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Study on Treatment of Dyeing Wastewater by Electrochemical Oxidation Process Combined Macroporous Resin Adsorption

Author: WangYu
Tutor: LiuZuo
School: Jilin University
Course: Environmental Science
Keywords: Dye wastewater Electrochemical oxidation Macroporous resin
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 128
Quote: 1
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Abstract


The dye wastewater constituents dye manufacturers in the production process is quite complex, and often contain a variety of organic dyes and virulent, deep color, pH value fluctuations, refractory component changes, a large amount of water, at high concentrations. Dye wastewater is the difficulty of industrial wastewater treatment, and the development of effective dye industrial wastewater treatment technology is an important issue of concern in the environmental protection industry. For dye wastewater pollution problems, the paper analyzes the dye wastewater sources and explains the significance of the dye wastewater characteristics and hazards of dye wastewater and dye wastewater treatment. Determined by adsorption of the dye wastewater treatment at home and abroad the status quo analysis - electrolysis combined treatment of dye wastewater treatment. In this paper, a macroporous resin adsorption and electrochemical oxidation combined with Dye Wastewater Treatment. First use of macroporous resin adsorption of the dye wastewater aromatic ring compounds, measured CODcr and chroma of water under various experimental conditions. Experimental results show that: the pH value of the macroporous resin adsorption of dye wastewater significant impact. Solution under alkaline conditions more conducive to a macroporous resin adsorption of organic dye wastewater. The amount of resin more faster the organic adsorption, the adsorption amount is more. Organic components in the wastewater diverse, there are still some pollutants are more difficult macroporous resin adsorption, macroporous resin is more easily absorbed its skeleton similar aromatic ring compounds. More grown up macroporous resins organics adsorption time, the more reaction time is more than 7 hours to 8 hours, after little change in CODer, adsorption reached equilibrium. CODcr value remains high, so the need to combine the electrochemical oxidation of wastewater reprocessing. In this paper, the thermal decomposition homemade lead dioxide anode electrode of lead dioxide is insoluble anode. Mainly by the hydroxyl radical produced by the oxidation of organics in the wastewater. The oxidation potential of the hydroxyl radicals, known oxidizing agent after F2, capable of oxidizing the vast majority of organic pollutants, and non-selective, the reaction rate can be adjusted. But not ideal for the effect of the stock solution of the dye wastewater treatment, side effects, large energy consumption. Macroporous resin adsorption wastewater treatment effect. Experimental results show that: the higher current intensity is more conducive to the removal of CODcr wastewater. But the strength of 80mA, violent reaction, an increase in side effects the electrode generated across a large number of bubbles, and mass environmental impact of organic pollutants. Stir for electrolysis system is mainly to improve the mass transfer environment, the electrode generated hydroxyl radicals with organic full contact. Thereby increasing the removal rate. Na2SO4 selected only from the conductive electrolyte, to examine the impact of the electrolyte electrolysis. Different electrolyte concentration was found to affect the electrolytic system. The higher the concentration the more favorable electrolysis. However, when the concentration of organic matter is reduced to a certain extent, the high concentration of electrolyte so that the electrolysis reaction is too severe compared the side effects will be increased, while affecting the hydroxyl radical and pollutant contact. pH on the electrode generates hydroxyl radicals, the interaction between the morphology of the pollutants in the wastewater, has an impact, the paper examines the pollutant removal electrolysis for three hours in the different pH values. The pH value of the electrolytic three hours CODcr removal has little effect. Limited impact on the the plate spacing wastewater CODcr removal. Macroporous resin and electrochemical combined with experiments showed that: macroporous resin selective absorption of the aromatic ring compounds in the dye wastewater electrolysis to remove the residual organics in the wastewater after resin adsorption with good targeted , the reaction rate is faster. Entire system to expand the scope of the influent CODcr, and the total removal of up to 99% of the final effluent CODcr lt; 100mg / L.

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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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