Photocatalytic decomposition of organic contaminants has been regarded as one of the most gorgeous concerns among environmentalist chemists. Organic pollutants containing insecticides have been considered as one of the emerging impurities of environmental resources particularly soil and water. Advanced oxidation processes (AOPs), as one of the most imperative techniques for destruction of pollutants from environments, have been conducted. In spite of its ability, few surveys involving the utilization of photochemical methods to decomposition of refractory organic pollutants have been reported. The use of ultraviolet (UV) light has become progressively more fashionable because comprise no-known disinfection by-products formation. Most of mentioned surveys relied on usual photochemical methods such as conventional UV (low- and medium-pressure) lamps. Herein is a set of experiments considering impact of different structure of UV photoreactors has been conducted due to study the photocatalytic decomposition of Imidacloprid as target organic pollutant, under illumination of UV light and TiO2 photocatalysis. The synergistic impacts of Fe3O4 as co-catalyst in destruction process have been also probed. Photovoltaic-powered UV-light emitting diodes (UVLEDs) have been utilized as UV light sources in present work. UV-LEDs offer potential advantages over traditional UV lamps such as a better efficiency in converting electricity into light, lower power requirements, compactness and robustness, no warm-up time, no disposal problems, environment-friend and longer operational life and also, design flexibility due to their small size.

Photocatalytic decomposition of imidacloprid by TiO2-Fe3O4 nanocomposite in a PV-UV-LED continuous photoreactor

253rd National Meeting (2017)

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