Bioinspired metal‐organic frameworks in mixed matrix membranes for efficient static/dynamic removal of mercury from water

DOI: 10.1002/adfm.202008499

Authors: Rosaria Bruno (Università della Calabria) , Marta Mon (Universidad de Valencia) , Paula Escamilla (Universidad de Valencia) , Jesus Ferrando‐soria (Universidad de Valencia) , Elisa Esposito (Institute on Membrane Technology, CNR‐ITM) , Alessio Fuoco (Institute on Membrane Technology, CNR‐ITM) , Marcello Monteleone (Institute on Membrane Technology, CNR‐ITM) , Johannes C. Jansen (Institute on Membrane Technology, CNR‐ITM) , Rosangela Elliani (Università della Calabria) , Antonio Tagarelli (Università della Calabria) , Donatella Armentano (Università della Calabria) , Emilio Pardo (Universidad de Valencia)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Advanced Functional Materials , VOL 4

State: Published (Approved)
Published: November 2020
Diamond Proposal Number(s): 22411

Abstract: The mercury removal efficiency of a novel metal-organic framework (MOF) derived from the amino acid S-methyl-L-cysteine is presented and the process is characterized by single-crystal X-ray crystallography. A feasibility study is further presented on the performance of this MOF—and also that of another MOF derived from the amino acid L-methionine—when used as the sorbent in mixed matrix membranes (MMMs). These MOF-based MMMs exhibit high efficiency and selectivity—in both static and dynamic regimes—in the removal of Hg2+ from aqueous environments, due to the high density of thioalkyl groups decorating MOF channels. Both MMMs are capable to reduce different concentration of the pollutant to acceptable limits for drinking water (<2 parts per billion). In addition, a novel device, consisting of the recirculation and adsorption of contaminated solutions through the MOF–MMMs, is designed and successfully explored in the selective capture of Hg2+. Thus, filtration of Hg2+ solutions with multiple passes through the permeation cell shows a gradual decrease of the pollutant concentration. These results suggest that MOF-based MMMs can be implemented in water remediation, helping to reduce either contaminants from accidental unauthorized or deliberate metal industrial dumping and to ensure access for clean and potable freshwater.

Journal Keywords: capture device, mercury(II), metal-organic frameworks, mixed matrix membranes, water remediation

Subject Areas: Chemistry, Materials, Environment


Instruments: I19-Small Molecule Single Crystal Diffraction