铀矿冶2024，Vol.43Issue(3)：40-44,5.DOI:10.13426/j.cnki.yky.2024.01.02
水杨酸螯合树脂对铀的吸附性能
Adsorption Performance of Salicylic Acid Chelating Resin for Uranium
王凤菊 1陈树森 1宋艳 1李子明 1吴浩天 1李昊 1李壑1
作者信息
- 1. 核工业北京化工冶金研究院,北京 101149
- 折叠
摘要
Abstract
For the salicylic acid chelating resin,the specific surface area and pore size were determined using low temperature nitrogen adsorption-desorption method;and its thermodynamic stability was examined.The effects of solution pH and ρ(Cl-)on its uranium adsorption performance were stud-ied,and its adsorption isotherms,adsorption kinetics,and desorption performance were also investi-gated.The results show that the specific surface area of salicylic acid chelating resin is 32.34 m2/g,and the pore size is 32.08 nm,The salicylic acid chelated resin has good thermal stability when the temperature is below 180 ℃.When the pH is in the range of 7～9,the resin has good adsorption per-formance,and the uranium adsorption capacity can reach 14.1 mg/g dry resin.The presence of Cl-can reduce the adsorption capacity for uranium.When the ρ(Cl-)is 3.0 g/L,the uranium adsorption capacity decrease by about 9.2％.When the equilibrium ρ(U)in solution is 400 mg/L,the uranium adsorption capacity of the resin reach its maximum,at 153 mg/g dry resin.After 20 h adsorption,the adsorption process reach equilibrium.Both acidic and alkaline desorption agents show good desorption performance for resins,with desorption rates both above 94％.For the real uranium leaching solution with ρ(U)of 21.2 mg/L and ρ(Cl-)of 3.36 g/L,the uranium adsorption capacity of the salicylic acid chelating resin can reach 14.7 mg/g dry resin after 24 h adsorption,indicating good uranium adsorp-tion performance.关键词
水杨酸/螯合/树脂/铀/吸附/浸出液Key words
salicylic acid/chelate/resin/uranium/adsorption/leaching solution分类
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王凤菊,陈树森,宋艳,李子明,吴浩天,李昊,李壑..水杨酸螯合树脂对铀的吸附性能[J].铀矿冶,2024,43(3):40-44,5.
