AUTHOR=Shen Yanqiong , Yang Qingsong , Gao Yongqiang , Qian Jinjie , Li Qipeng 

TITLE=Robust DUT-67 material for highly efficient removal of the Cr(VI) ion from an aqueous solution

JOURNAL=Frontiers in Chemistry

VOLUME=11

YEAR=2023

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2023.1148073

DOI=10.3389/fchem.2023.1148073

ISSN=2296-2646

ABSTRACT=<p>Robust <bold>DUT-67</bold> was synthesized by the hydrothermal method and characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). To systematically study the removal of Cr(VI) ion by <bold>DUT-67</bold>, single-factor, competition ion, material regeneration, kinetic, and thermodynamic experiments were designed. The experimental results show that <bold>DUT-67</bold> had a maximum removal rate of 96.1% and a maximum adsorption capacity of 105.42 mg g<sup>−1</sup> with material regeneration and outstanding selective adsorption. In addition, the process of removal of the Cr(VI) ion from an aqueous solution by <bold>DUT-67</bold>, which accorded with the pseudo-second-order kinetics model and Langmuir model, was studied, and its adsorption mechanism was reasonably explained by the theoretical calculation.</p>