Background : Zeolitic imidazolate frameworks with three metals of Zn, Co and Ag (ZIF-3M) and ZIF-67 were synthesized at room temperature and characterized with different techniques such as FESEM, BET, EDX and XRD. Then, the synthesized nanoparticles were successfully applied for removal of levofloxacin of aqueous solutions.
Methods: To optimize the significant factors (i.e., pH, adsorbent dose and contact time) the response surface methodology (RSM) was implemented based on Box-Behnken design (BBD).in each step, an appropriate amount of adsorbent was added to 30 ppm of a solution containing levofloxacin and the pH was adjusted to desired value with 0.1 M HCl or 0.1 M NaOH. The mixture was stirred at room temperature and then centrifuged at 7500 rpm for 3 min.
Results: The optimal conditions for each variable were performed using Box-Behnken design. Results revealed ZIF-3M nanoparticles more efficiently remove the levofloxacin than that ZIF-67 in aqueous solution.
Conclusion: In this research, new three metal ZIF (ZIF-3M) nanoparticle was synthesized with Ag, Zn and Co in aqueous solution and characterized with different techniques. Results indicated successful synthesize with preserving ZIF framework. Results specified ZIF-3M has more ability for removal of levofloxacin than that ZIF-67. Isotherm studies were showed that the most suitable model for the adsorption of levofloxacin onto ZIF-3M has a good agreement with the Langmuier model.