Bibliografie tematiche / Ion exchange resins

Letteratura scientifica selezionata sul tema "Ion exchange resins"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 25 luglio 2024

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Articoli di riviste sul tema "Ion exchange resins"

1

Singare, P. U. "Non Destructive Application of Radioactive Tracer Isotopes for Performance Evaluation of Industrial Grade Anion Exchange Resins Tulsion A-33 and Indion NSSR". International Letters of Chemistry, Physics and Astronomy 18 (settembre 2013): 50–62. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.18.50.

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Abstract (sommario):
The present study deals with non-destructive application of radioactive tracer isotopes to evaluate the performance of Tulsion A-33 (nuclear grade) and Indion NSSR (non-nuclear grade) anion exchange resins. The performance evaluation was done by carrying out the iodide and bromide ion-isotopic exchange reactions using the above resins. It was observed that at a constant temperature of 40.0 °C, as the concentration of labeled iodide ion solution increases 0.001 M to 0.004 M, the percentage of iodide ions exchanged increases from 58.0% to 64.0% for Tulsion A-33 resins; and from 48.4% to 50.8% for Indion NSSR resins. Similarly in case of bromide ion-isotopic exchange reaction under identical experimental conditions, the percentage of bromide ions exchanged increases from 45.6% to 50.4% for Tulsion A-33 resin; and from 39.8% to 44.6% for Indion NSSR resin. It was also observed that during iodide ion-isotopic exchange reaction at 40.0 °C, using 1.000 g of ion exchange resins and 0.003 M labeled ionic solution, using Tulsion A-33 resin the values of specific reaction rate (min-1), amount of iodide ion exchanged (mmol), initial rate of iodide ion exchange (mmol/min) and log Kd were 0.229, 0.469, 0.107 and 10.6 respectively, which was higher than the values of 0.167, 0.375, 0.063 and 7.6 respectively as obtained by using Indion NSSR resins under identical experimental conditions. The overall results indicate superior performance of Tulsion A-33 over Indion NSSR resin under identical operational parameters.
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2

Singare, P. U. "Non Destructive Application of Radioactive Tracer Isotopes for Performance Evaluation of Industrial Grade Anion Exchange Resins Tulsion A-33 and Indion NSSR". International Letters of Chemistry, Physics and Astronomy 18 (28 settembre 2013): 50–62. http://dx.doi.org/10.56431/p-68axxp.

Testo completo
Abstract (sommario):
The present study deals with non-destructive application of radioactive tracer isotopes to evaluate the performance of Tulsion A-33 (nuclear grade) and Indion NSSR (non-nuclear grade) anion exchange resins. The performance evaluation was done by carrying out the iodide and bromide ion-isotopic exchange reactions using the above resins. It was observed that at a constant temperature of 40.0 °C, as the concentration of labeled iodide ion solution increases 0.001 M to 0.004 M, the percentage of iodide ions exchanged increases from 58.0% to 64.0% for Tulsion A-33 resins; and from 48.4% to 50.8% for Indion NSSR resins. Similarly in case of bromide ion-isotopic exchange reaction under identical experimental conditions, the percentage of bromide ions exchanged increases from 45.6% to 50.4% for Tulsion A-33 resin; and from 39.8% to 44.6% for Indion NSSR resin. It was also observed that during iodide ion-isotopic exchange reaction at 40.0 °C, using 1.000 g of ion exchange resins and 0.003 M labeled ionic solution, using Tulsion A-33 resin the values of specific reaction rate (min-1), amount of iodide ion exchanged (mmol), initial rate of iodide ion exchange (mmol/min) and log Kd were 0.229, 0.469, 0.107 and 10.6 respectively, which was higher than the values of 0.167, 0.375, 0.063 and 7.6 respectively as obtained by using Indion NSSR resins under identical experimental conditions. The overall results indicate superior performance of Tulsion A-33 over Indion NSSR resin under identical operational parameters.
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3

Singare, P. U. "Comparative Study of Anion Exchange Resins Purolite NRW-6000 and Duolite A-143 by Application Isotopic Technique". International Letters of Chemistry, Physics and Astronomy 17 (settembre 2013): 1–13. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.17.1.

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Abstract (sommario):
Isotopic tracer technique using 131I and 82Br was used to characterize Purolite NRW-6000 and Duolite A-143 anion exchange resins. The characterization study was done by carrying out iodide and bromide ion-isotopic exchange reactions taking place between the resin surface and the external labeled ionic solution. For the two resins it was observed that under identical experimental conditions, the values of specific reaction rate (min-1), amount of ion exchanged (mmol) and initial rate of ion exchange (mmol/min) were calculated to be lower for bromide ion-isotopic exchange reaction than that for iodide ion-isotopic exchange reaction. Also during both the ion-isotopic exchange reactions, under identical experimental conditions for the two resins, the values of specific reaction rate increases with increase in ionic concentration and was observed to decrease with rise in temperature. For a constant temperature of 35.0 °C, as the concentration of labeled bromide ion solution increases from 0.001 mol/L to 0.004 mol/L, the percentage of bromide ions exchanged increases from 67.80% to 72.76% using Purolite NRW-6000 resin and from 42.54% to 50.45% using Duolite A-143 resin. However when the temperature was raised from 30.0 °C to 45.0 °C by keeping the concentration of labeled bromide ion solution constant at 0.002 mol/L, the percentage of bromide ions exchanged decreases from 70.68 % to 67.32 % using Purolite NRW-6000 resin and from 47.50% to 42.25% using Duolite A-143 resin. From the results it appears that Purolite NRW-6000 resins show superior performance over Duolite A-143 resins under identical experimental conditions. It is expected that the present isotopic tracer technique can be applied further as an efficient nondestructive technique in characterization of various ion exchange resins so as to bring about their efficient industrial applications.
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4

Singare, P. U. "Comparative Study of Anion Exchange Resins Purolite NRW-6000 and Duolite A-143 by Application Isotopic Technique". International Letters of Chemistry, Physics and Astronomy 17 (7 settembre 2013): 1–13. http://dx.doi.org/10.56431/p-0x5o7d.

