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Showing 1 to 19 of 19 for “"Cation-exchange resins"”.
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Hydrolysis of aluminum in synthetic cation exchange resins and dioctahedral vermiculite
The hydrolysis of aluminum in synthetic cation exchange resins differing in charge density was evaluated after treating aluminum and potassium saturated resins with solutions of hydrolyzed aluminum. Fixed aluminum and decrease in exchange capacity were used to calculate the OH/Al ratio of the fixed …
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Determination of Atrazine and Selected Respective Metabolites Using Strong Cation Exchange Resins
… for polar analytes. In this study strong cationic exchange (SCX) resins consisting of sulfonated polystyrene are investigated for their extraction capabilities of the selected analytes. By exploiting acid-base and pi-pi interactions the analytes are trapped and therefore extracted from …
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Ethyl isopropyl ether (EIPE) synthesis over cation exchange resins: catalyst evaluation and reaction kinetics
Includes bibliographical references (pages 122-127).
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Dry preservation of heavy metal contaminants using cation exchange resins for improved water quality monitoring
… field work, dry sampling sorbent identification and selection, kinetic parameter testing of the dry sampling sorbent, lab contaminant recovery protocol development and initial dry sampling device design for the dry storage of heavy metal cation contaminants. Heavy metals, such as lead, …
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LITERATURE REVIEW: The Use of Cation-Exchange Resins in Natural Water Trace Metals Research. ARTICLE: Determination of Free Ion Trace Metal Concentrations in Freshwaters Using Cation-Exchange Resin Equilibrium. A Preliminary Investigation.
… ligands and colloidal surfaces. Use of cation exchange resins, particularly Chelex-100, has been developed over the past few decades and enables preconcentration to yield, upon elution, measurable concentrations of trace metals. These resins can also yield data on the speciation (by …
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The isolation and characterization of a growth factor in rumen fluid for a strain of Butyrivibrio
… solvents and is retained in part on anion and cation exchange resins. It can be eluted from the resins with strong acid. It is stable to enzymatic hydrolysis by trypsin. Granular mucin or bovine saliva will partially replace the stimulatory activity. The part of the material which was not …
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The ion exchange behaviour of some trivalent cations in aqueous monoethanolamine
This investigation of the behaviour of cation exchange resins in aqueous monoethanolamine has led to some interesting conclusions regarding the influence of the solvent onion exchange resins. The main results and conclusions, which have been discussed in detail in the preceding chapters, will now …
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Preparation, characterization and carrier gas transport characteristics of inorganic and organic membranes for application in lactic acid esterification with ethanol.
… for most petrochemical solvents. The esterification process of lactic acid and ethanol to produce EL is an equilibrium-limiting reaction and the selective removal of one of the reaction products can be improved using a membrane reactor and when coupled with a heterogeneous catalyst offers an …
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Separation, preconcentration and determination of rare earth elements by inductively coupled plasma emission spectroscopy
… matrix elements was investigated using three cation exchange resins; Amber lite IR 120 (H), Zeocarb 225 and Dowex 50-WXS. A gradient acid elution method was established using a 15 cm by 20 mm Zeocarb 225 column. The sample was eluted with 140 ml of a 1.5 M H⁺ solution containing 0.75 M Cl⁻ and …
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An Investigation of the destruction of ion exchange resins
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 …
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Role of Flagellar Motility in Apple Blossom Invasion and Tactic Response to Various Plant Nectar Extracts by Erwinia Amylovora
… extracts were fractionated using anion and cation exchange resins and the organic acid fraction was silylated and chromatographed on 3% SE-52 column. The organic acids attracting E. amylovora in nectar extracts appear to be either fumaric or malic acid or a mixture of both. Concentrations of …
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Improving the selectivity of the radio-labelling of ion exchange resin tracers for positron emission particle tracking
… activity of radionuclides. Organic ion exchange resins are suitable tracer materials for PEPT experiments, and are usually labelled with ⁶⁸Ga at the laboratories of PEPT Cape Town. The labelling performance relies on the chemical and physical properties of organic strongly acidic cation …
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Chromatographic Separation of Carbohydrates
… are presented and examples of industrial applications reported. The general performance of zeolites, anion and cation exchange resins for the separation of carbohydrate mixtures using batch analytical techniques have been evaluated. A Semi-Continuous Counter-current Chromatographic Refiner …
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Fate and remediation of emerging organic contaminants in aquatic and soil environments
… was assessed using 14 commercially available ion-exchange (IX)/non-ionic resins and granular activated carbon (GAC). Among the selected adsorbents, anion exchange resins (AERs) exhibited significant adsorption of PFASs compared to cation exchange resins, non-ionic resins, and GAC regardless of the …
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INNOVATIVE SYSTEMS FOR THE MITIGATION OF RISKS: CATALYSTS AND SMART MATERIALS FOR DETECTION AND DECONTAMINATION OF HAZARDOUS CHEMICAL, BIOLOGICAL AND EXPLOSIVE SUBSTANCES
… within a system based on sulfonic acid cation exchange resins. After a simple contact treatment with an aqueous H2O2 solution, these resins demonstrated the ability to store oxidising species and release them over time. These systems exhibited potent biocidal efficacy against bacteria, …
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Novel Insights into Lead Corrosion Control: Safely Changing Source Waters, Effective Use of Zinc Phosphate Inhibitors, Electrochemical Reversal of Solder, and Significance of Lead-Polyphosphate Complexation
… water. A failure to understand the implications of these scenarios resulted in erroneous logic predicting that a source water change would be safe when it was not. We develop a proactive bench scale testing protocol and improved framework that can allow utilities to avoid similar mistakes …