ion exchange acid regenerant Articles

  • ACID SEPARATION FOR IMPURITY CONTROL AND ACID RECYCLE USING SHORT BED ION EXCHANGE

    Acid separation using short bed ion exchange is a now well established technology in copper refinery tankhouses. Refinery bleed streams from liberator cells are treated by short bed systems to produce an acid-free byproduct stream that contains the bleed metals and valuable nickel salts. Removing the acid eliminates the need for a black acid evaporator and reduces the amount of sodium carbonate ...


    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 ...

  • 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.

  • Combination of ion exchange and partial nitritation/Anammox process for ammonium removal from mainstream municipal wastewater

    In this study, a new technology of nitrogen removal from mainstream municipal wastewater is proposed. It is based on ammonium removal by ion exchange and regeneration of ion exchange material with 10–30 g/L NaCl solution with further nitrogen removal from spent regenerant by partial nitritation/Anammox process. Influence of regenerant strength on performance of ion exchange and biological ...


    By IWA Publishing

  • 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

  • Komax teflon lined mixer simplifies acid injection for power plant

    A major source of waste water in many power plants is the waste stream that results from ion exchange used for demineralizing the boiler feed water. The alkaline regeneration waste stream produced by the ion exchange process requires the addition of an acid to this stream before discharge from the plant. Regulatory authorities typically require the effluent to have a near neutral pH before ...


    By Komax Systems, Inc.

  • Removal of ammonia by natural clay minerals using fixed and fluidised bed column reactors

    A series of fixed and fluidised bed ion exchange column runs were conducted to identify the ability of natural clay minerals, sepiolite and clinoptilolite, to remove ammonia from a contaminated drinking water reservoir. Ion exchange column tests using both fixed and fluidised bed were initially carried out with synthetic water composed of NH4Cl. Breakthrough curves as a function of flow rate, ...


    By IWA Publishing

  • Electrodeionization

    Electrodeionization (EDI) is a water treatment technology that has gone from an unproven and unknown commodity to one that has revolutionized the industry in the past 20 years. The technology was first introduced to the market in 1987 by Ionpure Technologies. EDI is used in small and large applications. Laboratories use EDI in systems as low as 360 gallons per day (gpd), while power plants, ...


    By Agape Water Solutions, Inc.

  • Add polish to high purity water

    Electrodeionization (EDI) has recently gained widespread acceptance by water treatment companies and end users alike for almost all applications requiring high-purity water. EDI has proven to be a reliable, cost-effective solution for both end users and water treatment companies. End users purchasing capital equipment can eliminate on-site chemical regeneration. Water treatment companies selling ...


    By Agape Water Solutions, Inc.

  • Nanofiltration As a Post-Treatment at a Conventional Water Treatment Plant

    Introduction The Clifton Water District (Colorado) covers roughly 20 square miles stretching east of Grand Junction to Palisade, and extending south from I-70 to the Colorado River. The District has approximately 7,400 service connections serving a population of 30,000. Utilizing the Colorado River as its primary source, the District's Charles A. Strain Water Treatment Plant has a capacity of 12 ...


  • Biosorptive uptake of cationic dyes from aqueous phase using immobilised dead macro fungal biomass

    Present study deals with possible utilisation of immobilised biomass of a wood rotting dead macro fungus Fomitopsis carnea for the removal of cationic dyes from aqueous solution. The results indicated that biosorbent showed the highest affinity (Langmuir monolayer saturation capacity) for Safranin O (62.9 mg/g), followed by Neutral red (45.5 mg/g), Pyronin Y (30.6 mg/g), Malachite Green (29.9 ...


    By Inderscience Publishers

  • PKU and MSUD screening for phenylketonuria and maple syrup urine disease

    Phenylketonuria (PKU) and Maple syrup urine disease (MSUD), branched-chain ketoaciduria are genetically transmitted metabolic diseases. PKU results in elevated Phenylalanine levels due to deficient activity of the enzyme Phenylalanine hydroxylase. In the MSUD state, elevated levels of leucine (Leu), isoleucine (Ile), valine (Val), and alloiso-leucine can be detected in blood. The increased ...


    By Pickering Laboratories, Inc.

  • Pettit national ice center cuts operating costs, perfects ice quality with Culligan Matrix Solutions

    Challenge Pettit National Ice Center, located in Milwaukee, Wl, is a U.S. Olympic Training Site and the only indoor sea-level ice oval in the U.S. The facility has helped many top speed skaters reach their Olympic medal dreams - while also providing a location for frequent national and international competitions. In fact, all of the U.S. speed skaters who have participated in the last ...


    By Culligan Matrix Solutions

  • Innovative Approaches to RO Concentrate Management: Beneficial Reuse and Concentrate Minimization

    ABSTRACTDesalination of brackish waters and reclaimed waters using reverse osmosis (RO) is often limited by the options available for concentrate disposal, particularly in inland areas. Dewatering the concentrate is alternative approach to disposal but the available thermal and membrane technologies are still cost prohibitive for most applications. Beneficial reuse of the RO concentrate ...

  • Methods of Water Purification

    This article is excerpted from 'Pure Water Handbook' published by Osmonics®, Inc. of Minnetonka, Minnesota USA and is printed with permission of Osmonics, Inc. Water treatment can be defined as any procedure or method used to alter the chemical composition or natural 'behavior' of a water supply. Water supplies are classified as either surface water or groundwater. The majority of public or ...

  • Aerospace - Leading Aerospace manufacturing firm - case study

    Application The company designs and builds flight controls for aircraft and launch vehicles. Their product line includes thrust vector and steering controls for space vehicles as well as thruster valves, regulators and integrated manifolds for satellite propulsion. Manufacturing of most of these products requires either military spec plating or anodizing to ensure protection from extreme ...


  • Metal finishing - Columbia manufacturing company - case study

    Application Columbia Manufacturing Company of Westfield, Massachusetts began producing bicycles in 1877. The company, while still producing bicycles, transitioned its core product line to institutional furniture with chrome plated bases made from tubular steel. Large amounts of potable water were required for the old plating system. The company was using 180,000 gallons of potable water a ...


  • Crossflow Membrane Filtration High-Purity Water Systems

    INTRODUCTION As the electronics industry continues to provide us with such products as high resolution television, notebook size portable computers and cars with automatic navigation systems, it becomes necessary to produce semiconductors with finer device geometries to allow for efficient placement of more circuits per a given area. This requires increased control of a semiconductor's material ...

  • Cost reduction and operating results of RO-EDI

    Electrodeionization (EDI) uses electrical current, in lieu of acid and caustic chemicals, to regenerate cation and anion resin. Reverse osmosis/EDI systems are now widely used to replace conventional mixed-bed ion-exchange (IX) technology in a broad range of applications. Proven effective at high flowrates, EDI has in recent years been incorporated in water treatment plants around the world, ...


    By Agape Water Solutions, Inc.

  • Reverse Osmosis: How Does It Figure Into a Dialysis Water System?

    Better than 95% of all dialysis centers use water purification equipment to purify water for dialysis. The centerpiece of these water purification systems has become reverse osmosis. In conjunction with sound pretreatment, RO has proven itself to be the safest, most reliable, and most economical method of purifying water for dialysis. Water plays an important, life-sustaining role for dialysis ...

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