Application Of Magnetic Metal-Organic Framework Nano Composite ForSolid Phase Extraction Of Methylene Blue From Aqueous Solutions

In this study the adsorption behaviour of Fe3O4coated with TMU-3 MOF (Metal Organic Framework)basedon zinc-benzenedicarboxylateas a synthetic nanoadsorbent (Fe3O4@TMU-3)was investigatedin order to separateMethylene Blue (a cationic dye) from water solutions. Various experiments have been carried out in batch adsorptiontechnique by means of experimental design method to study the effects of the main parameters such as contact time,initial dye concentration, pH, dosage of sorbent and dye solution temperature on the solid phase extraction process. Theresults showed that the adsorption attained to equilibrium in 60 min at room temparatureand the monolayer sorptioncapacity obtained was 49.24mg/g for Fe3O4@TMU-3. The used Fe3O4@TMU-3could be regenerated bywashing with adilute concentration of NaCl solution. The adsorptionof methylene blue was also driven by electrostatic attraction andthe interaction between the Lewisbase –N(CH3)2 in methylene blue and the water molecule coordinated metal sites ofTMU-3. Based on this study, MOFs,can be suggested as potential adsorbents to remove harmful materialsin the liquidphase.