Abstract
Degradation of 2,6-Dichlorophenol (DCP) using liquid ferrate(VI) synthesized by wet oxidation method has been studied. Several parameters such as pH (acid, base and neutral), DCP initial concentration, ferrate dosage, and temperature have been examined to determine the optimal experimental conditions. The ferrate(VI) has useful properties such as strong oxidizing power and selectivity and generates a non-toxic end product, Fe(III). Ferrate ion reduced rapidly to Fe(III) and oxygen in acidic and neutral conditions. The experimental results showed the higher DCP degradation efficiency in the neutral condition than in the acidic and basic conditions. The oxidation of DCP strongly depended on the dosage of ferrate added to the reactor and DCP initial concentration. With increasing of ferrate dosage the degradation efficiency of DCP increased, while the degradation efficiency of DCP decreased with increasing of DCP initial concentration. The effect of temperature has been tested at 4 different levels (10, 25, 35, and 50℃). The optimal temperature was obtained in 25℃ and degradation efficiency decreased as the temperature increased in the range from 25℃ to 50℃. The DCP degradation pathways were studied and proposed based on the intermediate products identified by GC/MS analysis.
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