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- W1990356936 abstract "Hydroxyl (OH) radical is proposed as an important factor in the ozonation of water. In the present study, the enhancing effect of 3-chlorophenol on OH radical generation was mathematically evaluated using electron spin resonance (ESR)/spin-trapping technique. OH radical was trapped with a 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) as a stable adduct, DMPO–OH. The initial velocity of DMPO–OH generation in ozonated water containing 3-chlorophenol was quantitatively measured using a combined system of ESR spectroscopy with stopped-flow apparatus which was controlled by home-made software. The initial velocity of DMPO–OH generation increased as a function of the concentration of ozone and the more effectively of 3-chlorophenol concentration. The relation among ozone concentration, amount of 3-chlorophenol and the initial velocity (ν0) of DMPO–OH generation was mathematically analyzed and the following equation was obtained, ν0 (10−6M/s)={9.7×[3-chlorophenol (10−9M)]+0.0005} exp(57×[ozone (10−9M)]). The equation fitted very well with the experimental results, and the correlation coefficient was larger than 0.99. The equation for the enhancing effect by 3-chlorophenol should provide useful information to optimize the condition in ozone treatment process of water containing phenolic pollutants." @default.
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- W1990356936 date "2003-12-01" @default.
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- W1990356936 title "A kinetic study of 3-chlorophenol enhanced hydroxyl radical generation during ozonation" @default.
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- W1990356936 doi "https://doi.org/10.1016/j.watres.2003.07.006" @default.
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