A Cationic Silver -MOF with Colorimetric Feedback for Efficient Removal of Permanganate from Wastewater
- سال انتشار: 1404
- محل انتشار: دهمین کنفرانس زئولیت انجمن شیمی ایران
- کد COI اختصاصی: NZEOLITE10_085
- زبان مقاله: انگلیسی
- تعداد مشاهده: 51
نویسندگان
Department of chemistry, Faculty of science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Department of chemistry, Faculty of science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Department of chemistry, Faculty of science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Department of chemistry, Faculty of science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
چکیده
The extraction of hazardous oxoanions, including the carcinogenic permanganate (MnO₄⁻), from industrial effluents presents a significant challenge due to their persistence in the environment and associated health risks. In this study, we introduce a three-dimensional, water-stable cationic silver-organic framework (Ag-MOF) specifically engineered for the effective sequestration of MnO₄⁻. This framework is composed of Ag(I) nodes and a sulfur-based thioimidazole ligand, showcasing a novel architecture that incorporates charge-balancing tetrafluoroborate (BF₄⁻) anions within its porous channels. These BF₄⁻ ions serve as exchangeable reservoirs, enhancing the framework's ability to rapidly capture MnO₄⁻ through structural and electrostatic compatibility. Importantly, the adsorption process is marked by a noticeable chromogenic transition (from purple to colorless), allowing for immediate visual verification of MnO₄⁻ removal. The Ag-MOF demonstrates outstanding efficacy, achieving over ۹۹% removal of MnO₄⁻ from concentrated solutions (۱۰۰۰ ppm) at equilibrium, without any structural degradation in aqueous environments. This dual capability, high-capacity oxoanion capture combined with self-indicating properties, arises from the meticulous alignment of host-guest interactions and the framework's durable coordination network. By merging anion exchange, stability, and sensory feedback within a single material, this research propels the advancement of multifunctional metal-organic frameworks (MOFs) aimed at tackling priority pollutants as identified by the U.S. EPA. This highlights their promise in the evolution of next-generation water treatment technologies.کلیدواژه ها
MnO ۴- removal, Adsorption, Silver -MOFاطلاعات بیشتر در مورد COI
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