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Research on Treating Phenol Wastewater with Synergy of Combining Electrochemical Oxidation and Catalytic Wet Oxidation

Author: WangZuo
Tutor: LiGuangMing;HuHuiKang
School: Tongji University
Course: Environmental Science
Keywords: Catalytic Wet Air Oxidation Electrocatalytic oxidation Synergistic effect Phenol Wastewater
CLC: X703
Type: Master's thesis
Year: 2008
Downloads: 218
Quote: 2
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Abstract


Catalytic wet oxidation has become one of the best way to handle high concentrations of refractory organic wastewater, limiting its further application of the harsh operating conditions of high temperature and pressure required by the method. Mild reaction temperature and pressure, we propose a combination of new ideas in order to achieve synergies of the three-dimensional electric field effect catalytic wet oxidation, the reaction can be carried out in the low temperature and pressure and maintain a higher organic matter removal. \the particle electrode studies based on the optimization of the catalyst to select suitable superposition of the electric field of catalytic wet oxidation reaction, preliminary exploration of the synergistic effect of the electric field effect and catalytic wet air oxidation of simulated wastewater phenol, and further study the impact of synergy factors. The experimental device developed in the integration of the three-dimensional electric field continuous catalytic wet oxidation reactor design modifications. 2 O 3 composite particles catalyst micro sol - gel prepared Mn-Sn-Sb/γ-Al means of BET, XRD, SEM and EDX structure, surface morphology and phase were characterized and further optimize screened for synergy under the use of Mn-Sn-Sb/γ-Al 2 O 3 Phenol Wastewater obvious synergistic effect. Experimental results show that the integrated reactor at a lower reaction temperature (T = 130 ° C) and oxygen partial pressure (PO 2 = 1.0 MPa) can be quite satisfied with the treatment effect, empty only for 27 min, phenol and TOC removal rate reached 94.0% and 88.4% respectively. Experiment also investigated the reaction temperature (120-150 ° C), the partial pressure of oxygen (0.6-1.4MPa), current intensity (0.25-1.0A), the initial concentration of phenol (1500-3000mg / L), and the influent pH value (3.33 -9.50) and catalyst particle size (20 mesh lt; the Dp lt; 10 mesh) synergies law. The influencing factors research results show that the reaction temperature, oxygen partial pressure, current strength, influent concentration, pH value, catalyst particle size concerted reaction Phenol Wastewater certain. Intermediate and GC-MS detection by UV scanning, explore the synergistic degradation mechanism of phenol. The results showed that the phenol degradation pathway and electrocatalytic oxidation catalytic wet oxidation degradation pathway in the under collaboration oxidation system is basically the same.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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