ion exchange resin Articles

  • Enhanced Coagulation Using a Magnetic Ion Exchange Resin

    The objective of this investigation was to examine the effectiveness of a magnetic ion exchange resin (IVIIEXR) provided by ORICA Australia Pty Ltd. of Victoria, Australia to enhance the coagulation of disinfection by-product (DBP) precursors. The IVIIE)C resin purportedly adsorbs natural organic material, thereby lowering the coagulant demand of the water, as well as lowering its DBP formation ...


    By IXOM Watercare

  • Ion Exchange Systems.

    When properly applied, ion exchange for concentrated ion recovery is by far the best available technology. Where effluent streams can be filtered and ions requiring different regenerants can be segregated, ion exchange is usually the most cost effective and least capital intensive solution. We provide 4 levels of integration to cover most applications and capital budgets. The variations in the ...


  • Bioregeneration of Spent Ion-Exchange Resin Loaded with Nitrate/Perchlorate and Biofouling Removal

    A new process has been developed that regenerates perchlorate/nitrate-contaminated ionexchange resins (IX) biologically without requiring the use of brine. The process consists of directly contacting perchlorate/nitrate-loaded IX resin with a perchlorate/nitrate-reducing microbial culture under anoxic/anaerobic conditions leading to conversion of the perchlorate and nitrate load on the resin to ...

  • Impact of magnetic ion exchange resin pretreatment on alleviating UF membrane fouling

    The purpose of this study is to undestand the effect and mechanism of preventing ultrafiltration(UF) membrane fouling by using magnetic ion exchange resin (MIEX®) in terms of fractional compent and molecular weight of NOM. In the experiment, pretreatment decreasing trans-membrane pressure and preventing membrane fouling were studied. The result showed: when the MIEX® dosage reached 800 bed volume ...


    By IWA Publishing

  • Introduction to Ion Exchange Part 1

    IMPURITIES IN WATERWater is often referred to as the 'universal solvent' as it will dissolve small amounts of everything it touches. Water collects or dissolves a variety of mineral salts, organic compounds and suspended solids as it flows over the earth's surface and through the ground. These impurities make water undesirable for use in many applications. It is, therefore, important to ...


    By Kinetico Incorporated

  • White paper - Ion Exchange Theory

    Ion exchange is the removal of unwanted “charged” particles, called ions, from raw water. In this process the ions are transferred to a solid particle, called an ion exchanger, which accepts these ions while returning an equal number of desirable ions. The exchangers are made of porous plastic resin, which gives them many “exchange sites”. In the basic reaction, an ion ...


    By W2 Systems

  • A study on the distribution coefficient of bromide ions from aqueous solution on ion exchange resins Duolite A-101D and Duolite A-102D

    The ion exchange resins Duolite A-101D and Duolite A-102D in bromide form were equilibrated separately with labelled radioactive bromide ion solutions of different concentrations varying from 0.005 M to 0.100 M in the temperature range of 25.0°C to 45.0°C. The Kd values of bromide ions for Duolite A-102D were higher than that for Duolite A-101D under identical experimental conditions. The ...


    By Inderscience Publishers

  • Sorption of heavy metals by modified chelating ion exchangers

    Satisfactory sorption capacity towards heavy metals of several physically modified chelating resins at low pH is reported. It was found that the linear sorption isotherms are the most appropriate for describing the sorption of Ni and Pb. The data obtained revealed that the chelating resins studied are able to remove selectively copper from a complex synthetic solution containing Fe, Mn and Pb. ...


    By Inderscience Publishers

  • An Evaluation of Magnetic Ion Exchange (MIEX®) for NOM Removal

    A new process for the removal of natural organic matter (NOM) was developed in Australia by Orica Watercare and South Australian Water Corporation. It employs a strongly basic anion exchange resin to remove NOM from water. In the first stage of the process, the (180 μm) MIEX® resin is mixed with the water to be treated and its small size encourages rapid removal of NOM. The resin beads also ...


    By IXOM Watercare

  • New ion exchange processes for brine purification

    Three new ion exchange processes have recently been developed for purification of brine. The PDP (precipitator dust purification) process removes chloride contamination from byproduct sodium sulphate recovered from the electrostatic precipitator ofakraft pulp mill's recovery boiler. The BDS (brine de-sulphurization) process removes sulphate impurities from chlor-alkali cell brines, while a novel ...


    By Eco-Tec Inc.

  • Ionex- Versatile ion exchange technology for Nitrate removal

    Belgian separations technology company PuriTech (www.puritech.be) has designed an ion exchange system that improves liquid–resin contact efficiency while reducing plant operating costs and capital expenditure. Targeted at a broad range of industries, one area where the system is now showing its strength is in the removal of nitrates from drinking water, asPuriTech's Filip ...


