A Novel Functionalized Metal-Organic Framework for Sensitive Detection and Efficient Removal of Manganese Ions from Drinking Water

Document Type : Original Article

Authors

1 Center for Applied Research on the Environment and Sustainability (CARES), The American University in Cairo

2 Department of Chemistry, Faculty of Science, Suez University,43518, Suez, Egypt

3 Chemistry Department, Faculty of Science, Suez University, Egypt

4 Department of Chemistry, Faculty of Science, Ain Shams University, 11566 Cairo, Abbassia, Egypt

Abstract

Manganese nano sensor (MNS) derived from Al-NH2-MIL-53 (ANM-53) via Schiff base condensation with 1-hydroxy-2-naphthaldehyde exhibits exceptional sensing capabilities for Mn2+ ions in aqueous media. This study presents a comprehensive investigation into the synthesis, characterization, and application of MNS as both a chemical sensor and adsorbent for manganese ions, which are environmentally concerning contaminants in drinking water systems. The functionalized MOF demonstrates remarkable sensitivity with a detection limit of 0.61 ppb, outperforming many conventional sensing methodologies. The sensing mechanism is mediated by coordination interactions between the Schiff base moieties and Mn2+ ions, resulting in measurable spectroscopic shifts. FTIR, SEM, TEM, XRD, and BET analyses confirm the successful functionalization while maintaining the structural integrity and porosity of the parent framework. The MNS material simultaneously functions as an effective adsorbent, removing up to 92% of Mn2+ ions from aqueous solutions within 2 minutes under optimized conditions. This dual-functional nanomaterial presents a promising platform for both monitoring and remediating manganese contamination in water resources, addressing a critical environmental and public health concern with potential applications in portable water quality monitoring devices.

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Egyptian Journal of Chemistry
Volume 68, Issue 13 - Serial Number 13
(In Loving Memory of Late Professor Doctor”Zeinab M. Nofal” In progress
December 2025
Pages 15-28

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History

  • Receive Date: 29 April 2025
  • Revise Date: 03 June 2025
  • Accept Date: 28 June 2025

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