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

Hosni, Mohamed; Abdelaal, Reda; Shahat, Ahmed; El-Sewify, Islam

doi:10.21608/ejchem.2025.380150.11669

	A Novel Functionalized Metal-Organic Framework for Sensitive Detection and Efficient Removal of Manganese Ions from Drinking Water
Egyptian Journal of Chemistry
Articles in Press, Accepted Manuscript, Available Online from 29 June 2025
Document Type: Original Article
DOI: 10.21608/ejchem.2025.380150.11669
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Authors
Mohamed Hosni ¹; Reda Abdelaal ²; Ahmed Shahat ³; Islam El-Sewify ⁴
¹Center for Applied Research on the Environment and Sustainability (CARES), The American University in Cairo
²Department of Chemistry, Faculty of Science, Suez University,43518, Suez, Egypt
³Chemistry Department, Faculty of Science, Suez University, Egypt
⁴Department 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.
Keywords
Metal-organic framework; Manganese detection; Chemical sensor; Water treatment; Schiff base functionalization; Environmental monitoring; Toxic metal remediation


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