[Zn (bim)2(bdc)]n –metal-organic framework: application to strontium ions adsorption in batch and fixed-bed column experiments

، صفحه 0-0 (1)
عنوان دوره: اولین دوره بین المللی و بیست و هشتمین دوره ملی (1400)
A metal-organic framework ([Zn (bim)2 (bdc)]n, MOF-ZBB) was prepared and applied as an adsorbent for the removal of strontium ions. The influences of several variables such as pH, contact time, and temperature were studied. The Freundlich, Langmuir, and Dubinin-Radushkevich isotherm models, were used for the analysis of equilibrium data. The maximum adsorption capacity by applying the Langmuir equation was 123.451 mg/g at 75 °C with a pH of 7. The thermodynamic study revealed that the adsorption process is endothermic and spontaneous. The pseudo-second-order kinetic model for adsorption strontium ions onto MOF-ZBB better described the adsorption process. The fixed-bed column experiments were carried out at different feed flow rates to investigate the dynamic capacity of the adsorption process. The results revealed a decrease of about 80% in the efficiency of the column by increasing the flow rate from 1 to 4 ml/min.
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