Resin description of process ion exchangers are synthetic resins organic polymers. Purolite has supplied ion exchange chelating resins to the hydrometallurgy industry for over 30 years. Ion exchange ix is the reversible interchange of ions between a solid and a liquid such as water. Ion exchange can potentially treat poorly clarified liquors or even pulps, thus eliminating. Applications of ion exchange in hydrometallurgy springerlink. Fundamentals of ion exchange ion exchange is the reversible interchange of ions between a solid ion exchange material and a liquid in which there is no permanent change in the structure of the solid.
Rohm and haas ion exchange ion exchange introduction 1 fd sep 2008 ion exchange for dummies an introduction water water is a liquid. Ion exchange is used in water treatment, including water softening, industrial demineralization, condensate polishing, ultrapure water. Uranium is usually present as the monovalent uranyl ionic complex u 3 o 8 at very low levels in groundwater and thus the most cost effective treatment is to remove the uranium with a highly selective ion exchange resin and then dispose of the uranium loaded resin. In model experiments, the influence of degree of crosslinking of dowex 1 on the efficiency of uranium extraction was investigated. Ion exchange is a hydrometallurgical technique that can be effective to recover metals at very low concentrations ppm levels, and where other separation techniques fail, selective separations may be achieved by the correct choice of ion exchange resin. These resins would be stored until such time as licensed operations are resumed at the site, at. Obviously, cation resin is not a viable ion exchange removal method because of the ph requirements and especially when the technique is compared to strong base anion resins. See more ideas about ion exchange, ion exchange resin and water treatment. The chelating resins having aminophosphonic, iminodiacetate, thiol and thiouronium functional groups are used for. Ion exchange resins are used in the extraction of various metals, including rare metals and precious metals,etc. The resin itself is composed of organic polymers that form a.
Ion exchange is used in nearly every part of the nuclear fuel cycle from the purification of uranium from its ore to the final recovery of uranium and transmutation products. Ion exchange chromatography was applied for uranium sorption, using commercially available, strongly basic anion exchanger, dowex 1. Notes of practical application of ion exchange resins in. Adsorption of copper from an ammoniathiosulfate media using dowex 550a ion exchange resin cristian vargas, patricio navarro. Over the last few decades, the ion exchange resins have been used in several different ways in pharmaceutical formulations. A premier supplier of ix resin to the uranium mining industry, our ix resins recover uranium from pregnant leach solutions using either acid leach or alkaline leach processes. Ion exchange resins remove harmful contaminants from liquids, replacing them with beneficial, desired ions. Aside from its use to purify drinking water, the technique is widely applied for purification and separation of a variety of industrially and medicinally. The ion exchange process for recovering uranium from mine water utilizes a quaternary amine incorporated onto a porous styrene divinylbenzene bead. Uranium plants are typically capable of processing 100 m 3 hr of pregnant solution and it is the uranium industry that has been responsible for the many innovations that have occurred in the development of ion exchange technology in recent years. The chelating resins having aminophosphonic, iminodiacetate, thiol and thiouronium functional groups are used for removing specific ions from a mixture of ions. The aqueous phase flows through the stationary resin held in a column, and the net effect of all the chemical reactions is a band of uranium that moves through the ion exchange column. Present and future applications of ion exchange in hydrometallurgy. Contact us for free sample, pricelist and quotation.
Conventional ion exchange resins with different functional groups were evaluated for their potential application in separating uranium uvi and thorium thiv from rare earth elements reiii. Uranium is a natural element found in groundwater throughout the world and regulated in some countries. The degree and type of cross linking varies between different manufacturers. The stream needed to be boiled for 6 h to lower the total carbonate concentration before it could be treated. Ion exchange ix is the preferred method of recovering uranium from pregnant leach solutions and can be used in either acid leach or alkaline leach processes.
Mechanically strong due to high crosslinking but less exchange capacity mechanically less strong due to less crosslinking. The resins studied comprised strong and weakbase anion exchange resins, and strong and weakacid cation exchange resins. Recovering uranium with ion exchange ix resins is the preferred method of recovery today. More precisely, the term encompasses a large variety of processes where ions are exchanged between two electrolytes. Ion exchange is used in water treatment and also provides a method of separation in many nonwater processes. Jul 6, 2017 this board is all about ion exchange resin that is being used for water softeners see more ideas about ion exchange resin, ion exchange and resin. Ion exchange resins in uranium hydrometallurgy pdf download. The effectiveness of ion exchange resins in separating. Common examples are vanadate, molybdate, chloride, and nitrate. Cation resin in the hydrogen form has been found to remove uranium, probably by converting the uranium complex to the uranium cation. An overview conference paper pdf available july 2016 with 2,855 reads how we measure reads. Hydrometallurgy applications ion exchange resin manufacturer. Anion resin in the chloride form can easily reduce uranium levels by over 90%.
