Removal of methyelene blue dye from irrigation waste water by photo catalytic degradation using zinc doped magnesium ferrite nanoparticles Kaur Gagandeep1, Kaur Manpreet1*, Kaur Navneet1, Jeet Kiran2 1Department of Chemistry, Punjab Agricultural University, Ludhiana-141004, Punjab 2Electron Microscopy and Nanoscience Laboratory, Punjab Agricultural University, Ludhiana-141004, Punjab *Corresponding author: manpreetchem@pau.edu
Online published on 13 November, 2020. Abstract Dyes from industries contaminate the water used for irrigation purposes thus posing threat to flora and fauna. Synergistic adsorption and photo catalytic degradation are important areas of research for the removal of organic contaminants from water. In the present work, effect of using different fuels on the adsorption and photo degradation potential of Mg0.6Fe2 nanoparticles (NPs) was Zn0.4O4 studied. Polyethylene glycol (PEG), urea and oxalyl dihydrazide (ODH) were used as fuels and metal nitrates as oxidizers for the synthesis of NPs. The synthesized nanoparticles (NPs) were characterized by employing X-ray diffraction, Transmission Electron Microscopy, Scanning Electron Microscopy equipped with Energy dispersive X-ray spectroscopy, Vibrating Sample Magnetometery and Fourier Transform Infrared spectroscopy. Methylene blue (MB) was used as a model compound for the study. Adsorption experiments were carried out by batch method. Adsorbent dose, pH, contact time and temperature was studied. The maximum adsorption of MB was observed at pH 10. Positive ΔH° values indicated endothermic nature of adsorption. Langmuir and Freundlich isotherms showed better fit than Dubinin-Radushkevitch isotherm. Maximum adsorption capacity (qmax) was higher for NPs synthesized by urea (80.6 mg g−1) as fuel followed by PEG (17.0 mg g−1) and ODH (14.7 mg g−1) as fuel. The advantage of using Mg0.6Zn0.4 Fe2O4 NPs over activated charcoal is their role as magnetically separable photocatalyst for removing organic contaminants from water. Top Keywords Adsorption, Fuel, Methylene blue, Mg-Zn-ferrite nanoparticles, Photocatalysis. Top |