Work

Thiol-Functionalized Covalent Organic Framework for Efficient Metal Ion Removal in Water Treatment

Year: 2025

Type: article

Abstract: Advanced water treatment technologies must offer selective, efficient, and cost-effective contaminant removal. In this study, TPB-DMTP-COF-SH, prepared from 1,3,5-tris(4-aminophenyl)benzene (TPB) and 2,5-dimethoxyterephaldehyde (DMTP), was synthesized via a two-step method and applied for the adsorption of aluminum (Al3+), iron (Fe2+), and manganese (Mn2+) ions from water. Adsorption performance was influenced by pH, initial concentration, and contact time, with optimal pH values of 3 for Al3+, 8 for Fe2+, and 10 for Mn2+. The adsorption data followed the Langmuir isotherm model, yielding maximum capacities of 3.27 mg g−1 (Al3+), 8.5 mg g−1 (Fe2+), and 0.67 mg g−1 (Mn2+). Kinetic studies indicated a pseudo-second-order mechanism, suggesting chemisorption as the dominant process. Equilibrium adsorption was reached at 15 min for Al3+ and Mn2+ and 20 min for Fe2+. As a proof of concept, we demonstrate that this thiol-functionalized COF not only effectively removes metals but also offers enhanced processability into composite beads and membranes, making it a strong candidate for real-world water treatment applications. These findings highlight TPB-DMTP-COF-SH as a promising and scalable solution for water purification.

Source: Nanomaterials

DOI: 10.3390/nano15080582

Authors: Cristina Arqueros, Lorena Welte, Carmen Montoro, Félix Zamora

Institution: Universidad Autónoma de Madrid

Language: English

Topic: Covalent Organic Framework Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: gold

Estimated APC paid: $2,896