Metal‐Organic Frameworks for Dual Photo‐Oxidation and Capture of Arsenic from Water

Despite rapid technological progress, heavy metal water pollution, and particularly arsenic contamination, remains a significant global challenge. In addition, the stabilization of trivalent arsenic as neutral arsenite (AsIII) species hinders its removal by conventional sorbents. While adsorption of...

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Veröffentlicht in:ChemSusChem 2024-12, Vol.17 (24), p.e202400592-n/a
Hauptverfasser: G‐Saiz, Paula, Gonzalez Navarrete, Bárbara, Dutta, Subhajit, Vidal Martín, Elvira, Reizabal, Ander, Oyarzabal, Itziar, Wuttke, Stefan, Lanceros‐Méndez, Senentxu, Rosales, Maibelin, García, Andreina, Fernández de Luis, Roberto
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Sprache:eng
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Zusammenfassung:Despite rapid technological progress, heavy metal water pollution, and particularly arsenic contamination, remains a significant global challenge. In addition, the stabilization of trivalent arsenic as neutral arsenite (AsIII) species hinders its removal by conventional sorbents. While adsorption of anionic arsenate (AsV) species is in principle more feasible, there are only few adsorbents capable of adsorbing both forms of arsenic. In this work, we explore the potential of two well‐known families of Metal‐Organic Frameworks (MOFs), UiO‐66 and MIL‐125, to simultaneously adsorb and photo‐oxidize arsenic species from water. Our results demonstrate that the formation of AsV ions upon light irradiation promotes the subsequent adsorption of AsIII species. Thus, we propose the combined utilization of photocatalysis and adsorption with Metal‐Organic Framework photocatalysts for water remediation purposes. Metal‐Organic Frameworks (MOF) are dual sorbents and photocatalysts able to oxidize trivalent arsenic to pentavalent arsenic species upon illumination, whilst retain both forms via adsorption in their porous structures.
ISSN:1864-5631
1864-564X
1864-564X
DOI:10.1002/cssc.202400592