Manpreet KaurKakanpreet Kaur2017-06-172017-06-172016http://krishikosh.egranth.ac.in/handle/1/5810021117Role on nanomaterials for remediation of contamintioned water is an important area of research. In the present study ferric oxide nanoparticles (NPs) were synthesized by combustion method. oxalyl dehydrazide (ODH), polyethylene glycol (PEG) and urea were used as fuel. Metal nitrates were used as oxidizer. Oxidizer:fuel ratio was maintained unity. The mixture was sintered at 4000 C. Synthesized ferric oxide NPs were characterized by employing various physicochemical techniques viz. X- ray diffraction (XRD), Transmission electron microscopy (TEM), Scanning electron microscopy (SEM) and FT-IR spectroscopy. XRD patterns confirmed the formation of α and γ-Fe2O3 phases. TEM micrograph displayed particles with the average diameter less than 40 nm. The Fe2O3 nanoparticles were used as adsorbent for removal of malachite green dye (MG). Dye concentration was determined spectrophotometrically at 620 nm. . Factors influencing the uptake behaviour for malachite green dye such as pH, contact time, adsorbent dose, temperature and concentration of dye were also quantified. The study showed that the adsorption of malachite green dye was pH dependent and optimum pH for dye removal was 9. The trend for percentage removal of malachite green dye using activated charcoal and NPs synthesized by different fuels and was : activated charcoal > urea > PEG > ODH. Percentage of dye removal increased with increase in temperature from 100C to 400C indicating endothermic nature of adsorption process. Langmuir and Freundlich adsorption isotherms fit the data better than D-R isotherm. Advantage of Fe2O3 NPs over activated charcoal that they facilitate photodegradation of malachite green dye solution in UV/visible light.ennullThesis