Testo completo
Abstract (sommario):
Isotopic tracer technique using 131I and 82Br was used to characterize Purolite NRW-6000 and Duolite A-143 anion exchange resins. The characterization study was done by carrying out iodide and bromide ion-isotopic exchange reactions taking place between the resin surface and the external labeled ionic solution. For the two resins it was observed that under identical experimental conditions, the values of specific reaction rate (min-1), amount of ion exchanged (mmol) and initial rate of ion exchange (mmol/min) were calculated to be lower for bromide ion-isotopic exchange reaction than that for iodide ion-isotopic exchange reaction. Also during both the ion-isotopic exchange reactions, under identical experimental conditions for the two resins, the values of specific reaction rate increases with increase in ionic concentration and was observed to decrease with rise in temperature. For a constant temperature of 35.0 °C, as the concentration of labeled bromide ion solution increases from 0.001 mol/L to 0.004 mol/L, the percentage of bromide ions exchanged increases from 67.80% to 72.76% using Purolite NRW-6000 resin and from 42.54% to 50.45% using Duolite A-143 resin. However when the temperature was raised from 30.0 °C to 45.0 °C by keeping the concentration of labeled bromide ion solution constant at 0.002 mol/L, the percentage of bromide ions exchanged decreases from 70.68 % to 67.32 % using Purolite NRW-6000 resin and from 47.50% to 42.25% using Duolite A-143 resin. From the results it appears that Purolite NRW-6000 resins show superior performance over Duolite A-143 resins under identical experimental conditions. It is expected that the present isotopic tracer technique can be applied further as an efficient nondestructive technique in characterization of various ion exchange resins so as to bring about their efficient industrial applications.
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5

Singare, P. U. "Nondestructive Radioactive Tracer Technique in Characterization of Anion Exchange Resins Purolite NRW-8000 and Duolite A-368". International Letters of Chemistry, Physics and Astronomy 17 (settembre 2013): 14–27. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.17.14.

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Abstract (sommario):
Radioactive tracer isotopes 131I and 82Br were used to characterize anion exchange resins Purolite NRW-8000 and Duolite A-368 by application of nondestructive technique. The resin characterization was based on their performance during iodide and bromide ion-isotopic exchange reactions. It was observed that during the iodide ion-isotopic exchange reaction at a constant temperature of 40.0 °C, as the concentration of labeled iodide ion solution increases from 0.001 mol/L to 0.004 mol/L, the percentage of iodide ions exchanged increases from 62.10% to 68.10 % using Purolite NRW-8000 resins and from 44.20% to 46.80% using Duolite A-368 resins. Also at a constant temperature of 40.0 °C, 1.000 g of ion exchange resins and 0.003 mol/L labeled iodide ion solution, the values of specific reaction rate (min-1), amount of iodide ion exchanged (mmol), initial rate of iodide ion exchange (mmol/min) and log Kd were calculated as 0.260, 0.500, 0.130 and 11.8 respectively for Purolite NRW-8000 resin, which was higher than the respective values of 0.130, 0.345, 0.045 and 6.7 as that obtained for Duolite A-368 resins. The similar trend was observed for the two resins during bromide ion-isotopic exchange reaction. From the overall results it appears that under identical experimental conditions, Purolite NRW-8000 resins show superior performance over Duolite A-368 resins. It is expected here that the present nondestructive technique can be extended further for characterization of different industrial grade ion exchange resins, which will help in their selection for specific industrial application.
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6

Singare, P. U. "Nondestructive Radioactive Tracer Technique in Characterization of Anion Exchange Resins Purolite NRW-8000 and Duolite A-368". International Letters of Chemistry, Physics and Astronomy 17 (7 settembre 2013): 14–27. http://dx.doi.org/10.56431/p-96r7u1.

Testo completo
Abstract (sommario):
Radioactive tracer isotopes 131I and 82Br were used to characterize anion exchange resins Purolite NRW-8000 and Duolite A-368 by application of nondestructive technique. The resin characterization was based on their performance during iodide and bromide ion-isotopic exchange reactions. It was observed that during the iodide ion-isotopic exchange reaction at a constant temperature of 40.0 °C, as the concentration of labeled iodide ion solution increases from 0.001 mol/L to 0.004 mol/L, the percentage of iodide ions exchanged increases from 62.10% to 68.10 % using Purolite NRW-8000 resins and from 44.20% to 46.80% using Duolite A-368 resins. Also at a constant temperature of 40.0 °C, 1.000 g of ion exchange resins and 0.003 mol/L labeled iodide ion solution, the values of specific reaction rate (min-1), amount of iodide ion exchanged (mmol), initial rate of iodide ion exchange (mmol/min) and log Kd were calculated as 0.260, 0.500, 0.130 and 11.8 respectively for Purolite NRW-8000 resin, which was higher than the respective values of 0.130, 0.345, 0.045 and 6.7 as that obtained for Duolite A-368 resins. The similar trend was observed for the two resins during bromide ion-isotopic exchange reaction. From the overall results it appears that under identical experimental conditions, Purolite NRW-8000 resins show superior performance over Duolite A-368 resins. It is expected here that the present nondestructive technique can be extended further for characterization of different industrial grade ion exchange resins, which will help in their selection for specific industrial application.
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7

Singare, P. U. "Radiotracer Technique in Study of Strongly Basic Anion Exchange Resins Dowex-SBR LC and Indion-454". International Letters of Chemistry, Physics and Astronomy 18 (settembre 2013): 37–49. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.18.37.

