Preparation of Nanometer MgO by Ion Exchange Resin Method

2009 ◽  
Vol 79-82 ◽  
pp. 509-512 ◽  
Author(s):  
Min Yang ◽  
Hai Jun Guo ◽  
Yan Sheng Li ◽  
Le Zhou
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Low Cost ◽  
Ion Exchange Resin ◽  
Raw Material ◽  
High Yield ◽  
Preparation Methods ◽  
Strong Base ◽  
Average Size ◽  
Resin Method

In this paper, nanometer MgO powder was prepared by using MgCl2•6H2O as the raw material, and environmental benign strong-base anion exchange resin as the induced-precipitation regent. The influence of the concentration of MgCl2 solution, drying method, calcination temperature and time on particle size and physico-chemical features of MgO was studied. The optimal technical conditions were obtained. The XRD and SEM results show that the nanometer MgO prepared under the optimal technical conditions has regular hexagonal lamellar structure, and is composed of nanocrystals with average size between 10 to 25 nm. The existence of dry N2 prevented the sintering of MgO during decomposition processing of Mg(OH)2. Compared with the other nanometer MgO preparation methods, ion exchange resin method has the advantages of low cost, low pollution, high yield and environmental benign; therefore, it appears to be a promising method for the industrial manufacturing of nanometer MgO.

scholarly journals Ion exchange resin selection for concentration and purification of uranium leached by sulphuric acid solution

2015 ◽  
Vol 5 (2) ◽  
pp. 33-38
Author(s):  
Quang Thai Le ◽  
Minh Tuan Pham ◽  
Nguyen Quynh Trinh ◽  
Khac Tuan Vu ◽  
Hong Ha Nguyen ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Low Cost ◽  
Acid Leaching ◽  
Ion Exchange Resin ◽  
Exchange Capacity ◽  
High Price ◽  
Strong Base ◽  
Total Exchange Capacity ◽  
Total Exchange ◽  
Uranium Solution

Ion exchange is one of the most popular techniques for recovery and purification of uranium from sulfuric acid leaching solution, especially for recovery of uranium from a low uranium containing solutions. Resins commonly used are strong base or weak base anion resins with amine functional group. The anionic form of resins may be NO3-, Cl- , SO­42- or OH-. The selection of  a resin depends on the uranium total exchange capacity, selectivity and the cost. The previous studies often use Amberlite IRA-420 for concentration and purification of uranium solution from Pa Lua sandstone ores. This is a good and suitable resin but high price. To diversify the resins and reduce the costs, instead of IRA-420, the authors tested two commercial resins Indion GS300 (India) and Purolite A400 (UK) in the processing of uranium solution from sandstone ores. The results showed that the uranium total exchange capacity of  these resins is only about 80 - 85% over  Amberlite IRA-420, but these resins should be able to be used instead of Amberlite IRA-420 due to their low cost and availability in Vietnam.

scholarly journals Calcium Removal Technique using Ion-exchange Resin Method

2015 ◽  
Vol 26 (1) ◽  
pp. 53-58
Author(s):  
Noritoshi Tamura ◽  
Koji Nomura ◽  
Yasuyuki Ishida
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Calcium Removal ◽  
Removal Technique ◽  
Resin Method

Immobilization of CdS Nanoparticles on Ion Exchange Resin Microspheres and their High Sensitivity to Pb2+ Ions

2011 ◽  
Vol 236-238 ◽  
pp. 2040-2044
Author(s):  
Han Min Xiao ◽  
Shi Zhao Kang ◽  
Die Er Yin ◽  
Xiang Qing Li ◽  
La Di Jia
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
High Sensitivity ◽  
Ion Exchange Resin ◽  
Intensity Change ◽  
Cds Nanoparticles ◽  
X Ray Diffraction ◽  
Resin Microspheres ◽  
Size Of Particles ◽  
Average Size

CdS nanoparticles were prepared and simultaneously loaded on the ion exchange resin microspheres via a simple in-situ gas-solid reaction. X-ray diffraction (XRD), scanning electron microscope (SEM), EDX analysis and UV-vis spectra were used to characterize the products. The results indicated that the CdS nanoparticles were loaded on the ion exchange resin microspheres, and the average size of particles was approximately 5.3 nm. The nanoparticle coverage was high so that a continuous nanoparticle shell formed on the ion exchange resin microspheres. In addition, the effect of Pb2+ ions (aq.) on the luminescence of the CdS nanoparticles immobilized on the ion exchange resin microspheres were investigated. It was found that the luminescence intensity of the CdS nanoparticles changed significantly when Pb2+ ions were adsorbed on the sample. The lowest concentration of Pb2+ ions that can make the intensity change is 1.0´10-20 mol×dm-3, which implies that the CdS nanoparticles immobilized on the ion exchange resin microspheres are very sensitive to Pb2+ ions (aq.).

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