The Effect of Temperature on Ion Exchange Equilibria. II. The Ammonium-Hydrogen and Thallous-Hydrogen Exchanges

Bonner, O. D.; Pruett, Robert R.

doi:10.1021/j150579a019

Cited by 24 publications

(5 citation statements)

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“…Some elements, such as Ba, even exhibit a curved thermo‐dependence relationship 31 . The absence of a clear correlation between temperature and ion‐exchange equilibria on cationic resins using the pre‐loaded column technique is reinforced by results obtained using batch experiments 32–34 …”

Section: Discussionmentioning

confidence: 99%

Absence of temperature effect on elution profiles on anionic and cationic ion‐exchange resins from 4°C to 28°C

Lamboux

Hassler

Davechand

et al. 2020

Rapid Comm Mass Spectrometry

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Rationale:In labs devoted to the geochemistry of non-traditional isotopes, chemical elution is necessary to purify the element of interest. Elution is always performed in over-pressured and air-conditioned clean rooms. We took advantage of an airconditioning failure in our lab during summer 2018 to study the effect of temperature on the characteristics of the elution profiles of ion-exchange resins. Methods:We performed the ion-exchange separation of copper, iron and zinc on macroporous anionic AG MP-1 resin and that of calcium on cationic AG 50W-X12 resin, at 28 C, prior to the measurement of their isotopic ratios by mass spectrometry. We further performed these experiments in a clean hood in a cold room at 4 C. The elution curves were processed on biological standards, i.e. bovine liver (SRM-1577c), fetal bovine serum (FBS), bone meal (SRM-1486) and the seawater IAPSO standard. Results:The elution profiles of major elements for each matrix, and those of copper, iron, zinc and calcium, were compared with those classically achieved at 20 C in airconditioned conditions. The results show that the elution profiles preserve their characteristics whatever the temperature, suggesting that partitioning coefficients between resin and solution are thermo-independent in the range of temperature from 4 C to 28 C. Conclusions:If generalized to other matrices, notably inorganic, and to other elements, notably the extreme case of the separation of Rare Earth Elements, the present results suggest that clean labs may not have to be air-conditioned. This would reduce installation and operating costs and have a positive effect on the environment, paving the way for the development of a "green geochemistry".

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Section: Discussionmentioning

confidence: 99%

Absence of temperature effect on elution profiles on anionic and cationic ion‐exchange resins from 4°C to 28°C

Lamboux

Hassler

Davechand

et al. 2020

Rapid Comm Mass Spectrometry

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“…In assessing the relative contribution of these factors, the isoleucine exchange is taken as an example. The enthalpy of exchange of the ammonium ion (Bonner and Pruett, 1959) is taken as an approximation of the electrostatic interaction of the isoleucine amino group at an ion exchange site. If it is assumed that the ion exchanger is saturated with isoleucine molecules and that each isoleucine side chain pairs with one other, then this enthalpy (Franks, 1975) will contribute to the overall enthalpy.…”

Section: Analysis and Discussionmentioning

confidence: 99%

“…The differential free energy of ion exchange and adsorption is given by (Bonner and Pruett 1959) Considering the standard requirements mentioned above of the ion exchange process, the standard enthalpy of exchange is written:…”

Section: Thermodynamics Of Ion Exchange: Theorymentioning

confidence: 99%

“…Manipulation of Solution Conditions for Single Amino Acids. While some work has been carried out previously to assess the variation in the selectivity coefficient as a function of temperature (Bonner and Pruett, 1959;Kraus and Raridon, 1959), only the ion exchange of inorganic ions was considered. No published information is available describing the effects of various electrolyte conditions on ion exchange selectivity of organic molecules.…”

Section: Optimization Of Selectivity and Separationmentioning

confidence: 99%

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Separation of Amino Acids at a Synthetic Ion Exchange Resin: Thermodynamics and Energetics

and

Moran

1996

Ind. Eng. Chem. Res.

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The thermodynamics and energetics of the ion exchange of four amino acids at a synthetic ion exchange resin have been studied. Experimental work included determination of ion exchange isotherms and the use of high-sensitivity titration microcalorimetry. A rigorous thermodynamic analysis of the data is developed allowing calculation of the standard free energy, the standard enthalpy, and standard entropy of exchange, and also the differential free energy, incremental enthalpy, and incremental entropy of exchange. The results show that the relative contributions of the enthalpy and entropy to the overall free energy differ markedly for the chosen amino acids. From a knowledge of these fundamental thermodynamic properties, the solution conditions giving enhanced separation are predicted. These predictions are experimentally confirmed. The paper establishes experimental protocols and data analysis methods that allow progression from a single isotherm and a single set of calorimetric data to a selection of process conditions for enhanced selectivity. The experimental techniques and analysis procedures developed are generally applicable to ion exchange separations of biomolecules.

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“…Different compounds modeling AR and BR components have been used namely: low molecular weight electrolytes [11][12][13][14][15][16]; low molecular weight organic electrolytes(monomers) or their mixtures [17][18][19]; slightly cross linked organic polyelectrolytes of the chemical nature identical to that of ion exchange resin under study [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of interphase equilibrium in system ion exchanger-solution of low molecular weight electrolyte

Ferapontov

Горшков

Parbuzina

et al. 2006

Reactive and Functional Polymers

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The Effect of Temperature on Ion Exchange Equilibria. II. The Ammonium-Hydrogen and Thallous-Hydrogen Exchanges

Cited by 24 publications

References 0 publications

Absence of temperature effect on elution profiles on anionic and cationic ion‐exchange resins from 4°C to 28°C

Absence of temperature effect on elution profiles on anionic and cationic ion‐exchange resins from 4°C to 28°C

Separation of Amino Acids at a Synthetic Ion Exchange Resin: Thermodynamics and Energetics

Thermodynamics of interphase equilibrium in system ion exchanger-solution of low molecular weight electrolyte

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