الفهرس 
REVIEW and LITERATURE SURVEYOnly 14 pages are availabe for public view
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Abstract
Metal oxychlorides of Fe, Cu, Bi and Zn were
prepared and tested in heterogeneous Fenton
degradation of 20 ppm of 2-nitrophenol or nitrobenzene
in the presence of ultrasonic (US, 20 kHz), ultraviolet
(UV, 6 W), and US/UV coupled irradiations. The
different experimental conditions including the catalysts
dosages, hydrogen peroxide concentration, pH value,
temperature, pollutant concentration and irradiation time
were optimized and the reusability of the tested metal
oxychlorides was investigated as well. The degradation
capability of 2-NP or NB follows the order US/UV> UV
> US. The rate constant of degradation using
sonophotocatalytic system was even higher than the sum
of rates of individual systems due to its synergistic
performance. The rate constant of degradation followed
the same order of mentioned metals oxychloride. The
mechanism proposed considers a major role of produced
hydroxyl radicals while the difference in band gap
energy was emphasized in case of Bi and Zn
oxychlorides.