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Comparison of ZIF-14 (qtz) and a One-pot Synthesized Superparamagnetic Iron Oxide/ZIF-14 (qtz) Composite for the Adsorption of Diclofenac
Summary
Researchers synthesized a composite of superparamagnetic iron oxide nanoparticles with ZIF-14 metal-organic framework and compared it to ZIF-14 alone for removing pharmaceutical pollutants from water. The magnetic composite was designed to combine adsorption capacity with easy magnetic separation after treatment.
Abstract The global presence of pharmaceutical pollutants in water sources represents a burgeoning public health concern. Recent studies underscore the urgency of addressing this class of emerging contaminants. In this context, our work focuses on synthesizing a composite material, Fe x O y /ZIF-14 ( qtz ), through a streamlined one-pot reaction process, as an adsorbent for diclofenac, an emerging environmental contaminant frequently found in freshwater environments and linked to potential toxicity towards several organisms such as fish and mussels. A thorough characterization was performed to elucidate the structural composition of the composite. The material presents magnetic properties attributed to its superparamagnetic behavior, which facilitates the recovery efficiency of the composite post-diclofenac adsorption. Our study further involves a comparative analysis between the Fe x O y /ZIF-14 ( qtz ) and a non-magnetic counterpart, comprised solely of 2-ethylimidazolate zinc polymer. This comparison aims to discern the relative advantages and disadvantages of incorporating magnetic iron oxide nanoparticles in the contaminant removal process facilitated by a coordination polymer. Our findings reveal that even a minimal incorporation of iron oxide nanoparticles substantially enhanced the composite’s overall performance in pollutant adsorption.
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