Zhang Mingshi, Samanta Jayanta, Atterberry Benjamin A, Staples Richard, Rossini Aaron J, Ke Chenfeng
Department of Chemistry, Dartmouth College, 41 College Street, Hanover, NH 03755, USA.
United States Department of Energy, Ames National Laboratory, Ames, IA 50011, USA.
Angew Chem Int Ed Engl. 2022 Dec 23;61(52):e202214189. doi: 10.1002/anie.202214189. Epub 2022 Nov 24.
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 (H OF-7). H 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 H 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 ). The high iodine/iodide removal benchmarks recorded under practical conditions make H OF-7 a promising adsorbent for water treatment.
碘作为一种抗菌试剂，在野外和外层空间的水消毒中被广泛使用，但出于健康原因，需要去除残留的碘和碘化物。目前，去除水中低浓度的碘和碘化物（约5 ppm）具有挑战性。此外，此前尚未研究过在很宽的温度范围（高达90°C）内对碘和碘化物的修复。在这项工作中，我们报告了一种由硝酸盐二聚体导向合成的单晶离子氢键交联有机框架（HOF-7）。HOF-7通过卤素键合和阴离子交换有效地去除水中的碘和碘化物物种，在室温下将总碘浓度降低到0.22 ppm。使用填充有HOF-7的柱子在23至90°C之间进行碘/碘化物穿透实验，并记录到了较大的穿透体积（≥18.3 L g）。在实际条件下记录的高碘/碘化物去除基准使HOF-7成为一种有前景的水处理吸附剂。