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Abstract (sommario):
The present paper demonstrates application of isotopic tracer technique in characterization of anion exchange resins Dowex-SBR LC and Indion-454 for which 131I and 82Br radio isotopes were used. The characterization was made based on iodide and bromide ion-isotopic exchange reaction kinetic data obtained for the two resins. It was observed that during iodide ion-isotopic exchange reaction performed at 35.0 °C, 1.000 g of ion exchange resins and 0.002 mol/L labeled iodide ion solution, the values of specific reaction rate (min-1), amount of ion exchanged (mmol), initial rate of ion exchange (mmol/min) and log Kd were 0.379, 0.426, 0.161 and 16.2 respectively for Dowex-SBR LC resin, which was higher than the respective values of 0.156, 0.243, 0.038 and 13.4 as that obtained by using Indion-454 resins. The identical trend was observed for the two resins during bromide ion-isotopic exchange reaction. The results of present investigation also indicate that during the two ion-isotopic exchange reactions, for both the resins, there exists a strong positive linear correlation between amount of ions exchanged and concentration of ionic solution; and strong negative correlation between amount of ions exchanged and temperature of exchanging medium. Based on overall results it appears that under identical experimental conditions, as compared to Indion-454 resins, Dowex-SBR LC resins show superior performance. It is expected here that the present technique can be extended further for characterization of different ion exchange resins which will further help in the selection of those reins for the specific industrial application
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8

Singare, P. U. "Radiotracer Technique in Study of Strongly Basic Anion Exchange Resins Dowex-SBR LC and Indion-454". International Letters of Chemistry, Physics and Astronomy 18 (28 settembre 2013): 37–49. http://dx.doi.org/10.56431/p-p17eh4.

Testo completo
Abstract (sommario):
The present paper demonstrates application of isotopic tracer technique in characterization of anion exchange resins Dowex-SBR LC and Indion-454 for which 131I and 82Br radio isotopes were used. The characterization was made based on iodide and bromide ion-isotopic exchange reaction kinetic data obtained for the two resins. It was observed that during iodide ion-isotopic exchange reaction performed at 35.0 °C, 1.000 g of ion exchange resins and 0.002 mol/L labeled iodide ion solution, the values of specific reaction rate (min-1), amount of ion exchanged (mmol), initial rate of ion exchange (mmol/min) and log Kd were 0.379, 0.426, 0.161 and 16.2 respectively for Dowex-SBR LC resin, which was higher than the respective values of 0.156, 0.243, 0.038 and 13.4 as that obtained by using Indion-454 resins. The identical trend was observed for the two resins during bromide ion-isotopic exchange reaction. The results of present investigation also indicate that during the two ion-isotopic exchange reactions, for both the resins, there exists a strong positive linear correlation between amount of ions exchanged and concentration of ionic solution; and strong negative correlation between amount of ions exchanged and temperature of exchanging medium. Based on overall results it appears that under identical experimental conditions, as compared to Indion-454 resins, Dowex-SBR LC resins show superior performance. It is expected here that the present technique can be extended further for characterization of different ion exchange resins which will further help in the selection of those reins for the specific industrial application
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9

Singare, P. U. "Application of Nondestructive Radio Tracer Technique in Performance Evaluation of Anion Exchange Resins Duolite ARA-9366 and Duolite A-171". International Letters of Chemistry, Physics and Astronomy 18 (settembre 2013): 63–76. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.18.63.

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Abstract (sommario):
Radio analytical technique as a non-destructive technique was used in the present investigation to trace the kinetics of ion-isotopic exchange reaction taking place in Duolite ARA-9366 (nuclear grade) and Duolite A-171 (non-nuclear grade) anion exchange resins. The kinetics data suggest that during iodide ion-isotopic exchange reactions under identical experimental conditions of 40.00C, 1.000 g of ion exchange resins and 0.003 M labeled iodide ion solution, the values of specific reaction rate (min-1), amount of iodide ion exchanged (mmol), initial rate of iodide ion exchange (mmol/min) and log Kd were 0.176, 0.383, 0.067 and 7.8 respectively for Duolite ARA-9366 resin, which was higher than 0.142, 0.353, 0.050 and 7.0 respectively as that obtained for Duolite A-171 resins. Also it is observed that at a constant temperature of 40.0 °C, as the concentration of labeled iodide ion solution increases 0.001 M to 0.004 M, the percentage of iodide ions exchanged increases from 49.20% to 51.80% for Duolite ARA-9366 resins; and from 45.20% to 47.80% for Duolite A-171 resins. The similar trend was observed for the two resins during bromide ion-isotopic exchange reactions. The overall results indicate superior performance of Duolite ARA-9366 resins over Duolite A-171 resins under identical operational parameters.
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10

Singare, P. U. "Application of Nondestructive Radio Tracer Technique in Performance Evaluation of Anion Exchange Resins Duolite ARA-9366 and Duolite A-171". International Letters of Chemistry, Physics and Astronomy 18 (28 settembre 2013): 63–76. http://dx.doi.org/10.56431/p-952oxf.

