| The wastewater becomes one of the urgent issues to be resolved currently. The water pollution is diverse and complexity, therefore it puts forward a rigorous test to the traditional methods for the removal of resist biodegradable organic pollutants. Nowadays simple treatment process is hard to satisfy the social need, due to more and more refractory organic pollutants emergence. This problem is a difficulty in water treatment domain and it is effecting the environment that human live in. Human regard the technology of electrochemical oxidation as one of the most important technologies, because of its excellent degeneration capability to organic pollutant. Ti/SnO2 anodes application in the degradation of pollutant is very promising. However, the short service life of Ti/SnO2 anodes limits the electrocatalysis oxidation technology development.In the experiment, the service life test and the phenol degradation efficiency was applied to evaluate electrode stability and electrocatalytic oxidation. The deactivation of the electrodes was studied by Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS), assistant by electrochemical technique, such as Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The result shows that that the electrodes deactivated mainly due to the evolving oxygen diffusing into the substrate to form titanium dioxide-an insulator-can cause a reduction of conductivity and weakening the binding of activated layer to the substrate. Addition of oxides as an intermediate layer interposed between substrate and activated layer, all form of a solid solution, provides a way to improve corrosion resistance, binding force and conductivity.In order to enhance the service life of Ti/SnO2 electrode, Ti/SnO2 electrode with interlayer containing Ru element and Ce doped Ti/SnO2 electrode with interlayer containing Ru element was prepared. The accelerated service life tests showed that the service life of Ti/RuO2 electrode with interlayer containing Ru element electrode was 512 days, and Ce doped Ti/SnO2 electrode with interlayer containing Ru element was 850 days. the problem of service life was solved. It was found that two kinds of electrode could all enhance the service life greatly, but the electrocatalytic characteristics were decreased, which indicated that the anode performance was significantly influenced by its composition.We use Ti/Ru/SnO2 electrode as anode, and regard the stainless steel plate as cathode to degrade coal chemical waste water in a no dissepimental electrobath. The factors such as current density and electrode arrangement are the systematic research in the process of degrading wastewaterl. TOC and UV254 removal is increased as the increasing. of current density; the suitable condition is 20mA/cm2 and the pattern of electrode arrangement is one anode and two cathode. There is an optimal condition for assistant electrolyte concentration. |
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