Abstract
In this present study, hydrotalcite (HT) implanted Ce-BTC metal organic frameworks (MOFs) abbreviated as HT-CeMOFs were developed for rapid fluoride adsorption. The microscopic properties of the prepared HT-CeMOFs material were studied with different characterization techniques. To identify the fluoride adsorption route, the batch experiments such as pH, dosage, adsorption time, interfering anions, initial ion concentration, selectivity, temperature and pHzpc studies were portrayed towards fluoride removal by HT-CeMOFs. The utmost defluoridation capacity (DC) of HT-CeMOFs is found to be 4662 mg/(F·kg). Fluoride adsorption route onto HT-CeMOFs is followed by Langmuir isotherm and pseudo-second-order with intraparticle diffusion model. Fluoride removal by HT-CeMOFs is spontaneous with endothermic nature. Adsorption mechanism of HT-CeMOFs towards fluoride is followed by electrostatic interaction, ion-exchange and complexation. The regeneration and field exploration of HT-CeMOFs towards fluoride adsorption were performed and their results reveal that the HT-CeMOFs are regenerable and more suitable at field conditions.
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