Chapter 2 Integrated separation systems

Muraviev, Dmitri

doi:10.1016/s0166-526x(03)80107-1

Cited by 3 publications

(1 citation statement)

References 63 publications

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“…Under certain conditions, the ion-exchange purification process is accompanied by the concentration of one of the components of the mixture under separation. For example, this effect is observed when using the frontal − and the reverse frontal ,,, separation techniques.…”

Section: Introductionmentioning

confidence: 96%

Peculiarities of the Dynamics of Ion Exchange in Supersaturated Solutions and Colloid Systems

2003

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This paper reports the results obtained by experimental and theoretical study of the dynamics of ion exchange accompanied by the ion-exchange isothermal supersaturation (IXISS) effect. This effect is observed for a number of ion-exchange systems where the frontal or the reverse frontal separation is accompanied by the formation of extremely stable supersaturated solutions of low solubility substances in the interstitial space of ion-exchange columns. After leaving the column, a supersaturated solution crystallizes spontaneously, which allows for designing a practically ideal ion-exchange process where a crystalline product is obtained directly after the ion-exchange treatment cycle. The paper comprises results on the experimental investigation of IXISS of magnesium carbonate on carboxylic resins, which is observed in desorption of Mg 2+ from the resin in the Mg form with Na2CO3 solutions or with solutions of Na2CO3-NaHCO3 mixtures. The physical and mathematical models of the kinetics and the dynamics of the ionexchange processes proceeding in a colloid system comprising a supersaturated solution and an ion exchanger, which surface is partially blocked by adsorbed precrystalline aggregated (micelles), are proposed, and their validity is experimentally confirmed.

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Section: Introductionmentioning

confidence: 96%

Peculiarities of the Dynamics of Ion Exchange in Supersaturated Solutions and Colloid Systems

2003

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Preparation and characterization of polymer‐stabilized metal nanoparticles for sensor applications

Macanás

Farré

Muñoz

et al. 2006

Physica Status Solidi (a)

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Nanomaterial-based sensing devices attract great attention of scientist and technologists due to the special properties of nano-objects, such as for example, Metal Nanoclusters (MNC), which differ from those of the bulk materials. The further development of these devices requires novel approaches to stabilize MNC and therefore, to save their unique properties. The Solid-Phase-Incorporated-Reagents (SPHINER) technique was used for in situ synthesis of Polymer-Stabilized Metal Nanoclusters (PSMNC), which were used in the construction of new composite electrodes. The size of Pt-PSMNC synthesized in polyvinyl chloride (PVC) and polysulfone stabilizing matrices was determined by Transmission Electron Microscopy (TEM) technique and appeared to be in majority of cases of 6 -20 nm. The electrochemical characterization of PSMNC-based amperometric sensors has demonstrated that inclusion of Pt-MNC increases the electrical conductivity of the membrane and that the electrode performance strongly depends on both the type of polymeric matrix and the membrane preparation technique.

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Extractant Assisted Synthesis of Polymer Stabilized Platinum and Palladium Metal Nanoparticles for Sensor Applications

Muraviev

Pividory

Soto

et al. 2006

Solvent Extraction and Ion Exchange

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Chapter 2 Integrated separation systems

Cited by 3 publications

References 63 publications

Peculiarities of the Dynamics of Ion Exchange in Supersaturated Solutions and Colloid Systems

Peculiarities of the Dynamics of Ion Exchange in Supersaturated Solutions and Colloid Systems

Preparation and characterization of polymer‐stabilized metal nanoparticles for sensor applications

Extractant Assisted Synthesis of Polymer Stabilized Platinum and Palladium Metal Nanoparticles for Sensor Applications

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