Preparation of amino modified styrene-divinylbenzene resin and its adsorption of rhenium

被引：0
|
作者：
Zhang Y. [1 ]
Hua R. [1 ]
Kou X. [2 ]
Liu F. [1 ]
Kong J. [1 ]
Zhang F. [1 ]
He F. [1 ]
Feng Y. [1 ]
机构：
[1] State Key Laboratory of Nuclear Resources and Environment, School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, Jiangxi
[2] Sunresin New Materials Co., Ltd, Xi'an, 710076, Shaanxi
来源：
Hua, Rong (huarong80@126.com) | 1600年 / Materials China卷 / 71期
关键词：
Adsorption; Desorption; Kinetics; LSC-Re resin; Rhenium; Separation and enrichment;
D O I：
10.11949/0438-1157.20191459
中图分类号：
学科分类号：
摘要：
The ion exchange method is widely used in the hydrometallurgical industry because it is suitable for the separation and enrichment of low-concentration substances. The synthesis and application of new high-efficiency adsorption materials have become the development trend in this field. In view of the current situation that the associated scarce rhenium minerals in uranium mine need to recover synchronously, the preparation of amino modified styrene-divinylbenzene resin (LSC-Re) was used to recover rhenium in this work. The effect of aqueous acidity, initial concentration, adsorption time and adsorption temperature on the adsorption performance were systematically investigated by static and dynamic adsorption desorption experiments. The results show that 6 h is sufficient up to equilibrium for the LSC-Re anion exchange resin at room temperature, and the acidity has little effect on the adsorption. The LSC-Re anion exchange resin exhibited higher affinity toward Re (Ⅳ) than U(Ⅵ) at pH 1.5, the maximum value of separation factor βRe(Ⅳ)/U(Ⅵ) is 41.68. The saturated adsorption capacity of resins could reach 129.3 mg•g-1 at present conditions. The adsorption mechanism is in accordance with Langmuir adsorption isotherm model and quasi-second-order kinetic model, and the adsorption process is a spontaneous endothermic from the perspective of thermodynamics and kinetics. The dynamic saturated adsorption capacity could reach 76.17 g•L-1 and the saturation ratio could reach 2.35 by controlling the solution flow rate to 0.5 ml•min-1 in the dynamic adsorption experiment. The 8 resin bed volumes can be desorbed completely by 1 mol•L-1 NH3•H2O, the enrichment factor is close to 70 times, which means that the LSC-Re anion exchange resin has good industrial application prospects in recovery Re (Ⅳ). © All Right Reserved.
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页码：2109 / 2117
页数：8
相关论文
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