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Catalytic metal–organic framework-melamine foam composite as an efficient material for the elimination of organic pollutants

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Abstract

Water-insoluble organic pollutants in environment, such as sea oil spill, industrial reagents, and the abused organic pesticides, bring great risks to global water systems, which thus requires effective approaches for organic pollutant elimination. In this study, we report a catalytic metal–organic framework (MOF)-melamine foam (MF) composite material (DDT-UiO-66-NH2@MF) showing excellent oil–water separation performance and enzyme-like degradation ability toward organophosphorus pesticides. The fabrication of DDT-UiO-66-NH2@MF is based on the immobilization of a MOF-derived nanozyme (UiO-66-NH2) on MF sponge, and followed by the hydrophobic modification of UiO-66-NH2 by 1-dodecanethiol (DDT). The obtained DDT-UiO-66-NH2@MF thus displayed superhydrophobic/superhydrophilic property with a high water contact angle (WCA = 144.6°) and specific adsorption capacity toward various oils/organic solvents (62.2–119.8 g/g), which leads to a continuous oil–water separation on a simple device. In the meanwhile, owing to the enzyme-like property of UiO-66-NH2, DDT-UiO-66-NH2@MF also displayed good ability to hydrolyze paraoxon under mild conditions, which facilitates the elimination of toxic pesticide residuals in water systems. This work provides a simple, efficient, and green approach for the separation and treatment of water-insoluble organic pollutants, as well as expands the use of MOFs-MF sponge composite materials in environmental sustainability.

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All data generated or analyzed during this study are included in this published article and supplementary information.

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Funding

This study was supported by the National Natural Science Foundation of China (22178260, 21621004).

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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Xiaoxiao Yu and Yicui Wei. The first draft of the manuscript was written by Xiaoxiao Yu, revised by Mengfan Wang. Work supervised by Mengfan Wang and Wei Qi. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Mengfan Wang.

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This study does not contain any studies with human or animal subjects performed by any of the authors.

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The authors declare no competing interests.

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Responsible Editor: George Z. Kyzas

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Supplementary Information

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Continuous separation of light oil-water mixture by DDT-UiO-66-NH2@MF sponge (MP4) Supplementary file1 (MP4 9859 KB)

Continuous separation of heavy oil-water mixture by DDT-UiO-66-NH2@MF sponge (MP4) Supplementary file2 (MP4 17052 KB)

Supplementary file3 (DOCX 2879 KB)

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Yu, X., Wei, Y., Qi, W. et al. Catalytic metal–organic framework-melamine foam composite as an efficient material for the elimination of organic pollutants. Environ Sci Pollut Res 30, 44266–44275 (2023). https://doi.org/10.1007/s11356-023-25441-7

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  • DOI: https://doi.org/10.1007/s11356-023-25441-7

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