Performance of composite PES/MOF-5 membranes for the treatment of textile wastewater

The composite polyethersulfone (PES) nanofiltration (NF) membranes were prepared by embedding metal organic framework (MOF-5) for the treatment of textile wastewater. Metal-organic frameworks are intensively explored as filler materials for polymeric membrane, predominantly as a result of their huge porosity, elegant pore size, and high polymer affinity. The hydrophilicity of PES/MOF-5 membranes has been enhanced due to the addition of MOF-5. The contact angle has been decreased from 73.1 to 60.3 degrees and the pure water flux increased from 20.5 to 77.1 L/m(2) h at 0.75 wt. % loading of MOF-5. The incorporated PES/MOF-5 nanofiltration membranes had effective affinity for the removal of 97% and 89% for Methylene Blue (MB) and Indigo Carmine (IC) dyes respectively. In order to study adsorption performance of composite PES/MOF-5 membranes, the experiment of batch adsorption of textile dyes has been studied with the effect of pH. The improvement of membrane performances could be attributed to the well-tailored properties of MOF-5. This result shows that MOF-5 is the potential material for fabricating hybrid NF membranes for textile wastewater treatment.