Testo completo
Abstract (sommario):
Radio analytical technique as a non-destructive technique was used in the present investigation to trace the kinetics of ion-isotopic exchange reaction taking place in Duolite ARA-9366 (nuclear grade) and Duolite A-171 (non-nuclear grade) anion exchange resins. The kinetics data suggest that during iodide ion-isotopic exchange reactions under identical experimental conditions of 40.00C, 1.000 g of ion exchange resins and 0.003 M labeled iodide ion solution, the values of specific reaction rate (min-1), amount of iodide ion exchanged (mmol), initial rate of iodide ion exchange (mmol/min) and log Kd were 0.176, 0.383, 0.067 and 7.8 respectively for Duolite ARA-9366 resin, which was higher than 0.142, 0.353, 0.050 and 7.0 respectively as that obtained for Duolite A-171 resins. Also it is observed that at a constant temperature of 40.0 °C, as the concentration of labeled iodide ion solution increases 0.001 M to 0.004 M, the percentage of iodide ions exchanged increases from 49.20% to 51.80% for Duolite ARA-9366 resins; and from 45.20% to 47.80% for Duolite A-171 resins. The similar trend was observed for the two resins during bromide ion-isotopic exchange reactions. The overall results indicate superior performance of Duolite ARA-9366 resins over Duolite A-171 resins under identical operational parameters.
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Tesi sul tema "Ion exchange resins"

1

Houghton, Mark Phillip. "Polymer-supported reactions using ion-exchange resins". Thesis, Lancaster University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.255343.

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2

Abonijim, M. N. "Ion exchange properties of poly(vinylimidazoline) resins". Thesis, University of Salford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381642.

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3

Pearson, C. H. G. "New ion exchange resins for ion chromatography applied to anions". Thesis, University of Kent, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372771.

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4

Leonard, Danièle. "Adsorption of bile acids by ion-exchange resins". Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74309.

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Abstract (sommario):
The interactions of cholestyramine with bile acids in aqueous buffer solutions were studied by in vitro adsorption experiments. Application of the Donnan theory, which is based on ion partitioning between two phases, indicates that the adsorption is an ion-exchange process--the bile acid anion displaces the chloride counter-ion of cholestyramine. Donnan considerations indicate that the bile acid in the resin phase exists in two forms, bound and unbound, but at higher Ceq the bound form is increasingly favoured. Since the concentrations of bound bile acid in the resin phase are above the critical micellar concentration, micelle-type ordering is occurring. It is also possible that the unbound bile acid in the resin phase aggregates to form "regular" micelles. The micellization promotes the partitioning of glycocholic acid into the resin phase, explaining the ability of cholestyramine to adsorb glycocholic acid significantly, in vitro.
Ion-exchange resins were prepared by solid phase peptide synthesis with active sites chosen to resemble those of cholestyramine. They were produced by coupling 4-(aminomethyl)benzoic acid, 4-aminophenylacetic acid or 4-(aminomethyl)phenylacetic acid to the backbone. The ion-exchange resins were prepared both as primary amines and in the quaternized form. The cholestyramine-like sorbents were synthesized with systematic changes in the structure, to determine which structural parts of cholestyramine are involved in the adsorption process. As compared to cholestyramine, both sets of resins were remarkably ineffective in adsorbing bile acids in vitro. It was found that the nature of the backbone determines the accessibility to the active site; that the resins with the methylene group positioned between the phenyl group and the amino group have higher adsorption capacity for glycocholic acid; and that quaternization increases the adsorption capacity. The two latter observations indicate the importance of the basicity of the active site. Therefore, in cholestyramine, the backbone is such that it permits the transfer of ionic species and the quaternary ammonium group is involved in the interaction with bile acids.
Computer modelling showed that the cholestyramine pendants are close to one another and are separated by benzene rings, thus leaving too little space between them to allow a bile acid molecule to interact with the benzene rings. Therefore, the bile acids must interact with the quaternary ammonium group, leaving the bile acid molecule inside the cavity where they interact with one another to form micelles. The possible modes of interactions of bile acids with the synthesized resins are more numerous since the pendants are not as close together. (Abstract shortened by UMI.)
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5

Ntemi, Pascal Vitalis. "Taste masking of clarithromycin with ion exchange resins". Thesis, Rhodes University, 2017. http://hdl.handle.net/10962/65178.

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6

Rejaldien, Moegamat Zain. "Base metal equilibrium prediction on ion exchange resin". Thesis, Cape Technikon, 2002. http://hdl.handle.net/20.500.11838/875.

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Thesis (MTech (Chemical Engineering)--Cape Technikon, Cape Town, 2002
This study is the first phase of an investigation into an alternative process to recover base metals from solution, namely ion exchange. An identified ion exchange resin was employed to study the recovery of copper, nickel and cobalt from electrolytic solutions. The main focus of the investigation was the prediction of equilibrium conditions in this multi-component system using a batch configuration. In order to predict equilibrium conditions. existing multi-component isotherms such as Fritz and Schleunder were tested. It has been shown that traditional isothem15 did not accurately predict equilibrium conditions. hence the need for development of new isotherms. Essentially two approaches were followed in the development of new isotherms namely. an effective concentration approach as well as a heat transfer approach. Both yielded positive outcomes with the effective concentration approach proving to be the most accurate. In addition to these two approaches a thermodynamical approach was also tested which also showed favourable predictions for Cu loading
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7

Omar, Mokhtar Bukhres. "Synthesis and ion exchange properties of polydithiocarbamate chelating resins". Thesis, University of Salford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327923.

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8

Strangfeld, Vinzenz Klaus. "The recovery of metal cyanides by ion exchange resins". Thesis, Cape Technikon, 2000. http://hdl.handle.net/20.500.11838/882.

