Title: Synergetic Kinetics of Phenolic Wastewater Treatment Using UV/H_2O_2 Systems
Abstract: Though UV/H2O2 process has showed potential application for waster treatment, there were only a few reports on degradation kinetics. In this paper, the synergetic kinetics of phenol wastewater treatment by using UV/H2O2 system was studied. It was found that phenol degradation followed pseudo-first order reaction under individual UV radiation, H2O2 oxidation and UV/H2O2 process. The removal rate of phenol was fairly low in the single UV radiation or H2O2 oxidation process, while it significantly enhanced in the combined UV/H2O2 system. This indicated that there exist synergetic effects in the UV/H2O2 process and it was found that the promoted factor for phenol degradation rate constant is about 7.35. A simplified mechanistic model for phenol degradation was derived accounting for the contribution of individual UV radiation, H2O2 oxidation and hydroxyl radical in the combined UV/H2O2 system. The model was proved to be well suitable for the phenol degradation in the presence of superfluous H2O2. The kinetic reaction equation was fitted as follows, 55322022002.1410[HO]d[R]5.3310[R]2.0410[HO][R][R]d[R]rt---=-=+?.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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