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A composite nanomaterial comprising of bismuth molybdate and copper-based MOFs (BCuM) was obtained by a facile hydrothermal technique and applied as a nano-adsorbent for the decontamination of wastewater with tetracycline (TC). The nanosorbents' internal elemental constitution, surface morphologic features and internal crystallite structure were analysed using EDS, SEM and XRD techniques. As can be seen from the kinetics of adsorption, the dominating forces of adsorption are chemisorption. At 323 K, the total sorption was in accordance with the Langmuir isotherm reaching 354.610 mg/g. The results of the thermodynamic analysis of the desorption reaction indicate that TC through BCuM occurs spontaneously and is related to an intrinsic heat absorption process. The findings indicated that the BCuM adsorbent showed excellent adsorption over the pH range of 3 ∼ 8 with good reusability. Fourier Transform Infrared (FT-IR) spectroscopy shows that this adsorption is mainly a function of the π-π bonds present in the reaction system of the sorbent and polluting substance. Composite bismuth molybdate nano-adsorbent BCuM of Copper based MOF demonstrated superior adsorption properties and wider application prospects for treating TC from sewage in comparison to single bismuth molybdate nanomaterials.
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