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Thesis (MTech (Chemical Engineering))--Cape Technikon, Cape Town, 2000
Cyanide is used extensively in the mining industry to leach gold and silver from their ores. Cyanide, in the form of sodium or potassium cyanide, is added in excess to that required theoretically due to equilibrium and kinetic considerations in the leaching step. This results in free cyanide and various other cyanide complexes reporting to the effluent streams of these operations In this study the removal of these species from solution by means of ion exchange resins was investigated Equilibrium conditions, kinetic parameters and the competitive exchange nature of the process was evaluated. The experimental work focused on contacting the various resins individually in a batch reactor with free cyanide, Iron cyanide and copper cyanide complexes. The experimental data obtained was found to be well explained by the Freundlich-type multiand single-component isotherms. Furthermore, mass transfer parameters were investigated revealing that ceI1ain cyanide species outperform others kinetically in the ion exchange process. During this study it was shown that ion exchange processes could be effective in effluent clean-up of those streams containing cyanide complexes
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9

Kogovsek, Laurie Maylish. "Magnetic resonance imaging of elastomers and ion exchange resins". Case Western Reserve University School of Graduate Studies / OhioLINK, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=case1057869238.

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10

Hackney, Paul Anthony. "An investigation of the destruction of ion exchange resins". Thesis, Aston University, 1992. http://publications.aston.ac.uk/9754/.

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Ion exchange resins are used for many purposes in various areas of science and commerce. One example is the use of cation exchange resins in the nuclear industry for the clean up of radioactively contaminated water (for example the removal of 137Cs). However, during removal of radionuclides, the resin itself becomes radioactively contaminated, and must be treated as Intermediate Level Waste. This radioactive contamination of the resin creates a disposal problem. Conventionally, there are two main avenues of disposal for industrial wastes, landfill burial or incineration. However, these are regarded as inappropriate for the disposal of the cation exchange resin involved in this project. Thus, a method involving the use of Fenton's Reagent (Hydrogen Peroxide/soluble Iron catalyst) to destroy the resin by wet oxidation has been developed. This process converts 95% of the solid resin to gaseous CO2, thus greatly reducing the volume of radioactive waste that has to be disposed of. However, hydrogen peroxide is an expensive reagent, and is a major component of the cost of any potential plant for the destruction of ion exchange resin. The aim of my project has been to discover a way of improving the efficiency of the destruction of the resin thus reducing the cost involved in the use of hydrogen peroxide. The work on this problem has been concentrated in two main areas:-1) Use of analytical techniques such as NMR and IR to follow the process of the hydrogen peroxide destruction of both resin beads and model systems such as water soluble calixarenes. 2) Use of various physical and chemical techniques in an attempt to improve the overall efficiency of hydrogen peroxide utilization. Examples of these techniques include UV irradiation, both with and without a photocatalyst, oxygen carrying molecules and various stirring regimes.
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Libri sul tema "Ion exchange resins"

1

Kunin, Robert. Ion exchange resins. Malabar, Fla: R.E. Krieger Pub. Co., 1985.

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2

Kunin, Robert. Ion exchange resins. 2a ed. Malabar, Fla: R.E. Krieger, 1990.

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3

Guter, Gerald A. Selenium selectivity in ion exchange resins. Sacramento, Calif: San Joaquin Valley Drainage Program, 1988.

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4

Abonijim, Mohammed Nijim. Ion exchange properties of poly(vinylimidazoline) resins. Salford: University of Salford, 1987.

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5

Simister, Claire. The thermal degradation of ion exchange resins. Sudbury, Ont: Laurentian University, 2003.

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6

Sainio, Tuomo. Ion-exchange resins as stationary phase in reactive chromatography. Lappeenranta: Lappeenranta University of Technology, 2005.

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7

Wrotnowski, Cort. Ion exchange technology: Problems, progress, opportunities. Norwalk, CT: Business Communications Co., 1995.

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8

Moldenhauer, Maxine Gay. Microencapsulation of Ion exchange resins with Ethyl Cellulose. [Toronto: s.n.], 1988.

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9

Omar, Mokhtar Bukhres. Synthesis and ion exchange properties of polydithiocarbamate chelating resins. Salford: University of Salford, 1988.

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10

Handbook of ion exchange resins: Their application to inorganic analytical chemistry. Boca Raton, Fla: CRC Press, 1989.

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Capitoli di libri sul tema "Ion exchange resins"

1

Yamanaka, Koji. "Ion-Exchange Resins". In Encyclopedia of Polymeric Nanomaterials, 1–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-36199-9_131-1.

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Gooch, Jan W. "Ion-Exchange Resins". In Encyclopedic Dictionary of Polymers, 396. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_6444.

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Yamanaka, Koji. "Ion-Exchange Resins". In Encyclopedia of Polymeric Nanomaterials, 1019–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-29648-2_131.

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Gooch, Jan W. "Ion-Exchange Resins". In Encyclopedic Dictionary of Polymers, 902. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_14049.

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Schwandt, P., e W. O. Richter. "Ion Exchange Resins". In Handbook of Experimental Pharmacology, 401–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78426-2_14.

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Biswas, Mukul, e S. Packirisamy. "Synthetic ion-exchange resins". In Key Polymers Properties and Performance, 71–118. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/3-540-15481-7_8.

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Fazal-Ur-Rehman e Sheeba Nuzhat Khan. "Therapeutic Applications of Ion Exchange Resins". In Ion Exchange Technology II, 149–68. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4026-6_7.

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Jārnstrōm, Risto. "Microbiological Treatment of Radioactive Waste Ion Exchange Resins". In Ion Exchange Advances, 245–49. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2864-3_32.

