Removal of uranium(VI) from aqueous solution using iminodiacetic acid derivative functionalized SBA-15 as adsorbents.
Removal of uranium(VI) from aqueous solution using iminodiacetic acid derivative functionalized SBA-15 as adsorbents.
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DOI：
10.1039/c3dt52610k
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发表时间：
2014-02
影响因子：
4
通讯作者：
Yulong Wang;L. Song;Lu Zhu;Bo-Long Guo;Suwen Chen;Wang-suo Wu
中科院分区：
文献类型：
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作者：
Yulong Wang;L. Song;Lu Zhu;Bo-Long Guo;Suwen Chen;Wang-suo Wu
以乙二胺三乙酸（ED 3A）、二乙烯三胺四乙酸（DT 4A）和1，2-环己基二次氮基三乙酸（CyD 3A）的三种亚氨基二乙酸衍生物为原料，采用后接枝法制备了三种不同功能的SBA-15，并将其作为吸附剂用于水溶液中铀（Ⅵ）的吸附。通过FT-IR、NMR、TEM、N2吸附/脱附实验和元素分析对材料进行了表征。研究了pH值、离子强度、接触时间、固液比、金属离子初始浓度、温度以及共存离子对功能化SBA-15吸附铀（Ⅵ）的影响。典型的吸附等温线（Langmuir和Freundlich）的吸附过程中，测定，并计算最大吸附容量。讨论了官能团对铀（Ⅵ）吸附的影响。结果表明，SBA-15- 1，2-环己基二次氮基三乙酸（CyD 3A）对铀（Ⅵ）具有较好的选择吸附性能，在铀（Ⅵ）的分离中具有潜在的应用价值。
Three different functional SBA-15 were prepared by a post-grafting method using three iminodiacetic acid derivatives of ethylenediaminetriacetic acid (ED3A), diethylenetriaminetetraacetic acid (DT4A), and 1,2-cyclohexylenedinitrilotriacetic acid (CyD3A), which were used as adsorbents for removal of uranium(vi) from aqueous solution. These materials were characterized by FT-IR, NMR, TEM, nitrogen adsorption/desorption experiments, and elemental analysis. The effect of pH, ionic strength, contact time, solid-liquid ratio, initial metal ion concentration, temperature, and coexisting ions on uranium(vi) sorption behaviors of the functionalized SBA-15 was studied. Typical sorption isotherms (Langmuir and Freundlich) were determined for the sorption process, and the maximum sorption capacity was calculated. The influence of functional groups on uranium(vi) sorption was also discussed. As a result, compared with other current U(vi) sorbents (granite, kaolin, attapulgite), SBA-15-1,2-cyclohexylenedinitrilotriacetic acid (SBA-15-CyD3A) possessed good selective sorption properties, which had potential application in separation of uranium(vi).