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In this paper, nanosized TiO2 modified ultra-filtration membrane catalyzed ozonation is studied. Firstly, the mechanism of TiO2-catalyzed ozonation process is confirmed and it was also observed that catalytic ozonation were significantly influenced by tert-butyl alcohol, which testified that nanosized TiO2 catalyzed ozonation of organics follows a radical-type mechanism. In comparison of ozonation...
Red toon leaves have been consumed as herbal medicine and vegetable. In this study, the antioxidant and cytotoxic activities of its ethanol extract were investigated. The results showed that the extract was an effective scavenger in quenching hydroxyl radicals with IC50 of 10.57 mg/mL. A linear correlation between concentration of the extract and reducing power was observed with a coefficient of r2...
Generation of hydroxyl radical (middotOH), one of the major reactive species in the ozonation of water, was directly measured with an electron spin resonance (ESR) spectroscopy. Hydroxyl radical in ozonated water was trapped with 5,5-dimethyl-pyrrolidine-1-oxyl (DMPO) as a stable radical, DMPO-OH, and the amount of DMPO-OH was measured with an ESR spectrometer. The ESR signal of DMPO-OH increased...
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