A Crosslinked Ionic Organic Framework for Efficient Iodine and Iodide Remediation in Water. (24th November 2022)

• Record Type: Journal Article
• Authors: Zhang, Mingshi; Samanta, Jayanta; Atterberry, Benjamin A.; Staples, Richard; Rossini, Aaron J.; Ke, Chenfeng
• Is Part Of: Angewandte Chemie. Volume 134:Number 52(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-24
• Subjects: Hydrogen-Bonded Crosslinked Organic Framework -- Iodide Removal -- Iodine Adsorption -- Ionic Porous Organic Framework -- Nitrate Dimer; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202214189
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Iodine is widely used as an antimicrobial reagent for water disinfection in the wilderness and outer space, but residual iodine and iodide need to be removed for health reasons. Currently, it is challenging to remove low concentrations of iodine and iodide in water (≈5 ppm). Furthermore, the remediation of iodine and iodide across a broad temperature range (up to 90 °C) has not previously been investigated. In this work, we report a nitrate dimer‐directed synthesis of a single‐crystalline ionic hydrogen‐bonded crosslinked organic framework (HC OF‐7). HC OF‐7 removes iodine and iodide species in water efficiently through halogen bonding and anion exchange, reducing the total iodine concentration to 0.22 ppm at room temperature. Packed HC OF‐7 columns were employed for iodine/iodide breakthrough experiments between 23 and 90 °C, and large breakthrough volumes were recorded (≥18.3 L g −1 ). The high iodine/iodide removal benchmarks recorded under practical conditions make HC OF‐7 a promising adsorbent for water treatment. Abstract : An ionic porous organic framework (HC OF‐7) has been developed to remove iodine residues (I2 and I − ) after water disinfection, demonstrating high breakthrough volumes and wide working temperatures.