Adsorption of UO22+ on poly(N,N-diethylacrylamide-co-acrylic acid): effects of pH, ionic strength, initial uranyl concentration, and temperature
Adsorption of UO22+ on poly(N,N-diethylacrylamide-co-acrylic acid): effects of pH, ionic strength, initial uranyl concentration, and temperature
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UO22 在聚（N,N-二乙基丙烯酰胺-丙烯酸共聚物）上的吸附：pH、离子强度、初始铀酰浓度和温度的影响
DOI：
10.1007/s10967-013-2434-x
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发表时间：
2013-02
影响因子：
1.6
通讯作者：
Zhang Hongxia
中科院分区：
文献类型：
--
作者：
Liu Tonghuan;Duan Xiaojiang;Duan Guojian;Wu Wangsuo;Yang Ying;Zhang Hongxia
制备了能高效去除UO22+的聚（N，N-二乙基丙烯酰胺-共丙烯酸）（P(DEA-co-AA)）微凝胶。本研究考察了pH值、吸附剂剂量、振荡时间、温度等参数对吸附效果的影响。结果表明，伪二阶模型更适合我们的实验。吸附动力学数据表明，化学吸附是一个快速的过程，30 min内即可达到吸附平衡。Langmuir等温线模型的线性化方程具有很好的相关系数，表明水凝胶对UO22+的吸附等温线可以拟合到Langmuir等温线模型中。吸附过程为自发吸附（∆G0 < 0）和放热吸附（∆H0 < 0）。0.1 M HNO3可有效解吸吸附的UO22+，循环5次后吸附量不显著降低。本研究表明，该P（DEA-co-AA）可作为一种潜在的UO22+吸附剂，也为水溶液中UO22+离子的分离提供了一种简单、快速的分离方法。
We prepared poly(N,N-diethylacrylamide-co-acrylic acid) (P(DEA-co-AA)) microgels which could efficiently remove UO22+ from aqueous solutions. In this study, the effect of adsorption parameters such as pH value, adsorbent dose, shaking time, and temperature has investigated. It is found that the pseudo-second-order model is more suitable for our experiment. The adsorption kinetic data indicated that the chemical adsorption was the swiftness processes, the adsorption equilibrium could be achieved within 30 min. And there are very good correlation coefficients of linearized equations for Langmuir isotherm model, which indicated that the sorption isotherm of the hydrogel for UO22+ can be fitted to the Langmuir isotherm model. The adsorption process was spontaneous (∆G0 < 0) and exothermic (∆H0 < 0). The adsorbed UO22+ can be desorbed effectively by 0.1 M HNO3 and the adsorption capacity is not significantly reduced after five cycles. Present study suggests that this P(DEA-co-AA) can be used as a potential adsorbent for sorption UO22+ and also provide a simple, fast separation method for removal of UO22+ ions from aqueous solution.
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影响因子：
3.2
作者：
M. K. Krušić;S. Velickovic;P. Griffiths;J. Filipović
通讯作者：
M. K. Krušić;S. Velickovic;P. Griffiths;J. Filipović
乙二胺修饰磁性壳聚糖复合物吸附铀酰离子的制备
影响因子：
11.2
作者：
Wang, Jing-song;Peng, Rui-ting;Yang, Jin-hui;Liu, Yao-chi;Hu, Xin-jiang
通讯作者：
Hu, Xin-jiang
影响因子：
15.1
作者：
de Pablo, Liberto;Lourdes Chavez, M.;Abatal, Mohamed
通讯作者：
Abatal, Mohamed
影响因子：
3
作者：
L. Núñez;J. Taboada;F. Fraga;M. Nuñez
通讯作者：
L. Núñez;J. Taboada;F. Fraga;M. Nuñez
影响因子：
13.6
作者：
Guanghui Wang-;Jinsheng Liu;Xuegang Wang;Zhi-Yong Xie;N. Deng
通讯作者：
Guanghui Wang-;Jinsheng Liu;Xuegang Wang;Zhi-Yong Xie;N. Deng