新型氮杂冠醚吸附剂对低浓度La^(3+)的富集性能研究  

Study on the Enrichment Performance of New Aza Crown Ether Adsorbent for Low Concentration lanthanum(Ⅲ)

作　　者：吴江华 肖松文[2] 杨天足[1] 张杜超 万洪强 夏大厦[3] WU Jiang-hua;XIAO Song-wen;YANG Tian-zu;ZHANG Du-chao;WAN Hong-qiang;XIA Da-sha(School of Metallurgy and Enironment,Central South University,Changsha 410083,China;Changsha Research Insitution of Mining and Metallurgy Co.,Lad.,Changsha,410012,China;Hangzhou Yanqu Information Technology Co.,Lad.,Hangzhou 310012,China)

机构地区：[1]中南大学冶金与环境学院,湖南长沙410083 [2]长沙矿冶研究院有限责任公司,湖南长沙410012 [3]杭州研趣信息技术有限公司,浙江杭州310012

出　　处：《湖南有色金属》2021年第1期45-49,共5页Hunan Nonferrous Metals

基　　金：国家自然科学基金(51704039);湖南省自然科学基金(2017JJ3320)。

摘　　要：基于分子识别分离技术,将氮杂冠醚固化到硅胶树脂上制备成新型吸附剂,用于从硫酸体系中吸附分离La^(3+)。结果表明,氮杂冠醚吸附剂对硫酸体系中稀土La^(3+)表现出较强的吸附分离能力。最佳吸附条件为温度298 K、时间15 min,且液相中平衡阴离子浓度和溶液pH对吸附过程影响不大。吸附反应为吸热过程,以化学吸附为主,最大饱和吸附容量22^23 mg/g。吸附反应的机理在于冠醚环上N、O原子与La^(3+)之间的配位反应。In this paper,based on molecular recognition technology,a novel adsorption was preparaed by impregnating aza crown ether into the silica gel resin,and then it’s used to extract La3+from the sulfuric acid system.The results show that the aza crown ether adsorbent has a strong separation ability for La3+.The best adsorption conditions are temperature of 298 K,contact time of 15 min,while the equilibrium anion concentration and solution pH have little effect on the adsorption process.The adsorption reaction is an endothermic process,which is dominated by chemical adsorption,and the maximum saturated adsorption capacity is 22~23 mg/g.The mechanism of the adsorption reaction lies in the coordination reaction between the N and O atoms on the crown ether ring and La3+.

关 键 词：分子识别分离技术 氮杂冠醚 镧 硫酸体系 

分 类 号：TF845[冶金工程—有色金属冶金]