文献类型：期刊文献

英文题名：Aluminum-based metal-organic frameworks (CAU-1) highly efficient UO22+ and TcO4 ions immobilization from aqueous solution

作者：Zhong, Xin[1];Liang, Wen[1];Wang, Huifang[1];Xue, Chao[2];Hu, Baowei[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China;[2]Fujian Normal Univ, Sch Environm Sci & Engn, Fuzhou 350007, Fujian, Peoples R China

年份：2021

卷号：407

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000613431800003)、、WOS

基金：Financial support from the Research Fund Program of National Natural Science Foundation of China (No. 21876115, 52004067), the Key Research Program of Shaoxing University (2019LG1003).

语种：英文

外文关键词：MOF; CAU-1; TcO4-; ReO4-; UO22+; Adsorption

外文摘要：In this research, an Al-based metal-organic framework (MOFs), CAU-1 was prepared through complexation between 2-aminoterephthalic acid and Al (III) by solvothermal approach, and simple operation and cost-effective synthetic route. The objective was to immobilize the typical positive/negative radionuclide ions (UO22+/TcO4-) in aqueous solution. The synthesized CAU-1 was characterized by XRD, FT-IR, TGA, FESEM, TEM-SAED, pHpzc, XPS and N-2 physisorption analysis. The structure of CAU-1 possessed excellent thermostability, rich functional groups (-NH2 and-OH groups), as well as large surface area (1636.3 m(2)/g) and the micropore volume (0.51 m(3)/g). Furthermore, batch experiments demonstrated that CAU-1 with superior adsorption capacity was 648.37 (UO22+) mg/g and 692.33 (ReO4-) mg/g calculating from Langmuir isotherm model, respectively. Thermodynamic investigation showed the adsorption process was endothermic and spontaneous. In addition, the adsorption mechanism of ReO4- ion onto CAU-1 could be electrostatic attraction and chelation effect, while for UO22+ ion, was mainly chelation effect induced by nitrogen-containing and oxygen-containing functional groups. Hence, the inexpensive and high-capacity CAU-1 could be considered as a practical material for sequestrations of radioactive pollutants from water environment.