 99%

“…The standard thermodynamic properties of each binary system were obtained using the following thermodynamic relationships ,– Δ G ° A B = − R T α β ln K A B Δ G ° A B = Δ H ° A B − T · Δ S ° A B where R is the ideal gas constant and Δ G °, Δ H °, and Δ S ° are changes in free energy, enthalpy, and entropy, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The standard thermodynamic properties of each binary system were obtained using the following thermodynamic relationships 21,[34][35][36] ∆G°A B ) -…”

Section: Model and Predictionmentioning

confidence: 99%

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Ion-Exchange Equilibria of Pb²⁺, Ni²⁺, and Cr³⁺ Ions for H⁺ on Amberlite IR-120 Resin

et al. 2008

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A study of the binary cation-exchange equilibria between H+-form Amberlite IR-120 resin and aqueous solutions of lead, nickel, and chromium nitrates at pH < 3 has been made. Experiments were carried out at (283, 303, and 323) K with solutions having total cation concentrations of 0.1 eq·L−1. The experimental equilibrium data have been satisfactorily correlated using the homogeneous mass action law model (LAM). This model assumes nonideal behavior for both the solution and the solid phase. Wilson and Pitzer equations have been used to calculate activity coefficients in the solid and liquid phases, respectively. The standard enthalpy ΔH°AB and the standard entropy ΔS°AB were determined. The values of both the thermodynamic constant and standard Gibbs free energy ΔG°AB demonstrate temperature dependence. The rise in temperature caused a slight increase in the value of the equilibrium constant (K AB) for the ion exchange of all heavy metal ions tested in this study. According to equilibrium constants obtained, the Amberlite IR-120 exhibits the following order of selectivity, Cr3+ > Pb2+ > Ni2+, in all the ranges of the temperatures studied in agreement with the rule of higher selectivity at higher counterion charge.

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Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The standard thermodynamic properties of each binary system were obtained using the following thermodynamic relationships 21,[34][35][36] ∆G°A B ) -…”

Section: Model and Predictionmentioning

confidence: 99%

See 2 more Smart Citations

Ion-Exchange Equilibria of Pb²⁺, Ni²⁺, and Cr³⁺ Ions for H⁺ on Amberlite IR-120 Resin

et al. 2008

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“…Many studies have been conducted over the years to recover lanthanides and actinides from dilute solution, e.g., adsorption, − ion exchange, , precipitation, , solvent extraction, − and membrane filtration . Among them, solvent extraction is the most mature technology for rare earth separation using saponified 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (P507) as extractants.…”

Section: Introductionmentioning

confidence: 99%

Functionalized Magnetic Silica Nanoparticles for Highly Efficient Adsorption of Sm³⁺ from a Dilute Aqueous Solution

Wang

Katepalli

et al. 2018

Langmuir

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Separation of Sm from a dilute solution via conventional solvent extraction is often plagued by emulsion and third phase formation. These problems can be overcome with functionalized magnetic nanoparticles that can capture the target species and be separated from the raffinae phase rapidly and efficiently on application of a magnetic field. Magentic silica nanoparticles (FeO/SiO) were synthesized by a modified Stöber method and functionalized with carboxylate (FeO/SiO/RCOONa) and phosphonate (FeO/SiO/RRPONa) groups to achieve high adsorption capacity and fast adsorption kinetics. The adsorbents were characterized by X-ray diffraction analysis, transmission electron microscopy, BET measurements, magnetization property evaluation, Fourier infrared spectroscopy, and thermogravimetric analysis. Equilibrium adsorption of Sm on FeO/SiO/RCOONa particles was attained within 10 min and within 20 min on FeO/SiO/RRPONa nanoparticles. The kinetic data were correlated well with a pseudo-second-order model. Adsorption capacities of FeO/SiO/RCOONa and FeO/SiO/RRPONa were 228 and 180 mg/g, respectively. The recovery of the adsorbed Sm using 2 mol/L HCl as desorption agent was evaluated. The adsorption mechanism is discussed based on FTIR analysis, carboxylate group/Sm molar ratio, phosphonate group/Sm molar ratio, and pH. The adsorbents show significant potential for Sm recovery in industrial applications.

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Preparation of hybrid ion exchanger based on acrylamide for sorption of some toxic metal ions from aqueous waste solutions

et al. 2016

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Ion-Exchange Equilibria between Some Rare Earth Metal Ions and Hydrogen Ions in Iron(III) and Tin(IV) Antimonates as Cation Exchangers

Cited by 3 publications

References 8 publications

Ion-Exchange Equilibria of Pb²⁺, Ni²⁺, and Cr³⁺ Ions for H⁺ on Amberlite IR-120 Resin

Ion-Exchange Equilibria of Pb²⁺, Ni²⁺, and Cr³⁺ Ions for H⁺ on Amberlite IR-120 Resin

Functionalized Magnetic Silica Nanoparticles for Highly Efficient Adsorption of Sm³⁺ from a Dilute Aqueous Solution

Preparation of hybrid ion exchanger based on acrylamide for sorption of some toxic metal ions from aqueous waste solutions

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Ion-Exchange Equilibria between Some Rare Earth Metal Ions and Hydrogen Ions in Iron(III) and Tin(IV) Antimonates as Cation Exchangers

Cited by 3 publications

References 8 publications

Ion-Exchange Equilibria of Pb2+, Ni2+, and Cr3+ Ions for H+ on Amberlite IR-120 Resin

Ion-Exchange Equilibria of Pb2+, Ni2+, and Cr3+ Ions for H+ on Amberlite IR-120 Resin

Functionalized Magnetic Silica Nanoparticles for Highly Efficient Adsorption of Sm3+ from a Dilute Aqueous Solution

Preparation of hybrid ion exchanger based on acrylamide for sorption of some toxic metal ions from aqueous waste solutions

Contact Info

Product

Resources

About

Ion-Exchange Equilibria of Pb²⁺, Ni²⁺, and Cr³⁺ Ions for H⁺ on Amberlite IR-120 Resin

Ion-Exchange Equilibria of Pb²⁺, Ni²⁺, and Cr³⁺ Ions for H⁺ on Amberlite IR-120 Resin

Functionalized Magnetic Silica Nanoparticles for Highly Efficient Adsorption of Sm³⁺ from a Dilute Aqueous Solution