Hou Yun-Long, Diao Yingxue, Jia Qiangqiang, Chen Lizhuang
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China.
ACS Omega. 2020 Mar 24;5(13):7392-7398. doi: 10.1021/acsomega.9b04419. eCollection 2020 Apr 7.
A stable porous sorbent was achieved through the specific transformation of flexible thioalkyl groups and metal cluster sites in a zirconium MOF (metal-organic framework; Zr-) template. The target polymer combines sulfoxide/sulfone and phosphoric acid in a single framework, which was fully characterized by H-NMR, PXRD, IR, and elemental analysis. When employed as the heavy metal adsorbent, exhibit a remarkable Eu(III) sorption behavior, achieving both high chemical affinity ( = 10) and sorption capacity (the maximum Eu(III) sorption capacity reached 220 mg g at pH = 4.0 and = 298 K calculated from the Langmuir model). Recyclability and selectivity test of further prove that the sorbent is highly stable and effective for europium enrichment in the aqueous solution. This work takes focus on the introduction of multifunctional groups into a single polymeric framework in a feasible and environmentally friendly way and highlights the sorption efficiency for europium removal from the aqueous solution.
通过在锆基金属有机框架（Zr -）模板中对柔性硫代烷基和金属簇位点进行特定转化，获得了一种稳定的多孔吸附剂。目标聚合物在单一框架中结合了亚砜/砜和磷酸，通过氢核磁共振（H-NMR）、粉末X射线衍射（PXRD）、红外光谱（IR）和元素分析对其进行了全面表征。当用作重金属吸附剂时，表现出显著的铕（III）吸附行为，实现了高化学亲和力（K = 10）和吸附容量（根据朗缪尔模型计算，在pH = 4.0和T = 298 K时，最大铕（III）吸附容量达到220 mg g⁻¹）。对该吸附剂的可回收性和选择性测试进一步证明，该吸附剂对于水溶液中铕的富集具有高度稳定性和有效性。这项工作着重于以可行且环保的方式将多功能基团引入单一聚合物框架，并突出了从水溶液中去除铕的吸附效率。
