Durable and recyclable MOF@polycaprolactone mixed-matrix membranes with hierarchical porosity for wastewater treatment

With the fast-growing global water crisis, the development of novel technologies for water remediation and reuse is crucial. Industrial wastewater especially contains various toxic pollutants that pose an additional threat to the environment; thus, efficient removal of such contaminants can ensure s...

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Bibliographic Details
Published in:Nanoscale 2023-12, Vol.15 (48), p.19617-19628
Main Authors: Hani, Amal, Haikal, Rana R, El-Mehalmey, Worood A, Safwat, Youssef, Alkordi, Mohamed H
Format: Article
Language:English
Subjects:
Adsorption
Contaminants
Diffusion rate
Dyes
Endothermic reactions
Fresh water
Industrial wastes
Membranes
Metal-organic frameworks
Methylene blue
Polycaprolactone
Recyclability
Reprocessing
Solvents
Sorbents
Wastewater treatment
Water reuse
Water treatment
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Summary:With the fast-growing global water crisis, the development of novel technologies for water remediation and reuse is crucial. Industrial wastewater especially contains various toxic pollutants that pose an additional threat to the environment; thus, efficient removal of such contaminants can ensure safe reprocessing of industrial wastewater, thereby alleviating the demand for fresh water. Herein, we describe a novel and efficient approach for preparing porous polycaprolactone (PCL) membranes with a hierarchical architecture via a simple solvent/non-solvent methodology. A mixed-matrix membrane (MMM) was further constructed utilizing an amine-functionalized metal-organic framework as the sorbent filler nanoparticles and PCL as the polymer support matrix (MOF@PCL) for wastewater treatment applications. The MOF@PCL MMM demonstrated homogeneous morphology as well as exceptional performance towards the removal of both cationic (methylene blue, MB) and anionic (methyl orange, MO) organic dyes, where the maximum adsorption capacities reached 309 mg g −1 and 208 mg g −1 , respectively. Kinetic and thermodynamic investigations revealed that the adsorption process was endothermic with a fast intraparticle diffusion rate constant. The MOF@PCL MMM also displayed excellent mechanical stability and recyclability, where the removal efficiency was maintained after 10 cycles. A mixed-matrix membrane (MMM) was further constructed utilizing an amine-functionalized metal-organic framework as the sorbent filler nanoparticles and PCL as the polymer support matrix (MOF@PCL) for wastewater treatment applications.
ISSN:2040-3364
2040-3372
DOI:10.1039/d3nr04044e