文献类型：期刊文献

英文题名：The water-based synthesis of chemically stable Zr-based MOFs using pyridine-containing ligands and their exceptionally high adsorption capacity for iodine

作者：Wang, Zhe[1];Huang, Ying[1];Yang, Jian[1];Li, Yongsheng[1];Zhuang, Qixin[1];Gu, Jinlou[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2017

卷号：46

期号：23

起止页码：7412

外文期刊名：DALTON TRANSACTIONS

收录：;EI(收录号：20172803903253);WOS:【SCI-EXPANDED(收录号:WOS:000403436200007)】；

基金：This work was financially supported by the Natural Science Foundation of China (51072053, 51372084), the Innovation Program of Shanghai Municipal Education Commission (13zz040), the Nano-Special Foundation for Shanghai Committee of Science and Technology (12nm0502600) and the 111 Project (B14018).

语种：英文

外文关键词：Adsorption - Reusability - Adsorbents - Chelation - Iodine - Synthesis (chemical) - Ligands

摘要：The primary pollutant, radioactive iodine (I-2), has become a worldwide concern due to its serious ill effects of radiotoxicity on human health. Therefore, it is of great significance to develop novel adsorbents for effectively eliminating I-2 from nuclear waste. Herein, we reported a Zr-based MOF adsorbent constructed by utilizing pyridine-containing pyridine-dicarboxylic acid (PYDC) as organic ligands (UiO-66-PYDC) as well as active sites for the efficient removal of I-2. UiO-66-PYDC MOFs were synthesized by a hydrothermal strategy and featured good chemical and thermal stabilities, endowing them with the ability to work in harsh environments. The abundant and inherent pyridine moieties in the developed adsorbent worked as active adsorption sites to capture I-2. The correlation between the most significant parameters such as the contact time, adsorbate concentration, and reusability was optimized, and the interaction mechanism between I-2 and UiO-66-PYDC was investigated in detail. As for the current adsorbent, a pseudo-second order rate equation was used to explain the removal kinetics, and the Langmuir model exhibited a better fit to the adsorption isotherm than the Freundlich model. Thanks to the strong affinity of PYDC ligands to I-2 and high porosity, the adsorption capacities of UiO-66-PYDC for I-2 could reach as high as 1250 mg g(-1), which was much higher than those of many other reported MOFs. Additionally, the UiO-66-PYDC MOFs exhibited excellent renewable adsorption properties, prefiguring their great promise as green adsorbents for I-2 removal in nuclear waste management.