Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 153, Issue 3, Pages 1136-1141Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2007.09.071
Keywords
photolysis; photocatalysis on TiO2; sonolysis; 1,4-dichlorobenzene degradation; energy consumption
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The rate of 1,4-dichlorobenzene (1,4-DCB) degradation and mineralization in the aqueous phase was investigated either under direct photolysis or photocatalysis in the presence of commercial or sol-gel synthesized TiO2, or under sonolysis at 20 kHz with different power inputs. Two lamps, both emitting in the 340-400 rim wavelength range with different energy, were employed as irradiation sources. Photocatalysis ensured faster removal of 1,4-DCB with respect to sonolysis and direct photolysis. The highest degradation and mineralization rate was attained with the combined use of photocatalysis and sonolysis, i.e. under sonophotocatalytic conditions. The efficiency of the employed advanced oxidation techniques in 1,4-DCB degradation is discussed also in relation to their energy consumption, which might be decisive for their practical application. (C) 2007 Elsevier B.V. All rights reserved.
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