Macro-prep high s strong cation exchange resin
The sulfate effluent solution of 65 mg REEs/L was then subjected to rare earths precipitation study using sodium hydroxide 50% in pH range varied from 3.4 to 9.5 this was followed by washing and drying steps. These treatments were carried out to recovery the uranium content from the sulfate leach liquors of El-Erediya mineralization and the rare earths content was remained dissolved in the desired effluents. The experimental work was performed upon an effluent solutions collected from several hydrometallurgical treatments for El-Erediya mineralization which located in the Eastern desert, Egypt. Rare earths precipitation from sulfate effluent solution To realize the objectives of this work, the various parameters of REE (III) adsorption upon the studied resin have been experimentally optimized as a pre-requisite for the determination of the relevant physical characteristics. This work is concerned with the pre-concentration of the rare earths content from El-Erediya effluent solutions which collected after the uranium recovery processes, extraction of REEs from chloride liquors using cation exchange resin Dowex 50X8 and determining the equilibrium and the kinetic characteristics as well as the interesting thermodynamic data of the strong resin. Zircon, monazite, calcite, apatite, garnet and fluorite are presented as accessory minerals. These minerals are accompanied by pyrite, galena, magnetite–titanomagnetite, ilmenite, hematite, betafite, rutile, muscovite, titanite, fluorite, zircon, monazite, apatite, and tourmaline.
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Pyrochlore group minerals typically contain significant amounts of REE, U and Th.
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Primary and secondary uranium minerals uranium mineral are present in large quantities in the form of pitchblende. This granite exhibits extensive alteration, including silicification, argillization, sericitization, chloritization, carbonatization, and hematization. Įl-Erediya mineralization consists of mineralizations structurally controlled and associated with jasperoid veins that are hosted by a granitic pluton. Commonly used strong cation exchange resins include Dowex AG 50 W-X8, Dowex AG 50WX12, Bio Rad AG 50-X8, Ostion LGKS 0800, sulphonated polystyrene and bonded-phase silica and Amberlite IR-120. The cation exchange resins are the earliest applications for the group separation of rare earth elements. It has to be noted that these elements have now become more important for highly technological applications and most of the industries reportedly use REEs more than platinum group metals and they are notably used more than gold.
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In line with the recent drastic advancement in technology, REEs are becoming increasingly important sources of advanced science materials such as electronic, environmental, optical, magnetic and catalytic technologies. China has become the largest world supplier which reportedly produces more than 95% of total rare earth oxide (REO). Presently, six major countries reportedly produced REEs, namely China, Australia, United States, Russia, Thailand, and Malaysia.
![macro-prep high s strong cation exchange resin macro-prep high s strong cation exchange resin](https://ars.els-cdn.com/content/image/3-s2.0-B0122267702042113-gr2.gif)
Considerable rare earths cake was precipitated from the chloride eluate solutions using oxalic acid.Īn increase in demand for rare earth elements (REEs) has been observed in the recent years because of their unique properties and various applications. A successful preconcentration process for the rare earths content was done with a preconcentration factor of about 42.33. The adsorption process has been found to agree with both the pseudo second order reaction, the Langmuir isotherm and confirms with the concept of the matrix diffusion controls. The physical parameters including the adsorption kinetics, the isotherm models and the thermodynamic data have also been determined. The practical adsorption capacity of rare earths upon the resin under the optimum conditions has been found to attain 80 mg/g which matches with Langmuir theoretical capacity. The adsorption parameters including pH, contact time, temperature, resin to aqueous ratio and rare earths initial concentration in aqueous have been optimized. The equilibrium and kinetic characteristics of rare earths adsorption process using the strong acid macro reticular resin Dowex 50X8 from El-Erediya chloride liqueurs have been determined.