    By PuriTech Ltd

  • Recent Papers in Adsorption and Ion Exchange Processes

    Italian drinking water treatment plants (DWTP) generally use chlorine-based chemicals to achieve the oxidation/disinfection phases of their treatment trains. The main problem related to the application of such disinfectants consists in the formation of disinfection by-products (DBPs) as a result of the reaction with organic substances in the water. Italian regulations set very strict limits for ...


    By IWA Publishing

  • MIEX® DOC Process - A New Ion Exchange Process

    The MIEXÒ DOC Process is a novel process that utilises ion exchange for the removal natural organic matter (NOM) in drinking water treatment. The process was developed by Orica Watercare in partnership with the CSIRO Molecular Sciences and SA Water AWQC. A detailed description of the MIEXÒ DOC Process and trial results from several development stages can be found elsewhere (Nguyen et al., 1994 ...


    By IXOM Watercare

  • Separation of some heavy metal species from electroplating rinsing solutions by ion exchange resin

    A strongly basic anion exchange lewatit MP 600 resin was tested to separate metal species from electroplating rinsing wastewater. An azo resorcinol 4–(2–pyridylazo) dyestuff was used as a complexing agent. Adsorption isotherms were modelled in an ethanol/acetic acid/water media. The loaded resin is regenerated using 4 M HCl whereby the eluted metal species are recovered. Results revealed that ...


    By Inderscience Publishers

  • Radioactive wastewater treatment using a mixture of TANNIX sorbent and VARION mixed bed ion exchange resin

    A wastewater treatment system has been developed by using a mixture of ammonium-insoluble tannin (TANNIX, this is the trademark of an adsorbent made by Mitsubishi Nuclear Fuel Co. Ltd) and mixed (strong acid cation exchanger and strong base anion exchanger) ion exchange resin (MIX) for the selective separation of transuranium isotopes, including Pu, Am, Cm, and U, as well as fission and ...


    By Inderscience Publishers

  • Behaviour of radioactive iodine and bromine from aqueous solutions on the ion-exchange resin Duolite A-113

    The iodide and bromide forms of the ion exchange resin Duolite A-113 were equilibrated separately with respectively labelled iodide and bromide ion solutions of different concentrations, varying from 0.005 M to 0.100 M in the temperature range of 26.0°C to 43.0°C. The distribution coefficient Kd values calculated for iodide and bromide ion exchanges increase with the ionic concentration of the ...


    By Inderscience Publishers

  • A study on the distribution coefficient of iodide ions from aqueous solution on some strongly basic anion exchange resins

    The ion exchange resins Duolite A-116, Indion 830 Type-1 and Indion N-IP Type-2 in iodide form were equilibrated separately with labelled radioactive iodide ion solutions of different concentrations varying from 0.005 M to 0.020 M in the temperature range of 25.0°C to 40.0°C. The Kd values of iodide ions for Duolite A-116 and Indion N-IP Type-2 were higher than that for Indion 830 Type-1 under ...


    By Inderscience Publishers

  • Removal of algogenic organic matter by magnetic ion exchange resin pre-treatment and its effect on fouling in ultrafiltration

    Natural organic matter (NOM) fouling continues to be the major barrier to efficient application of ultrafiltration (UF) in drinking water treatment. Algogenic organic matter (AOM), the main contributor to total NOM levels in raw waters characterised by elevated algae levels, is currently the subject of much investigation. In this study, the effect of AOM on fouling of ultrafiltration and the ...


    By IWA Publishing

  • Combined bio-regeneration and ion-exchange system for perchlorate removal

    In order to prove that perchlorate-laden resins could be bio-regenerated through direct contact with perchlorate-reducing bacteria (PRB), a combined bio-regeneration and ion-exchange (IX) system was operated. Two kinds of perchlorate-laden resins, nitrate-selective A520E and perchlorate-selective A530E, were successfully regenerated by PRB cultivated under anaerobic conditions. The ...


    By IWA Publishing

  • Use of a Magnetic Ion Exchange Resin to Improve DBP Precursor Removal and Reduce Coagulant Usage at Lee County`s OLGA WTP

    The 5 MGD Olga WTP in Lee County, Ft Myers, treats water from the Caloosahatchee River where TOC and color levels range from 15-25mg/L and 80-350 Pt Co Units respectively. This surface water presents many treatment challenges and treatment costs are high with alum doses in excess of 200mg/L required during times of the year to provide an adequate treated water quality. As part of Lee County’s ...


    By IXOM Watercare

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