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Updated: Jan 21, 2026

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
Published on: January 17, 2020
Efficient removal of metal contaminants by EDTA modified MOF from aqueous solutions
Jin Wu1, Jian Zhou1, Shouwei Zhang2
1CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China.
Abstract:
Herein a versatile adsorbent has been synthesized by immobilization of ethylenediaminetetraacetic acid (EDTA) into the pores of the Zr-based metal organic framework (UiO-66) through a facile method. The as-prepared EDTA modified UiO-66 (UiO-66-EDTA) was characterized completely to investigate its physical and chemical properties. It shows great chemical stability with octahedral structure and carboxylic groups and amine groups. Through batch experiments, UiO-66-EDTA shows no specificity for the removal of diverse heavy metal ions (three categories: soft acids, hard acids, and borderline acids) because of its both hard and relatively softer chemical characters of functional groups. The maximum removal capacities of UiO-66-EDTA for Eu3+ (hard acids), Hg2+ (soft acids) and Pb2+ (borderline acids) are 195.2, 371.6 and 357.9 mg g-1, respectively. Notably, 11 metal ions removal efficiency reaches over 99% in co-existing system. The results from X-ray photoelectron spectroscopy (XPS) analysis reveal the coordination of Eu3+, Hg2+ and Pb2+ with carboxyl groups (COOH) and tertiary amine groups (CN(C)C) is responsible for their removal by UiO-66-EDTA. Given the fact that UiO-66-EDTA possesses high chemical stability, facile synthesis method, efficient removal performance and superior reusability, it can be applied in treatment of seriously polluted water with multi-pollutants.
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