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Carrà, Sergio. "Reaction Processes Involving Ion-Exchange Resins". In Ion Exchange: Science and Technology, 485–511. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4376-6_18.

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Fazal-Ur-Rehman e Sheeba Nuzhat Khan. "Application of Ion Exchange Resins in Kidney Dialysis". In Ion Exchange Technology II, 169–82. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4026-6_8.

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Atti di convegni sul tema "Ion exchange resins"

1

Baltaeva, M. B., A. M. Manakhov, D. K. Cha e S. C. Ayirala. "Polymeric Waste-Based Ion-Exchange Resins: A Sustainable Solution for Produced Water Treatment". In SPE Water Lifecycle Management Conference and Exhibition. SPE, 2024. http://dx.doi.org/10.2118/219000-ms.

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Abstract One of the most crucial strategies for reducing the negative environmental effects of water production in oil operations is to identify innovative and cost-efficient techniques for purifying produced water while minimizing the amount of its disposal into the environment. The proposed solution for polymeric waste and its recycling into ion exchange resin allows the removal of monovalent ions from produced water. The obtained purified produced water can be utilized as injection water for waterflooding/smart water flooding or frac-water for unconventionals to contribute towards circular water economy in alignment with the Zero-Liquid-Discharge (ZLD) water management strategy. Discarded expanded polystyrene was selected as a viable substitute material source for ion exchange resins due to its abundance and low cost. Polymeric matrixes are made by collecting and dissolving polystyrene waste in an organic solvent, then forming beads using a microdroplet precipitation technique. A strongly basic anion-exchange resin (SBA) containing amine groups is produced using the amine plasma modification method combined with chemical treatment. Using the plasma sulfonation approach with surface treatment, a strongly acidic cation-exchange resin (SAC) with a high surface area and sulfonic groups is created. The SBA resin is utilized for sulfate-ions removal, while SAC can be applied to remove the sodium-ions. The polystyrene beads production process was scaled up using an in-house state-of-the-art encapsulator instrument. It has been demonstrated that achieving spherical beads without agglomeration requires the proper concentration of polystyrene waste and a filler in a solution. To increase surface area and functionalization efficiency, polystyrene beads were milled. The resultant porous beads are 300–750 microns in size. The performance of the resulting resin samples was analyzed according to industry standards using column tests. The optimal parameters of plasma sulfonation and chemical treatment procedures for SAC formation and plasma amination process for SBA creation were identified. The resins prepared from expanded polystyrene waste demonstrated effective capacity for both cation and anion exchange processes. More than 80% of the sodium ions and the sulfate ions in synthetic brine could be removed by the created strong-acidic cation-exchange and strong base anion-exchange resins, respectively. A new method of polymeric waste-based ion-exchange resins creation with characteristics similar to commercially available ion-exchange resins has been discovered. The development of these sustainable ion-exchange resins holds great promise for produced water treatment and recycle, providing an environmentally friendly and effective solution and reusing plastic waste.
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Baltaeva, Madina, Maxim Orlov, Dong Kyu Cha e Subhash Ayirala. "Sustainable Ion-Exchange Resins for Produced Water Treatment". In Middle East Oil, Gas and Geosciences Show. SPE, 2023. http://dx.doi.org/10.2118/213239-ms.

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Abstract Produced water is by far the largest by product by volume associated with oil and gas production. To minimize environmental impact of the produced water disposal, reuse produced water, and fulfill the targeted Zero-Liquid-Discharge approach, it is necessary to develop new economically viable technologies for water purification. The objectives of the research enclose development of the sustainable ion-exchange resin from the discarded expanded polystyrene via a multi-stage process with plasma treatment. The process of sustainable ion-exchange resins’ preparation includes several consecutive steps. At first, a polystyrene waste is collected and dissolved in an organic solvent.After that the polymeric beads are prepared using a microdroplet precipitation mechanism. Then, one part of the polystyrene beads is modified with the green gas-liquid interfacial plasma (GLIP) sulfonation process producing a strong acidic cation exchange resin. The other part is functionalized by amine groups in cyclopropylamine medium producing strong basic anion exchange resin. Robust and self-sustained process for creating the polystyrene beads was developedusing the «solvent-non-solvent» system. The bead formation process is realized by a controlled, laminar liquid jet broken into equally sized beads by vibrations at optimized frequency value. This process was performed using the in-house state-of-the-art encapsulator instrument. The concentration of waste expanded polystyrene and a filler in a solution was optimized. The size of obtained porous beads was measure around 750-1000 micron and can be controlled by the nozzle size and frequency of vibration. The research describes a new method of sustainable ion-exchange resin creation. The utilization of this novel material is a beneficial approach to re-use plastic waste and reuse it to clean produced water from dissolved salts. Moreover, plasma technology that is used for polystyrene treatment is probably the most versatile surface treatment technique and, moreover, it is environmentally friendly.
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Li, Shaobin, Hailin Cao, Pavle Krivenko, Oleg Petropavlovskii e Luqian Weng. "Geocement immobilization of radioactive waste ion-exchange resins". In 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/ifeesm-17.2018.109.

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Gressier, Fre´de´ric, Jan van der Lee, He´le`ne Schneider, Martin Bachet e Hubert Catalette. "Optimizing Liquid Waste Treatment Processing in PWRS: Focus on Modeling of the Variation of Ion-Exchange Resins Selectivity Coefficients". In The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7116.