Various exchange active groups, at which ions accumulate, are built into the exchangers. Appendix d ion exchange plant design operation and. Our worldclass ix resins serve applications as diverse as industrial water softening, pharmaceutical formulations, sweetener purification, mining and more. In this section, the chemistry involved, the main factors affecting the resins performance, the equipment in which the resins are used, the main problems encountered and how one can evaluate resins in the laboratory are discussed. Uranium carbonate industrial waste streams from a brazilian nuclear production plant were treated by an ion exchange process using a type ii strong base anion exchange resin, ira910a with a dimethyl 2hydroxy ethyl functional group. Ion exchange ix resins are polymers that are capable of exchanging ions with ions in a solution that is passed through them. As one of the leading hydrometallurgy ion exchange resin manufacturers and suppliers in china, we warmly welcome you to wholesale discount hydrometallurgy ion exchange resin made in china here from our factory. Such experience ensures that we understand our clients needs and have allowed us to custom configure our products to target specific elements of interest. High purity ion exchange resin for use in nuclear power plants. Ion exchange resins for uranium removal type 1, macroporous, sba cl1. These loaded resins contain 1% to 3% natural uranium. The focus is on ion exchange rather than on uranium hydrometallurgy and therefore this book is addressed to all. China hydrometallurgy ion exchange resin suppliers.
Not a chemical reactant in and of itself, ix resin is instead a physical medium that facilitates ion exchange reactions. Pdf present and future applications of ion exchange in. The loaded resin is often referred to as a resinate. Ion exchange resins in uranium hydrometallurgy by zaganiaris emmanuel j 2009 paperback orlando popout map handy pocket size pop up. Th and ra are separated by the cation exchange resin in hno3, since th is adsorbed and ra is eluted. Kennecott uranium company kuc wishes to store a small volume approximately 8,000 cubic feet of ion exchange resin loaded with uranium at the sweetwater uranium project beginning in september 2007. All our customized water filtration medias are with high quality and competitive price.
Removal rates are in the 9095% range, but the ph of the effluent will be low about 2. Ion exchange is increasingly used in hydrometallurgical applications for the recovery or purification of metal solutions or for effluent treatment. The uranium adsorption reaction that occurs in the resin can be described by the equation 3. Ion exchange resins are particularly suitable for extracting separated metals from low grade minerals and tailings leaching or slurry, it plays an important role in separating metals with similar properties. Taylor ix plant is designed to treat 10,000 gpm of mine water for removal of uranium. The focus is on ion exchange rather than on uranium hydrometallurgy and therefore this book is addressed to all those involved in the uranium industry for which ion exchange chemistry and technology is not their major field of expertise. All natural waters contain some foreign substances, usually in small amounts. Pdf telecharger ion exchange resins in uranium hydrometallurgy epub ion exchange resins in uranium.
Ion exchange is a reversible chemical reaction where dissolved ions are removed from solution and replaced with other ions of the same or similar electrical charge. The typical properties of resinates are shown in table ii. In the exchange process, the ions of the solution to be treated are exchanged with accumulated ions with the same electrical charge on the resin. Located in ankleshwar, a well developed industrial and economic zone in gujarat it is. A wide variety of process streams benefit from the application of ion exchange resins, as shown in table 1. The amine has the ability to give up anions in exchange for anions in solution, in this case, uranium. Ion exchange usually describes a processes of purification of aqueous solutions using solid polymeric ion exchange resin. Ion exchange investigation for recovery of uranium from. Note that the properties are very similar to those of the original ion exchange resin. Fundamentals of radium and uranium removal from drinking. Such deposits are not removed by common treatment and require special care. Ion exchange also plays a valuable role in the management of nuclear wastes generated in the fuel cycle. Uranium remediation by ion exchange and sorption methods. Ion exchange offers various grades of chelating resins, strong and weak acid cation exchange resins for removing or recovering metal ions.
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