Adsorption Performance for Chromium(VI) of a UiO-66-Ce Metal-Organic Framework Built by DL-Aspartic Acid

Xiaoyi Lin; Sabrina Yanan Jiang; Gang Li

doi:10.3390/ma17215293

Adsorption Performance for Chromium(VI) of a UiO-66-Ce Metal-Organic Framework Built by DL-Aspartic Acid

Materials (Basel). 2024 Oct 30;17(21):5293. doi: 10.3390/ma17215293.

Authors

Xiaoyi Lin¹, Sabrina Yanan Jiang¹, Gang Li²

Affiliations

¹ National Observation and Research Station of Coastal Ecological Environments in Macao, Macao Environmental Research Institute, Macau University of Science and Technology, Macao 999078, China.
² College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.

Abstract

Metal-organic frameworks (MOFs) have recently received a lot of interest for their use in adsorbing and eliminating hexavalent chromium from water. Obtaining low-cost, biocompatible, and environmentally friendly MOFs for research in this field is vital. One very stable three-dimensional UiO-66-Ce(IV) MOF, Ce-asp, was synthesized with a high yield using an amino acid ligand, DL-aspartic acid. As a result, the adsorption characteristics of the MOF against hexavalent chromium ions in aqueous solution were examined. The effects of time, solution pH, MOF dose, and beginning chromium(VI) content in aqueous solution were investigated on adsorption. More crucially, the adsorption mechanism of this MOF for chromium(VI) was proposed, setting the groundwork for its future use in chromium(VI) removal in real-world waters.

Keywords: adsorption; cerium(IV); chromium(IV); metal–organic framework.

Grants and funding

The Science and Technology Development Fund (FDCT), Macao SAR (no. 0046/2024/RIA1) and (no. 001/2022/NIF).