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A bibliographic survey has highlighted the essential role of selectivity on resin efficiency, especially the variation of selectivity coefficients in function of the resin saturation state and the operating conditions. This phenomenon has been experimentally confirmed but is not yet implemented into an ion-exchange model specific for resins. This paper reviews the state of the art in predicting sorption capacity of ion-exchange resins. Different models accounting for ions activities inside the resin phase are available. Moreover, a comparison between the values found in the literature and our results has been done. The results of sorption experiments of cobalt chloride on a strong cationic gel type resin used in French PWRs are presented. The graph describing the variation of selectivity coefficient with respect to cobalt equivalent fraction is drawn. The parameters determined by the analysis of this graph are injected in a new physico-chemical law. Implementation of this model in the chemical speciation simulation code CHESS enables to study the overall effect of this approach for the sorption in a batch.
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Tatranský, Peter, Milena Pražská e Dávid Harvan. "Solidification of Spent Ion Exchange Resins Into the SIAL® Matrix at the Dukovany NPP, Czech Republic". In ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icem2013-96045.

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Based on the decision of the State Office for Nuclear Safety, the Dukovany NPP has been obliged to secure the efficient capacities for the disposal of spent ion exchange resins. Therefore, in September 2010, based on the contract with supplier company AMEC Nuclear Slovakia s.r.o. has begun with pumping and treatment of ion exchange resins from the storage tank 0TW30B02, situated in the auxiliary building. The SIAL® technology, developed in AMEC Nuclear Slovakia, has been used for the solidification purposes. This technology allows an on-site treatment of various special radioactive waste streams (resins, sludge, sludge/resins and borates) at the room temperature. The SIAL® matrix and technology were licensed by the Czech State Office for Nuclear Safety in 2007. On-site treatment and solidification of spent ion exchange resins at Dukovany NPP involves process of resin removal from tank using remotely operated manipulator, resin transportation, resin separation from free water, resin filling into 200 dm3 drums and solidification into SIAL® matrix in 200 dm3 drums using the FIZA S 200 facility. The final product is observed for compressive strength, leachability, radionuclide composition, dose rate, solids and total weight. After meeting the requirements for final disposal and consolidation, the drums are being transported for the final disposal to the Repository at Dukovany site. During the 3 month’s trial operation in 2010, and the normal operation in 2011 and 2012, 189 tons of dewatered resins have been treated into 1960 drums, with total activity higher than 920 GBq. At the end of trial run (2010), 22 tons of dewatered resins were treated into 235 drums. During standard operation approximately 91 tons in 960 drums (2011) and 76 tons in 765 drums (2012) were treated. The weights of resins in the drum ware in the range from 89–106 kg and compressive strength limit (10 MPa) has already been achieved 24 hours after fixation. The final measured strength values ranged from 19.0–34.7 MPa and real leachability values ranged from 0.03–0.65%, far below the 4% limit value. Collective effective dose of all workers in 2012 was 7.7 mSv (12.6 mSv in 2011, 6.2 mSv in 2010). Average individual effective dose in 2012 was 0.55 mSv (14 workers), and maximal individual effective dose was 2.25 mSv. This approach allows fast, safe and cost effective immobilization and transformation of dangerous radioactive waste such as sludge and resins into the solid form, which is suitable for long term storage or disposal.
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Li, Junfeng, e Jianlong Wang. "Cementation of Radioactive Waste Resin by Calcium Sulfoaluminate Cement". In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75197.

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Spent radioactive ion-exchange resin (SIER) is a long-standing issue for radioactive waste management safety. Performance of radioactive waste form is featured with extra long-term and non-repairable. Calcium sulfoaluminate cement (SAC) was used in radioactive spent resins solidification in China. A prescription of X SAC cement + 0.5X waste resins (50%water hold) + 0.35X water was obtained first. In order to control the temperature rise caused by hydration of cement in 200L solidification matrix, various supplementary materials were tried. Based on compressive strength tests and center temperature rise, super powered zeolite was selected. In addition, more resins were added to reduce the center temperature rise. A superior combination was obtained as SAC 35wt.%, zeolite 7wt.% to mix 42wt.% of resins (50%water hold) with 16wt.% of water. The microstructures of hydrated Ordinary Portland Cement (OPC), SAC and SAC with different zeolite addition were compared by means of Scanning Electron Microscopy (SEM). From the SEM pictures, the structures of the needles or spines can be seen in SAC matrices and the needles structure of SAC change into flake structure gradually with more zeolite added. The simulated leaching tests showed that inclusion of zeolite in SAC reduced the leaching rates of radionuclides significantly. From 200L matrix test, the centre temperature curve was measured, and the highest temperature was lower than 90°C. No thermal cracks were found in the final solidified products. The effect of radiation on compressive strength and radiolysis gas generation was studied for cement solidified form of various content of ion exchange resin with Co-60 irradiator. Variation of compressive strength, as well as the compressive strength of the waste form both with and without irradiation all within the standards requirement under irradiation of 106 Gy. However, the data obtained for ion exchange resin shows that hydrogen generation under irradiation of 105 Gy reached up to 3.5% of the total gas generated. This implies that the radioactivity of spent ion exchange resin shall be limited for long term storage and disposal with High-Integrity-Container. Calculation demonstrates that cement solidification of spent radioactive ion exchange resin existing in China so far should not result in radiation stability concern. It is concluded that SAC is one of the preferential binding material for ion exchange resins, the resin loading can be up to 75 (vol%) (wet resin). It is recommended that the performance requirement for cement solidified radioactive form shall be amended and guidelines for performance characterization in certain detail should be established. Biodegradation of cement solidified resin waste would be a safety concern and shall be investigated. Modeling of leaching should be promoted.
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Forgrave, Rebecca K., Kassia L. Groszewski, Angela H. Chung e Emily M. Elliott. "QUANTIFYING URBAN ATMOSPHERIC NITROGEN DEPOSITION FLUXES USING ION EXCHANGE RESINS". In Joint 52nd Northeastern Annual Section and 51st North-Central Annual GSA Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017ne-291533.

