ArticleACS omega2025
Detection and Selective Sorption of Copper Ions by a COF-Modified Melamine Sponge.
Article in ACS omega, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
9 authors.
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Abstract
Commercial melamine sponges were modified with a functional covalent organic framework (COF), and they were evaluated as adsorbents of divalent copper cations from aqueous solutions. A phosphazene unit successfully covered the surface of the melamine sponge, and the organic framework was subsequently formed through the nucleophilic substitution with 4,4' bipyridine. The covalent organic framework functionalized on the melamine sponge can detect and effectively adsorb copper compounds in aqueous solutions. Its selectivity toward the adsorption of copper was demonstrated through the presence of different metal salts. Four competitive metal cations, i.e., copper, nickel, iron, and calcium, were selected to confirm the preferential binding of copper on the COF-functionalized sponge. The outcome was determined through the studies of X-Ray Fluorescence elemental analysis, X-Ray Photoelectron Spectroscopy (XPS), and Electron Paramagnetic Resonance experiments. XRF reported a copper sorption capacity of 293 μg cm
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