| UiO-66/UiO-66-PYDC的制备及其对UO22+吸附性研究 |
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| 引用本文： | 许成,张炜,陈元涛,王雲生. UiO-66/UiO-66-PYDC的制备及其对UO22+吸附性研究[J]. 环境科学学报, 2018, 38(11): 4350-4359 |
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| 作者姓名： | 许成 张炜 陈元涛 王雲生 |
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| 作者单位： | 青海师范大学化学化工学院, 西宁 810008,青海师范大学化学化工学院, 西宁 810008,青海师范大学化学化工学院, 西宁 810008,青海师范大学化学化工学院, 西宁 810008 |
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| 基金项目： | 国家自然科学基金（No.21667024）；青海省自然科学基金（No.2016-ZJ-912） |
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| 摘 要： | 通过水热法合成了两种锆基有机骨架材料,采用XRD、SEM、IR、TG、EDS、BET等技术对材料的结构和形貌进行了表征,并通过静态吸附实验在不同条件下测试所制材料对UO2+2的吸附性能,考察了时间、温度、初始铀浓度、pH、CO2-3对吸附的影响.结果表明:Ui O-66体系对铀酰离子的吸附以化学吸附为主,通过表面的羧基官能团与铀酰离子结合从而达到吸附的目的.此外,本实验中材料的比表面积对吸附的影响不明显.在初始最佳pH为10.5的条件下,通过热力学模型拟合发现,低浓度下Ui O-66拥有更大的吸附量.随着溶液中初始铀酰离子浓度的升高,Ui O-66-PYDC展现出更好的吸附效果.
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| 关 键 词： | 金属有机框架材料 吸附 铀酰离子 UiO-66复合材料 |
| 收稿时间： | 2018-04-10 |
| 修稿时间： | 2018-06-11 |
Preparation of UiO-66/UiO-66-PYDC and their absorptive properties on uranyl ions |
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| XU Cheng,ZHANG Wei,CHEN Yuantao and WANG Yunsheng. Preparation of UiO-66/UiO-66-PYDC and their absorptive properties on uranyl ions[J]. Acta Scientiae Circumstantiae, 2018, 38(11): 4350-4359 |
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| Authors: | XU Cheng ZHANG Wei CHEN Yuantao WANG Yunsheng |
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| Affiliation: | School of Chemistry and Chemical Engineering, Qinghai Normal University, Xining 810008,School of Chemistry and Chemical Engineering, Qinghai Normal University, Xining 810008,School of Chemistry and Chemical Engineering, Qinghai Normal University, Xining 810008 and School of Chemistry and Chemical Engineering, Qinghai Normal University, Xining 810008 |
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| Abstract: | Various zirconium-based organic-framework materials were synthesized with hydrothermal method. The structure and morphology of materials were analyzed by using XRD,SEM,IR,TG,EDS and BET. The absorption properties of UO22+ were tested in static absorption experiments. The effects of time, temperature, initial concentration of uranyl ions, pH and CO32- ions on the uranyl ions absorption were studied. The results show that the UiO-66 system absorbs the UO22+ mainly based on chemisorption, through combining uranyl ions and carboxylate group. Besides, the specific surface area of the material has little effect on adsorption. It can be found that UiO-66 has greater absorption capacity at low concentration by the thermodynamic model under the optimum pH of 10.5. With the increase of uranyl ion concentration, UiO-66-PYDC shows the better absorption performance. |
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| Keywords: | metal organic frameworks adsorption uranyl ions UiO-66 composite material |
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