期刊
WATER AIR AND SOIL POLLUTION
卷 200, 期 1-4, 页码 169-179出版社
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s11270-008-9901-y
关键词
Advanced oxidation processes; Compound reduction; Comparative assessment; Dechlorination; Mineralization; Optimization; Recalcitrant; Remediation; Substitution; Trichlorophenol
In the present study, a comparative assessment of 2,4,6-T (2,4,6-Trichlorophenol) degradation by different AOPs (Advanced Oxidation Processes - UV, UV/H2O2, Fenton, UV/Fenton and UV/TiO2) in the laboratory scale is performed. The effects of different reactant concentrations and pH are assessed. 2,4,6-T removal, Total Organic Carbon mineralization (TOC) and dechlorination are monitored. Of all the AOPs, UV/Fenton process is more effective in degrading 2,4,6-T. The optimum conditions obtained for the best degradation with UV/Fenton are: pH=3, Fe+2 concentration of about 5 ppm, and peroxide concentration of 100 ppm for an initial 100 ppm of 2,4,6 T concentration at room temperature. In these conditions, a pseudo first-order rate constant is evaluated. The degradation rate of 2,4,6 T followed the order: UV/Feton > UV/TiO2 > UV/H2O2 > Feton > UV
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