Activated Rice Bran Supported Preyssler Heteropolyacid: A New, Green and Recyclable Biocomposite for Adsorption of Toxic Dyes

A new, green and eco-friendly biocomposite based on Preyssler (H14[NaP5W30O110]) heteropolyacid supported on activated rice bran was prepared by a chemical impregnation method. The biocomposite catalyst was characterized by Fourier transform infrared and scanning electron microscopy. Decolorization of methyl red, methyl orange and methylene blue as carcinogenic and toxic dyes in textile wastewaters have been investigated in order to contribute toward clean technology, which is the most important need of the society. The performance of eco-friendly Preyssler/rice bran biocomposite was compared with rice bran and capability of the rice bran is found to be lower than the Preyssler/rice bran. In all cases, the synthesized biocomposite, was easily recovered and recycled with retention of their initial structure and activity. The results indicated that the decolorization of methyl red, methyl orange and methylene blue follows zero order kinetics.