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• W4313532456 endingPage "2538" @default.
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• W4313532456 abstract "Abstract The present study is directed to find the optimal conditions required for efficient separation and purification of Ce 3+ as an analog for lanthanides from Fe 3+ , Th 4+ , and Zr 4+ (interfering ions) using Amberlite IR120H (AIR120H) resin as a strongly cationic exchange adsorbent. The main factors affecting the separation processes had been investigated and optimized. Ce 3+ (Ln 3+ ) as an admixture with Fe 3+ , Th 4+ , and Zr 4+ was successfully separated by batch and column techniques. The sorption efficiency ( S , %) from different acidic media was in this order: HCl > HNO 3 > H 2 SO 4 . In a quaternary mixture with Fe 3+ and Th 4+ , the maximum separation factor between Ce 3+ and Zr 4+ was ~ 13 after 90 min of equilibration, and the sorption capacity of AIR120H resin for Ce 3+ was 8.2 mg/g. The rate of adsorption was found to follow a pseudo-second-order kinetic model. Separation of the absorbed ions was achieved by desorption processes. Firstly, 98 ± 2% of loaded Ce 3+ is fully desorbed by 1 M sodium acetate solution without interfering ions. Moreover, ~ 95% of Zr 4+ is desorbed by 1 M citric acid solution. Finally, 85% of loaded Fe 3+ and Th 4+ ions are desorbed with 8 M HCl solution. The batch technique was applied to separate and purify Ln 3+ -concentrate in chloride liquor (LnCl 3 ), coming from the caustic digestion of Egyptian high-grade monazite. However, the enhanced radioactivity in LnCl 3 due to radium -isotopes ( 228 Ra 2+ , 226 Ra 2+ , 224 Ra 2+ , 223 Ra 2+ ) and radio-lead ( 210 Pb 2+ ) is initially reduced by a factor of 92% (i.e., safe limit) by pH-adjustment. As result, it can be recommended that the sorption process by AIR120H resin is efficient and promising for exploring pure lanthanides from its minerals." @default.
• W4313532456 created "2023-01-06" @default.
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• W4313532456 date "2023-01-03" @default.
• W4313532456 modified "2023-09-24" @default.
• W4313532456 title "Selective separation and purification of cerium (III) from concentrate liquor associated with monazite processing by cationic exchange resin as adsorbent" @default.
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• W4313532456 doi "https://doi.org/10.1007/s11696-022-02643-w" @default.
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