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Jiang, Shanquan, Xiangwei Sun, Lixing Ling, Shumin Wang, Wufeng Wu, Shihong Cheng, Yue Hu e Chunyan Zhong. "Preparation and characterization of (St-DVB-MAA) ion exchange resins". In GREEN ENERGY AND SUSTAINABLE DEVELOPMENT I: Proceedings of the International Conference on Green Energy and Sustainable Development (GESD 2017). Author(s), 2017. http://dx.doi.org/10.1063/1.4992937.

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Roth, Andreas. "Solidification of Radioactive Liquid Wastes: Treatment Options for Spent Resins and Concentrates". In ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2009. http://dx.doi.org/10.1115/icem2009-16405.

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Abstract (sommario):
Ion exchange is one of the most common and effective treatment methods for liquid radioactive waste. However, spent ion exchange resins are considered to be problematic waste that in many cases require special approaches and pre-conditioning during its immobilization to meet the acceptance criteria for disposal. Because of the function that they fulfill, spent ion exchange resins often contain high concentrations of radioactivity and pose special handling and treatment problems.
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Roth, Andreas, Baudouin Centner e Alain Lemmens. "Radioactive Spent Resins Conditioning by the Hot Super-Compaction Process". In The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7310.

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Spent ion exchanger media are considered to be problematic waste that, in many cases, requires special approaches and precautions during its immobilization to meet the acceptance criteria for disposal. The waste acceptance criteria define, among others, the quality of waste forms for disposal, and therefore will sometimes define appropriate treatment options. The selection of treatment options for spent ion exchange materials must consider their physical and chemical characteristics. Basically, the main methods for the treatment of spent organic ion exchange materials, following to pretreatment methods are: - Direct immobilization, producing a stable end product by using Cement, Bitumen, Polymer or High Integrity Containers, - The destruction of the organic compounds by using Thermochemical processes or Oxidation to produce an inorganic intermediate product that may or may not be further conditioned for storage and/or disposal, - The complete removal of the resin inner structural water by a thermal process. After a thorough technical economical analysis, Tractebel Engineering selected the Resin Hot Compaction Process to be installed at Tihange Nuclear Power Plant. The Resin Hot Compaction Process is used to make dense homogenous organic blocks from a wide range of particulate waste. In this process spent resins are first dewatered and dried to remove the inner structural water content. The drying takes place in a drying vessel that holds the contents of two 200 L drums (Figure). In the oil heated drying and mixing unit, the resins are heated to the necessary process temperature for the hot pressing step and then placed into special metal drums, which are automatically lidded and immediately transferred to a high force compactor. After high force compaction the pellets are transferred to a measuring unit, where the dose rate, height and weight are automatically measured and recorded. A volume reduction factor of approximately up to four (depending on the type of resins) is achievable using hot compaction techniques. This paper will describe the application of the Resin Hot Compaction Process, at Tihange NPP.
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Rapporti di organizzazioni sul tema "Ion exchange resins"

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Carlson, C. D., L. A. Bray e S. A. Bryan. Radiation testing of organic ion exchange resins. Office of Scientific and Technical Information (OSTI), settembre 1995. http://dx.doi.org/10.2172/127984.

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McConnell, J. W. Jr, D. A. Johnson e R. D. Sr Sanders. Radiation degradation in EPICOR-2 ion exchange resins. Office of Scientific and Technical Information (OSTI), settembre 1990. http://dx.doi.org/10.2172/6571510.

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Mattigod, Shas V., Elizabeth C. Golovich, Dawn M. Wellman, Elsa A. Cordova e Ronald M. Smith. Uranium Adsorption on Ion-Exchange Resins - Batch Testing. Office of Scientific and Technical Information (OSTI), dicembre 2010. http://dx.doi.org/10.2172/1009765.

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Ali, M., R. M. Doty e P. D. Kalb. Pretreatment and encapsulation of ion exchange resins in polyethylene. Office of Scientific and Technical Information (OSTI), ottobre 1994. http://dx.doi.org/10.2172/10130203.

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Duncan, J. B. Separation of organic ion exchange resins from sludge -- engineering study. Office of Scientific and Technical Information (OSTI), agosto 1998. http://dx.doi.org/10.2172/10148504.

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Baumann, E. W. Effects of Gamma Radiation on Individual and Mixed Ion Exchange Resins. Office of Scientific and Technical Information (OSTI), gennaio 2003. http://dx.doi.org/10.2172/806834.

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Parker, Kent E., Elizabeth C. Golovich e Dawn M. Wellman. Iodine adsorption on ion-exchange resins and activated carbons: batch testing. Office of Scientific and Technical Information (OSTI), settembre 2014. http://dx.doi.org/10.2172/1163822.

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Veazey, G. W., e R. L. Ames. Cement waste-form development for ion-exchange resins at the Rocky Flats Plant. Office of Scientific and Technical Information (OSTI), marzo 1997. http://dx.doi.org/10.2172/464187.

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Espinoza, Jacob, Mary Barr e Wayne Smith. Denitration of Rocky Flats Ion-Exchange Resins: Recommendation of Denitration Processes, October 19, 1995. Office of Scientific and Technical Information (OSTI), dicembre 1998. http://dx.doi.org/10.2172/2610.

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Uy, O. Manual. Synthesis and Characterization of Templated Ion Exchange Resins for the Selective Complexation of Actinide Ions. Office of Scientific and Technical Information (OSTI), marzo 2001. http://dx.doi.org/10.2172/781711.

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