ion exchange Articles

  • 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 ...


  • 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

  • Nitrate Removal by Countercurrent Ion Exchange

    Nitrate removal technology by continuous countercurrent ion exchange from potable water. High flow capacity, low waste generation. This ICHEM award winning technology is the industry standard used in the United Kingdom. More than 20 installations installed. PuriTech's patented multi-port valve is at the center of each production skid. At average, each unit produces a maximum waste ...


    By PuriTech Ltd

  • Magnetic Ion Exchange Solves Problems

    In 2004, Big Elk Water Association, near Estes Park, Colo., earned the unenviable Environmental Working Group label of Colorado water system with the worst quality water. Despite multiprocess treatment, BEWA’s finished water had some of the highest concentrations of total trihalomethanes (TTHMs) and haloacetic acids (HAA5) in the state. BEWA delivers water to about ...


    By IXOM Watercare

  • 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

  • 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

  • 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.

  • 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

  • Electrolytic denitrification with an ion-exchange membrane in groundwater

    Nitrate contamination of groundwater is an important issue in rural areas. In this study, an electrolytic method for the denitrification of groundwater was investigated in a laboratory reactor. We used an ion-exchange membrane, employing a titanium oxide anode and five kinds of cathode for the investigation. The nitrate removal efficiencies with Cu, Pb, Ti/Ir/Ru, Ti/Ir/Ta, and Zn cathodes were ...


    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

  • 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

  • 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

  • Improving the biological stability of drinking water by ion exchange

    To guarantee a good water quality at the consumer’s tap, natural organic matter (NOM) should be (partly) removed during drinking water treatment. The objective of this research is to measure the effect of NOM removal by ion exchange on the biological stability of drinking water. Experiments were performed in two lanes of the pilot plant of Weesperkarspel in the Netherlands. The lanes consisted of ...


    By IWA Publishing

  • Novel ion-exchange system softens produced water for steam generation

    As California entered a period of severe drought in 2008, the challenges of using thermal methods to extract heavy oil became compounded by the difficulty of securing freshwater sources from which to generate the high-quality steam that these methods require. In an effort to manage the crisis, then-Gov. Arnold Schwarzenegger proclaimed a state of emergency and enacted widespread ...


    By Eco-Tec Inc.

  • 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 ...

  • Nickel salt recovery using Recoflo short bed ion exchange

    Since its commercialization over thirty years ago, the Recoflo® short bed ion exchange process has been extensively utilized for recovery of a wide variety of acids and metal salts. The process has a number of unique features such as utilization of fine mesh resins in a compressed bed, typically 12 – 24 inches in height, which together make it ideal for these types of applications. With ...


    By Eco-Tec Inc.

  • Adsorption of four perfluorinated acids on non ion exchange polymer sorbents

    Perfluorinated compounds (PFCs) have attracted global concern due to their ubiquitous distribution and properties of persistence, bio accumulation and toxicity. The process of adsorption has been identified as an effective technique to remove PFCs in water. Different non ion-exchange polymeric adsorbents were tested with regard to their sorption kinetics and isotherms at low PFCs concentrations. ...


    By IWA Publishing

  • Produced water recovery at Seneca Resources using short bed ion exchange

    As a result of water restrictions in the Bakersfield, California area Seneca Resources has installed a new produced water recovery system. The paper reviews this process, which consists of water knock out and clarification tanks, an IGF unit, a specialized nutshell filter, and a short bed ion exchange softener that is regenerated with salt. The water being treated has a TDS level of 4,000 - ...


    By Eco-Tec Inc.

  • Temperature effect on ion exchange equilibrium between CMX membrane and electrolytes solutions

    Ion exchange equilibrium for three systems involving monovalent and divalent ions has been investigated over various temperatures (283, 298 and 313 K) using CMX cationic exchange membrane. All experiments were carried out at 0.1 mol/L. Ion exchange isotherms for the binary systems (Na+/K+), (Na+/Ca2+) and (K+/Ca2+) were established at ...


    By IWA Publishing

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