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Sonochemical degradation of 2chloro-5methyl phenol assisted by TiO2 and H2O2
P Nalini Vijaya Laxmi1, P Saritha, N Rambabu
1Center for Environment, Institute of Science and Technology, Jawaharlal Nehru Technological University, Kukatpally, Hyderabad 85, Andhra Pradesh, India.
Abstract:
The degradation of 2chloro-5methyl phenol (2C-5MP) in aqueous solution by ultrasonication (US) in the presence of TiO(2) and H(2)O(2) has been studied. Maximum degradation rate of 2.66 x 10(-2) was achieved by US/TiO(2)/H(2)O(2) process when compared to US/TiO(2) (1.01 x 10(-2)) and US/H(2)O(2) (5.5 x 10(-3)) systems. The effect of inorganic ions on degradation rate of 2C-5 MP were found to be in the order of Cl(-)>SO(4)(2-)>HPO(4)(2-)>HCO(3)(-). Further, the impact of synthetic additives like CCl(4) as hydrogen radical scavenger and CH(3)OH as hydroxyl radical scavenger on US were studied which confirmed the involvement of hydroxyl radicals in the degradation of 2C-5 MP. Kinetic studies revealed that the degradation process followed pseudo-first-order mechanism with the correlation coefficient (R(2)) of 0.9913 under experimental conditions.
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