Abstract
ABSTRACT In this work, the performance of NMT/KPS process as a hybrid advanced oxidation process has been studied for degradation of organic compound. To this aim, nitrophenol has been used as a typical aromatic compound, which is widely used in industries as an organic toxic precursor. The NMT photo-catalyst was synthesised and characterised by TEM, EDS, XRD and VSM. The characterisation results showed that the catalyst had been synthesised with a particle size of 29 nm and paramagnetic properties. The process was performed in a bench scale glassware photoreactor with 1 l volume. In order to find the optimum condition of the process, the effects of various parameters such as pH, NMT dosage and KPS concentration were modelled and optimised by using design of experiment as a statistical method. The results showed that in the optimum condition by using the NMT dosage of 100 ppm, KPS concentration of 150 ppm, and pH 4, a degradation efficiency of about 89% was achieved for nitrophenol initial concentration of 20 ppm after 60 min. Also, electrical energy consumption was considered as an important industrial criterion that in the optimum condition with rate constant of 0.0479 (1/min), 150 W light source and 1 l of volume, the electrical energy consumption is calculated as 120.2 kWh/m3.
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