engleski

Study of micropollutants photocatalytic degradation using TiO2 and TiO2/CNT in optimal reactor configuration

Nowadays, efforts have been directed towards improving of existing wastewater treatment plants by application of promising advance oxidation process such as solar photocatalysis. Accordingly, an optimal reactor configuration of a semi-pilot scale compound parabolic collector (CPC) reactor was constructed to study the solar photocatalytic degradation of common organic pollutants, imidacloprid (IMI) and diclofenac (DF). Photocatalytic oxidation was assisted either by UV photocatalytically active titanium dioxide (TiO2) or UV-Vis photocatalytically active nanocomposite of TiO2 and carbon nanotubes (CNT) under simulated irradiation spectra. Both photocatalysts were immobilized on fiber glass mesh by modified sol-gel method [1]. Based on the experimental data of photocatalytic degradation, predictive mathematical models were developed including mass transfer considerations and photon absorption. The “intrinsic” photocatalytic reaction constants for the target pollutants in CPC reactor independent on irradiance levels, reactor geometry and hydrodynamics were estimated (kDF=3.564×10-10 s−1W−0.5m1.5 ; kIMI=8.9×10-11 s−1W−0.5m1.5). Results indicated that sensitization of solar photocatalysis by the addition of CNT to TiO2 films, led to intensification of diclofenac and imidacloprid photocatalytic degradation.

photocatalysis, imidacloprid, diclofeanium dioxide (TiO2), carbon nanotubes (CNT)nac, tit

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