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Showing 1 to 20 of 564 for “"Ion exchange"”.
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Development of a hybrid ion exchange-catalyst system to denitrify ion exchange waste brine
… by the EPA due to its harmful health impacts. Ion exchange (IX) is frequently used to treat nitrate and is very effective, but suffers from inefficiencies associated with the regeneration process. When the IX resin is saturated, it requires regeneration, which is accomplished through …
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Studies in ion exchange chromatography
This dissertation investigates three major problems in IC, ranging from the practical to the theoretical. The first is of interest to the field of quantitative analysis. Since ion chromatography is primarily a quantitative technique, the linear range of the detector is of particular interest. The …
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Magnetic adsorbents displaying switchable ion-exchange behaviour
Magnetic bioseparations based on non-porous adsorbents offer a low-fouling alternative to the porous materials required by conventional adsorbent separation techniques. Interest in magnetic bioseparations has been limited by the high cost of suitable magnetic absorbents. In this study a variety of …
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Prediction of multicomponent ion exchange a ternary system
… contaminated water, sulfate is the primary anion which affects the ionexchange system between nitrate and chloride anions. The generally accepted selectivity sequence [4, 11,14] for commercially available strong-base anion exchangers in dilute aqueous solution is sulfate > nitrate > chloride. …
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Determination of Hardness in Water by Ion Exchange
… of soap to form a lather or forms much incrustation on vessels in which it stands or is heated is commonly called hard water. Soap is precipitated chiefly by the calcium and magnesium ions commonly present in water; but it may also be precipitated by the ions of other polyvalent metals, such as …
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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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Wastewater treatment by novel hybrid biological – ion exchange processes
… the kinetic advantages and reliability of ion exchanging clinoptilolite in combination with biological treatment to remove ammonium from municipal sewage. A second process, HAMBgR (Hybrid Adsorption Membrane Biological Reactor), combines both ion exchange resin and bacteria into a single …
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The equilibria and kinetics of certain ion exchange systems
… desalinated using continuous countercurrent ion exchange systems, the design and structure of which depend largely on the resin types used, and in particular on their equilibrium and kinetic properties. In recent years new and improved resins, such as macroporous and high density resins, have …
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Treatment of plating plant wash waters by ion exchange
The treatment by ion exchange of the wash waters from a mixed electroplating operation has been investigated. The loading characteristics of a strong acid resin has been studied experimentally and by mathematical simulation. The ability to separate the loaded metals by complexation techniques …
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Ion exchange for the desalination and treatment of wastewater
Ion exchange for the desalination and tertiary treatment of waste water has involved the development of both the theory and practice of continuous countercurrent ion exchange (CCIX). The need for process development arose after a comprehensive review of the principles and properties of ion exchange …
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The regeneration of mixed ion exchange resins by electrodialysis
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Chemical Engineering, 1952.
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The removal of perchlorate from waters using ion-exchange resins
… the feasibility of using several types of ion-exchange resins to remove perchlorate from waters. The capability of the resins to remove perchlorate, as well as their regeneration efficiency, were evaluated using both synthetic solutions and perchlorate-contaminated water from the Las Vegas …
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Ion Exchange Selectivity of Clay Under Conditions Simulating Subsurface Environments
Made available in DSpace on 2014-12-11T18:10:11Z (GMT). No. of bitstreams: 1 7500443.pdf: 2470723 bytes, checksum: 8a335031320c9c7b4993e60ab3420742 (MD5) Previous issue date: 1974
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Analysis of Strength Variation in Glass Due to Ion Exchange
… was to compare the changes in statistical variation and Weibull characteristics of the strength of glass rods as modified by heat treatment with and without an ion exchange bath. Several sample groups of 30 sodium borosilicate glass rod specimens were heat treated at various temperatures in air …
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Kinetic Analysis of the Ion Exchange of Sodium from Subbituminous Coal
<p>The removal of Na from subbituminous coal by ion ex change was investigated on a batch basis with H-ion donated by dilute aqueous The exchange of K, Mg, Ca, and A1 from the coal was also observed. The four parameters stud ied were initial H2SC>4 concentration, coal particle size, residence time, …
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Studies into the ion exchange and intercalation properties of AlH2P3O10•2H2O
This thesis describes investigations performed into the ion exchange and intercalation properties of aluminium triphosphate, AlH\(_2\)P\(_3\)O\(_{10}\)•2H\(_2\)O (AlTP). Materials synthesised were characterised using a variety of techniques, including powder neutron and X-ray diffraction, Rietveld …
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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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