Decolorization of Methylene Blue from an Aqueous Solution Using MIL-۵۳(Al)-(NH۲) @PANI Absorbent

The aim of this study was to prepare a modified type of MOF to remove pollution from wastewater. In the present work, a new composite was prepared using metal-organic framework MIL-۵۳(Al)-(NH۲) and polyaniline (PANI). Accordingly, MIL-۵۳(Al)-(NH۲) was first prepared using a fast water-based method. Then, using the synthesized MOF, MIL-۵۳(Al)-(NH۲) @PANI composite was prepared. The characterization of these synthesized materials was done by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Then, a methylene blue solution was chosen as a sample solution containing dye that commonly exists as a pollutant in industrial and urban wastewater and its removal was investigated with the help of MIL-۵۳(Al)-(NH۲) @PANI. The effect of different parameters from the amount of absorbent, color concentration, optimal removal time, and acidity of the environment were investigated with the help of fractional factorial experimental design method . Afterwards, under the optimal conditions obtained, the efficiency of MIL-۵۳(Al)-(NH۲) @PANI for removal of methylene blue from a real wastewater sample was investigated by spike method. The results showed that the adsorbent value of ۰.۰۸ g/L was chosen as the optimal value. According to the results of the tests, the concentration of ۵۰ ppm methylene blue was chosen as the optimal concentration. PH= ۵ and time of ۳۰ minutes showed the best performance of the adsorbent material. The adsorbent showed relatively good reproducibility.

کلیدواژه ها:

MIL-۵۳(Al)-(NH۲) ، Metal-organic framework ، Methylene Blue Removal ، Wastewater Treatment ، Experimental Design ، Fractional Factorial Design